Astymachus felix Singh and Hayat

Noyes, John S. & Higashiura, Yoshimitsu, 2020, The species of Astymachus Howard (Hymenoptera: Encyrtidae) ı potentially important parasitoids of Aclerdidae (Hemiptera: Coccoidea) associated with grasses (Poaceae) ı with descriptions of three new species, Journal of Natural History 54 (9), pp. 665-679 : 670-671

4. Astymachus felix Singh and Hayat

( Figure 2e )

Astymachus felix Singh and Hayat, 2005: 62 – 64 . Holotype ♀, India, FRID, not examined. Astymachus japonicus Howard ; Fatima and Shafee 1994: 117. Misidentification.

Diagnosis. Female. Length, including ovipositor, 1.25 – 1.45 mm. Body generally yellow, frons suffused pale brown anterior to median ocellus, gena dusky, antenna brown; fore wing generally suffused pale brown with a small, more strongly infuscate area on and below marginal vein and a slightly darker elongate streak parallel to posterior margin proximally; head about 1.8× as long as eye; palp formula 4 – 3; antenna with F1 – F5 strongly transverse, anneliform; linear sensilla only on F6; clava entire; scutellum with about 16 – 18 setae; wings not shortened, fore wing about 3.3× as long as wide, reaching well past cercal plates; marginal vein ( Figure 2e ) not quite reaching anterior wing margin and about as long as stigmal vein; discal setae ( Figure 2e ) below marginal vein about as long as distance between them or at least 4× as long as diameter of socket; ovipositor about 2.6× mid tibia and 2.4× gonostylus. Male. Length 0.87 – 1.17 mm. Similar to female; antenna with F1 subquadrate, F2 – F5 strongly transverse, subequal, F6 larger, subquadrate.

Biology. Unknown.

Distribution. India (Assam, Manipur, Uttar Pradesh) ( Singh and Hayat 2005).

Material examined. None.

Comments. Females of this species can be recognised by the relatively long setae on the wing disc. It is the only species known where the setae are as long as the distance between the sockets.

Figures

Figures 2. Astymachus saccharum sp. nov.: (a) head (holotype); (b) antenna ♀ (holotype); (c) apex of fore wing venation (paratype); (d) fore wing (paratype). Astymachus felix Singh and Hayat: (e) apex of fore wing venation. Astymachus phainae Sugonjaev: (f) fore wing; (g) apex of fore wing venation. Astymachus lasallei sp. nov. (holotype) (h) antenna ♀; (i) head; (j) fore wing; (k) discal setae below marginal vein, enlarged (differential interference contrast); (l) apex of fore wing venation. Asymachus phragmitis Trjapitzin: (m) head; (n) antenna ♀. (Figures e-g courtesy of Mohammad Hayat).