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1 ACAROLOGIA A quarterly journal of acarology, since 1959 Publishing on all aspects of the Acari All information: acarologia@supagro.inra.fr Acarologia is proudly non-profit, with no page charges and free open access Please help us maintain this system by encouraging your institutes to subscribe to the print version of the journal and by sending us your high quality research on the Acari. Subscriptions: Year 2017 (Volume 57): Previous volumes ( ): 250 / year (4 issues) Acarologia, CBGP, CS 30016, MONTFERRIER-sur-LEZ Cedex, France The digitalization of Acarologia papers prior to 2000 was supported by Agropolis Fondation under the reference ID through the «Investissements d avenir» programme (Labex Agro: ANR-10-LABX ) Acarologia is under free license and distributed under the terms of the Creative Commons-BY-NC-ND which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

2 SOlVIE PREDATORY MITES OF THE GENERA TYPHLODROMUS AND AMBLYSEIUS FROM JAPAN (PHYTOSEIIDAE) 1 (With 18 Text-figures) BY Shôzô EHARA (Zoological Institute; Fac~tlty of Science, Hokkaido University) The genera Typlûodromus and Amblyseùts were formerly distinguished by relative setal length, but there are sorne species which are transitional in this character.. Recently, CHANT (1957 a, 1957 b) combined the genera Typhlodromus and Amblyseùts as subgenera of Typhlodrom1,tS sens1t lata. On the basis of a comprehensive study of setal development (CHANT, 1958), he defined that the subgenus Typhlod1'omus has more than four pairs of anterior lateral setae on the dorsum, while the subgenus Amblyseùts bears four pairs of anterior lateral setae. ATHIAS-HENRIOT (1958) elevated the subgenera Typhlodromtts and Amblyseùts in Chant's sense to two independent genera. For the time being, the present author prefers to recognize the genera Typhlodromtts and Amblyseius, in agreement with Athias-Henriot's treatment. In a previous paper the author (1958) recorded three species of the genus Typlûodromus from J a pan. According to the above definition of the genera, the scientific name of these three species should be changed as follows : Amblyseius finlandicus (Oudemans) Amblyseùts longispinosus (Evans) Amblysei~ts japonicus (Ehara) This is the second paper treating mites belonging to the Phytoseiidae from J a pan. The following is a list of the species here reported : Typhlodrom~ts mtlgaris n.. sp. A mblyseùts longispinosus (Evans) A mblyseius rademacheri Dosse 1. Contribution No. 435 from the Zoological Institute, Faculty of Science, Hokkaido University, Sapporo, Japan. Acarologia, t. I, fasc. 3, I959

3 Amblyseius ts~tgawai n. sp. Amblyseùts orientalis n. sp. Amblyseius largoensis (Muma) lviost of the specimens here studied were collected by the author himself ; sorne of them were forwarded to him by Prof. R. HAYASHI (Toyama University), Mr. N. HIKICHI (Fukushima Prefectural Horticultural Experiment Station), Mr. H. HORIUCHI (National Tôhoku Agricultural Experiment Station), Mr. lvi. KoHONO (Kagashima Prefectural Fruit Tree Experiment Station), Prof. lvi. SHIBUYA (Kagoshima University), and Mr. C. TsuGAWA (Aomori Prefectural Apple Experiment Station). The author is very grateful to the above-mentioned gentlemen. For suggestions or information his thanks are also dne to Dr. E. W. BAKER (U. S. National Museum, Washington, D. C.), Dr. D. A. CHANT (Entomology Laboratory, Belleville, Ontario), Dr. G. DossE (Institut für Pfianzenschutz der Landwirtschaftlichen Hochschule, Hohenheim bei Stuttgart), and Dr. P. GARMAN (Connecticut Agricultural.Experiment Station, New Haven, Connecticut). Furthermore, he wishes to thank Dr. M. H. MUMA (Florida Citrus Experiment Station, Lake Alfred, Florida) for lending specimens of a few Florida species. Finally, grateful acknowledgement must also be extended to Prof. Tohru UcHIDA who kindly made most expert suggestions. Typhlodromus vulgaris n. sp. (Fig. r-5) Female. Body from above oval, 360 [1. long and 240 [1. wide in widest part, generally grayish white in colour and sometimes pinkish. Fixed digit of chelicerae with three teeth distally ; movable digit with a distal and two subdistal adjacent teeth. Leg IV with a spatulate macroseta on the genu, tibia and tarsus, that on tarsus the longest ; these setae arising approximately perpendicularly to the axis of each segment. Peritreme long, not extending between the setae D 1 ; the posterior portion curving around coxa IV, and ending in acute angle. Dorsal shield reticulate, with five pairs of pores (Fig. r), and carrying eighteen pairs of setae : ten in the lateral, two in the median, and six in the dorsal rows. Among these setae, L 10 the longest (66 tl) and D 6 the shortest; M 2 more or less paired with L 8, slightly shorter than VL 1 which is shorter than LLo Sternal shield with three pairs of setae. Ventrianal shield longer than wide and wider than genital shield, with anterior margin convex and lateral margins concave. The shield reticulate, with four pairs of preanal setae, with a pair of pores behind the third preanals, and with a pair of paraanal setae. Four pairs of setae surrounding ventrianal shield, one (VL 1 ) long. Male. Body elliptical in contour, 260 [1. long and r6o [1. wide in widest part. Similar to female in dorsal chaetotactic pattern, but l\1 2 about as long as VL 1. J.VIovable digit of chelicerae bearing Y-shaped spermatophoral process. Tarsus IV

4 - 287 with three macrosetae as in female. Ventrianal shield broadly triangular, reticulate, with four pairs of preanal setae. Holotype. ~. Sapporo, Hokkaido, I4-VIII-rgs8 (on apple), S. EHARA leg. Allotype. 3, same data as holotype. Paratypes. Sapporo, I ~. 4-VIII-rgs8 (on apple), I ~. s-vm-rgs8 (on Alnus himda Turcz.), r ~. rz-vm-rg58 (on elm), r 6" & 6 ~~. I4-vm-rgs8 (on apple), 4 ~~. zr-vm-rg58 (on willow), r 6 & 9 ~~. zz-vm-rgs8 (on willow), 4 ~~. z-rx-rgs8 2 3 FIG Typhlodromus vulgaris n. sp. - r. Dorsum of female Basitarsus, tibüi and genu of leg IV of female. - 3 Posterior part of peritreme of female. - 4 Ventrianal shield of female. - 5 Ventrianal shield of male. (on sasa bamboo), S. EHARA leg.; Otaru, Hokkaido, r 6 & z ~~. 3-rx-rg58 (on sour cherry), S. EHARA leg. ; Tappu-yama, lviikasa, Hokkaido, 6 ~~. IJ-Ix-rgs8 (on todo-fir), S. EHARA leg. ; Kuroishi, Aomori Pref., Honshu, r ~. z8-v-rg55 (on apple), C. TSUGAWA leg. ; Fujisaki, Aomori Pref., z ~~. zs-v-rgss (on apple), 4 66 & 4 ~~. z-rx-rg58 (on apple), H. HoRIUCHI leg. The types are preserved in the Zoological Institute, Faculty of Science, Hokkaido University. Distrib~ttion. J a pan (Hokkaido, Honshu). Remarks. Among ali the members belonging to the genus and having ten pairs of lateral setae, Typhlodrom~ts mtlgaris n. sp. is unique in the spatulate macrosetae on leg IV of both sexes and the remarkable shape of the ventrianal shield of female. The new species shows sorne resemblances to Typhlodromus georgicus Wainstein, 1958, from Georgian S.S.R., especially in the arrangement of dorsal pores, but

5 ,, 1 - z88- differs from the latter in the dorsal chaetotaxy, the macrosetae on leg IV, and structure of spermatophoral process. Kampimodrom~ts heveae 1 " 2 (Oudemans, 1930) from Sumatra and Typhlodromus jackmickleyi De Leon, 1958, from Florida, are ' similar to the new species in the macrosetae on leg IV, which are slightly expanded at tip, but they have longer setae on dorsum and three-paired preanal setae on ventrianal shield. The present mite is apparently common on apple leaves in northern J a pan. Amblyseius longispinosus (Evans) Typhlodromus longispinosus, EHARA, 1958, Annot. Zool. ] ap., 31 (1) : 55, Fig Specimens examined. Sapporo, Hokkaido, 1 ~. 21-VI-1958 (on mulberry), 7 ~~ & 4 ~~. 20-VIII-1958 (on mulberry), 2 ~~. 12-vm-1958 (on elm), 2 ~~ & 1 ~. 2-rx-1958 (on sasa bamboo), S. EHARA leg. ; Iizaka, Fukushima Pref., Honshu, 3 ~~. 17-vn-1958 (on mulberry), S. EHARA & N. HIKICHI leg., 1 ~. vm-1958 (on Oxalis), N. HIKICHI leg. ; Kagoshima, Kagoshima Pref., Kyushu, 1 ~. 22-vi-1956 (on hydrangea), 1 ~. 27-VI-1956 (on dahlia), S. MAEDA leg. ; Tarumizu, Kagoshima Pref., 1 ~. 14-vm-1958 (on citrus), M. KoHONO leg. This species was recently recorded by the auth0r (1958) from Honshu, J a pan. Further specimens have been available for the present study. This mite is new to the islands of Hokkaido and Kyushu, but is probably common in this country. Amblyseùts rademacheri Dosse (Fig. 6-rr) Amblysei~ts rademacheri, DossE, 1958, Pflanzensclw-tz-Ber., 20 (rj2) : 9, Abb. 18. Amblyseùts rademacheri DossE, 1958, Pflanzensch~ttz-Ber., 21 (3/4) : 44, Abb. 1- Abb. 5 (original description.) Female. Body from above elongate oval, 360 [Llong and 190 fl wide in widest part, grayish white in colour. Fixed digit of chelicerae with at least eight teeth. Leg IV with macroseta on the genu, tibia and tarsus, that on tarsus the longest. Peritreme long, extending well between the setae D 1 ; the posterior part curving around coxa IV, having terminal truncate portion, and ending in acute projection. Dorsal shield with rather longitudinal reticulations laterally, with irregularly polygonal reticulations medially, and bearing seventeen pairs of setae, of which nine are lateral. Setae L 4, M 2, and L 9 very long (70, 76, and 150 fl respectively), M 2 and L 9 pectinate; D 1 and L 1 long, L 1 a little longer; other setae on dorsum short or minute; M 2 more or less paired with L 7, the distance between M 2 and L 7 generally shorter than that between M 2 and L 8. Sternal shield with three pairs of setae. Ventrianal shield longer than wide and wider than genital shield, with lateral margins I. CHANT (1955) considers that the genus Kampimodromus is synonymous with the genus Typhlodromus s. lat. 2. The male remains unknown bqth in K. heveae and T. jackmickleyi.

6 -289- slightly or moderately concave. The shield reticulate, " ;ith three pairs of preanal setae, with a pair of pores more or less in line laterally with the third preanal setae, and with a pair of paraanal setae. Four pairs of setae snrrounding ventrianal shield, one (VL 1 ) long (50 fl), shorter than L 4 but longer than L 1. Spermatheca as.in Fig. 9 j FIG. 6-II.- Amblyseius rademache1'i.- 6. Dorsum of female.- 7 Posterior part of peritreme of female Ventrianal shield of female. - g. Spermatheca. - Io. Spermatophoral process. - II. Ventrianal shield of male. 111 ale. Body elliptical in contour, 290 fl long and 180 fl wide in -vvidest part. Similar to female. L 9 69 fl long. lviovable digit of chelicerae with spermatophoral process as shown in Fig. 10. Ventrianal shield broadly triangular, reticulate, with three pairs of preanal setae. Specimens examined. Sapporo, Hokkaido, 1 ~, 21-viii-1958 (on willow), 3 ~~, 23-VIII-1958 (on sasa bamboo), 2 ~~, 25-vm-1958 (on Q2tercus crispula Blume), 1 CS & 4 ~~' 2-rx-1958 (on sasa bamboo), 1 ~' 10-rx-1958 (on Querc-us crisp2tla Blume), S. EHARA leg. Distrib2ttion. First recorded from Japan (Hokkaido); Germany. Remarks. The manuscript of the present description and figures was sent to Dr. G. DossE for the comparison with types of A. rademacheri, and this mite has been identified with A. rademacheri by him. Judging from Oudemans' drawings (NESBITT, 1951) of the male of Kampimo.drom2tS hevearum (ÜUDEMANS, 1930), the female of which is unknown, A. rademacheri is probably allied to K. heveantm. In the male of A. rademacheri seta L 4 is shorter

7 - zgoand narrower than seta M 2, while, in the same sex of K. hevearmn seta L 4 is similar to seta M 2 both in length and thickness. At a glanee the present species is characterized by very long, three-paired setae on dorsum. Amblyseius tsugawai n. sp. (Fig. rz-r3) Female. Body from above oval, 410 fl long and z6o fl wide in vvidest part. Fixed digit of chelicerae with about seven teeth in addition to one subterrriinal process. Leg IV with a comparatively short macroseta on genu, tibia and tarsus ; the genual seta 53 fl, the tibial one 50 fl, the tarsal one 8r fl Peritreme long, reaching in front of the base of seta D 1 anteriorly; the posterior part curving around coxa IV and having terminal truncate portion. Dorsal shield reticulate, bearing seventeen pairs of setae, lateral setae nine-paired. Setae L 4, l\1 2, and L 9 very long (55, 55, and 130 fl respectively), D 1 and L 1 long, remaining setae on clorsum short or minute; M 2 doser to L 7 than to L 8, more or less pairecl with L 7 Sternal shield with three pairs of setae. Ventrianal shield longer than wicle and wider than genital shield, slightly constricted laterally. The shield reticulate, with three pairs of preanal setae, with a pair of pores behind the level of the third preanal pair, and with a pair of paraanal setae. Four pairs of setae surrounding ventrianal shield, one (VL 1 ) long (52 p.), shorter than L 4 and M 2 but longer than L 1. r 1 ' \ 1 /! 1 / r \ sor 12 \ FIG Antblyseius tsugawai n. sp Dorsum of female. - I 3 Ventrianal shield and surrounding setae of female.

8 - zgrlviale. Unknowri. Holotype. ~' Kuroishi, Aomori Pref., Honshu, I2-IX-I955 (on apple), C. TsuGAWA leg. The type is deposited in the Aomori Prefectural Apple Experiment Station. Dist?'ib ~dion. Japan (Honshu). Remarks. Amblyseùts tsugawa1: n. sp. resembles Amblyseùt.s andersoni 1 (1. c. I957) from Canada, but differs from the latter in length of a few setae on dorsum,. and in shape of the ventrianal shield. Furthermore, the new species is different from A. andersoni in the macrosetae on leg IV. The tarsal macroseta of the species is much longer than genual seta which is slightly longer than tibial seta. According to a persona! letter from Dr. CHANT these setae of A. andersoni are ail long but the tarsal one is slightly longer than the others. A. ts~t gawai n. sp. is somewhat like A. potentillae 2 (Gm man, rg58); but is different in the anterior termination of peritremes and the macrosetae on leg IV. Dr. BAKER kindly examined types of A: potentillae for the present au thor and pointed out : " r. The paratreme (trachea) of potentillae ends just before it reaches the position of the first pair of anterior setae. 2. The longest seta is probably that on the genu; this is only slightly longer than the tarsal seta ; the tibial seta is not as long or as strong as the other two. " The new species is named in honour of Mr. Chikara TsuGA WA who collected this interesting mite. Amblyseius orientalis n. sp. (Fig. r4-r6) Amblyseùts sp., EHARA, rg58, Annot. Zool. Jap., 3I (r) : 55 Female. Body from above oval, 380 fl long; z6o fl wide in gravid mite and 2ro fl wide in non-gravid mite ; grayish white in colour. Fixed digit of chelicerae vvith at least ten teeth in addition to a few distal processes ; movable digit with three or four teeth. Leg IV with a very long, whip-like macroseta on the genu, tibia and tarsus, that on genu the longest. Peritreme long, extending beyond the base of seta D 1 and almost meeting in the midline ; the posterior part curving around coxa IV, having terminal truncate portion, and ending in acute projection. Dorsal shield with seventeen pairs of setae, of which nine are lateral. Setae L 4, M 2, and L 9 very long, whip-like (roo, rro, and 240!1 respectively) ; setae D 1 and L 1 longer than remaining ones on dorsum, which are short or minute. Seta L 1 longer than D 1 ; L 3 generally longer than L 2 ; L 6 generally shorter than L 2 but sometimes as long as it. M 2 doser to L 7 than to L 8, more or less paired with L 7 Sternal shield with three pairs of setae, the posterior margin straight. Ventrianal shield considerably variable in shape by individuals. The shield longer than wide and wider than genital shield ; the lateral margins weakly notched. A pair of pores occur slightly I. The male of A. anders ani is unknown. z. The male of A ~ potentillae is unlmo\vn.

9 -292- behind and between the third preanal setae ; a pair of paraana1 setae borne laterad ofthe anterior portion of anus. Four pairs of setae surrounding ventrianal shield, o;e (VL 1 ) long (Sr!J.), a little shorter than L 4 and longer than L 1 u \ &-- --o ~ ~r ' / ' ' r \ r \ tffir î 15 ~ FIG Amblyseius orientalis n. sp Dorsum of female Ventrianal shield and surrounding setae of female Ventrianal shield of male. Male. Body from above elliptical, 280!-'- long and r6o!-'- wide in widest part. Sirnilar to fernale. Seta M 2 stouter than L 4 ; La longer than L 2 Sperrnatophoral process shallowly bifurcate at distal end. Viewed from a certain direction the process is Y-shaped. Ventrianal shield triangular, reticulate, carrying three pairs of preanal setae. Holotype. ~. Sapporo, Hokkaido, ro-rx-1958 (ou Q~tercus crisp~tla Blurne), S. EHARA leg. Allotype. cj', sarne data as holotype. Paratypes. Sapporo, 2 ~~. 5-VIII-1958, 6 ~~. 25-VIII-1958, r ~. 4-x-1956, I c3 & 4 ~~. ro-ix-1958, 2 ~~. IJ-IX-1956, on Q~terc~ts crisp,ula Blurne, S. EHARA leg. Thé types are deposited in the Zoological Institute, Faculty of Science, Hokkaido University. Distribution. Japan (Hokkaido). Remarks. The new species can be distinguished from ali known rnernbers of the gem1s by length of the setae L 2 and La of both sexes, and also by shape of

10 -293- the ventrianal shield of female. The types were collected together with sorne specimens of Amblysei~ts finlandic%s (OUDEMANS) (EHARA, 1958). Amblysei%s largoensis (lviuma) (Fig ) Amblyseiopsis largoensis lviuma, 1955, Ann. Ent. Soc. Amer., 48 (4) : 266, Fig. I0-!2. Amblyseiopsis largoensis, GARMAN, 1958, Ann. Ent. Soc. Amer., 51 (r) : 76, Fig. 8. Female. Body from above oval, 390 fl long and 280 fl wide in widest part, pinkish in colour. Fixed digit of chelicerae with many (at least eight) teeth. Tarsus IV with a very long, whip-like macroseta on the genu, tibia and tarsus, genual seta the longest. Peritreme long, extending forward to seta Dr ; the posterior part curving around coxa IV, having terminal truncate portion, and ending in acute projection. Dorsal shield carrying seventeen pairs of setae, of which nine are lateral. Setae L 4, M 2, and L 9 very long, whip-like (roo, no, and 250 fl respectively) ; setae Dr and Lr longer than other orres on dorsum, which are of minute size. Seta Lr longer than Dr; L 2, L 3, L 5, and L 6 are appro~imately equal! \! \ '\ ~J 1 25 l' ~ 18 FIG Amblyseius largoensis. '" 17. Dorsum of female. and surrounding setae of female. rs. Ventrianal shield

11 -294- m length. M 2 doser to L 7 thau to L 8, more or less paired with L 7 Sternal shield with three pairs of setae. Ventrianal shield much longer thau wide and narrower thau genital shield ; strongly constricted near the middle, vvidest at the level of anus, with anterior margin convex. The shield provided with three pairs of preanal setae, with a pair of pores close to the third preanal setae, and with a pair of paraanal setae. Four pairs of setae surrounding ventrianal shield, one (VL 1 ) long (63 f.l),. longer thau L 1. Male. Not available. Specimens examined. Toyama, Toyama Pref., Honshu, 3 ~~. 2-IX-1958 (on chrysanthemum), R. HAYASHI leg. Distribution. First recordecl from Japan (Honshu) ; U.S.A. Remarks. The present specimens were comparecl with specimens from Floricla, the latter being kindly sent by Dr. M. H. MuMA to the author. A. largoens is seems to be similar to one form 1 of A. caudatus Berlese, 1914, only the female of which is known, in structure of the ventrianal shield (CHANT, 1957 a), but they are different from each other in the following aspects. In A. largoensis the distance between the third preanal and paraanal setae is slightly longer thau that between the first and third preanal setae, while, in A. cattdattts the former distance is approximately twice as long as the latter. Furthermore, the anterior margin of the ventrianal shielcl is convex in A. largoensis but straight in A. cattdatus. REFERENCES ArHIAS-HENRIOT, C Phytoseiidae et Aceosejidae (Acarina, Gamasina) d'algérie. II. Phytoseiidae : clé des genres, genres Amblyseius Berlese (suite) et Seiulus Ber. lese. Bull. Soc. Hist. Nat. Aft. Nord. 49 (1j2) : BERLESE, A Acari nuovi._ Redia 10 : n CHANT, D. A Notes on mites of the genus Typhlodromus Scheuten, 1857 (Acarina : Laelaptidae), with descriptions of the males of sorne species and the female of a. new species. Canad. Ent. 87 (n) : CHANT, D. A a. -Descriptions of sorne phytoseiide mites (Acarina : Phytoseiidae). Part I. Nine new species from British Columbia with keys to the species of British Columbia. Part II. Redescriptions of eight species described by Berlese. Canad.. Ent. 89 (7) : CHANT, D. A b. - Note on the status of sorne genera in the family Phytoseiidae (Acarina). Canad. Ent. 89 (n) : CHANT, D. A Immature and adult stages of sorne British Phytoseiidae Berl., 19I6 (Acarina). ]. Linn. Soc. Land., Zool. 43 (294) : DossE, G a.- Die Spermathecae, ein zusatzliches Bestimmungsmerkmal bei Rauh- milben (Acar., Phytoseiidae). Pflanzenschutz-Ber. 20 (1j2) : I-II. r. It was reported by CHANT (r957 a) that there are two forms in A. caudatus Berlese..

12 -295- DossE, G b. -Über einige neue Raubmilbenarten (Acar. Phytoseiidae). Pflanzenschutz-Ber. zr (3/4) : EHARA, S Three predatory mites of the genus Typhlodromus from Japan. Annot. Zool. ]ap. 31 (r) : GARMAN, P New species belonging to the genera Amblyseius and Amblyseiopsis with keys to Amblyseius, Amblyseiopsis, and Phytoseiulus. Ann. Ent. Soc. Amer. sr (r) : DE LEON, D Four new Typhlodromus from southern Florida (Acarina: Phytoseiidae). Fla. Ent. 41 (z) : MuMA, M. H Phytoseiidae (Acarina) associated with citrus in Florida. Ann. Ent. Soc. Amer. 48 (4) : NESBITT, H. H. J A taxonomie study of the Phytoseiinae (Family Laelaptidae) predaceous upon Tetranychidae of economie importance. Zool. Verh. r2: r-64, 32 p!s. ÜUDEMANS, A. C Acarologische Aanteekeningen CIII. Ent. B er. 8 (r73) : 97-ror. WAINSTEIN, B. A [Sorne new species of Typhlod1 omus (Parasitiformes, Phytoseiidae) in Georgia.] (In Russian.) Soobsh. Akad. Nauk Cruz. S. S. R. zr (2):