Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 10. (Budapest, 1977)

Parasit. Hung. 10. 1977. Archidispus sphecis sp. n. (Acari: Tarsonemida), a New Mite Species on Digger Wasps in Vietnam Dr. James D. LANG — Dr. Sándor MAHUNKA Department of Entomology, University of California, Riverside, USA — Zoological Department of the Hungarian Natural History Museum, Budapest, Hungary "Archidispus sphecis sp. n. (Acari: Tarsonemida), a new mite species on digger wasps in Vietnam."- Lang, J.D. - Mahunka, S. - Parasit. Hung. _10. 125-127. 977. ABSTRACT. A new Archidispus species from Sphecid wasps found in Vietnam is described. The senior author made extensive zoological collectings in Vietnam. In the material he found several Sphecid wasps (Sphex sp. and Larra sp. ) which carried on the ventral side and especially in the coxal region a number of specimens of Scutacarid mites. The latter proved to represent a new species relegable to the genus Archidispus; its description follows. Archidispus sphecis sp.n

. Measurements: Length 232-254 ju, width 180-192 u. Habitus: Anteriorly convexely, posteriorly flatly, arcuate. Clypeus hardly wider than other body segmehts. Dorsal side (Fig, 1): Clypeal hairs approximately equal in length, inner pair originating posterior to outer one. Segments D-F with hair d^ longest of all setae, hairs e-^ and f^ slightly shorter, hairs e

2 anc

^ ^considerably shorter than their corresponding inner mates, hair fj of these latter only slightly longer than its mate. Segment H with hair h-^ longest of aU setae, hair h

2 immediately adjacent to it, minute. Trichobothrium : Outer marginal spine long, heavily acuminate. Inner one and bothridial hair approximately equal in length and thickness. Clavus of sensilus rounded. Ventral side (Figi.2): Apodemes of both anterior and posterior sternal plates developed, ap. 4 especially long, reaching lateral margin of sternal plate. Secondary transverse apodeme indiscernible. Epimeral hairs simple, none^f them incrassate. Anterior eternal plate with hair la longest, hair 2b shortest of all setae. Anterior margin of posterior sternal plate slightly widened, no essential difference in length between hairs 3a-3b-3c, hair 3b originating slightly posterior to 3a and 3c. Setae 4a far removed anterior to hairs 4b, both equal in length, setae 4b not approaching posterior margin of body. Legs: Tibiotarsus of leg I (Fig. 3) fusiform, not incrassate nor shortened; also claw simple, but stalk of claw with a charp, projecting apex. Hairs d and ld2, respectively, arising on a common, low, chitinized peg. Solenidium O2 minute. Legs II and III (Figs. 4, 5) simple, without spiniformly incrassate hairs. Tarsus of leg IV (Fig. 6) much elongated, hairs arising far from one another; hair ld^ (Fig. 6) minute, essentially shorter than praetarsus. Material examined: Holotype: Vietnam, Lai Khe, 16 April, 1968. Ex. ventral thorax of Sphex sp. (Hymenoptera), leg. J.D. LANG; 3 ex. paratypes, same data; 1 ex. paratype: same loc-