Arthrolytus, Thomson, 1878

Doğanlar, Mikdat, 2018, World species of Arthrolytus (Hymenoptera Pteromalidae, Pteromalinae), with description of new species, Linzer biologische Beiträge 50 (1), pp. 255-289 : 256-259

Arthrolytus THOMSON, 1878

Pteromalus (Arthrolytus) THOMSON, 1878: 158. Type-species: Pteromalus (subgenus Arthrolytus ) punctatus THOMSON by monotypy; ASHMEAD 1904: 225; SCHMIEDEKNECHT 1909: 155.

Arthrolytus (Anadolytus DOĞANLAR), 1978: 1111. Subgenus, Type species: Arthrolytus oezbeki DOĞANLAR, original designation and monotypy.

Arthrolytus ( Anarthrolytus GRAHAM), 1969: 792. Subgenus, Type species: Eutelus ocellus WALKER, 1834 original designation and monotypy.

D i a g n o s i s: ♀: Head and mesosoma dull, sculptured, Metasoma smooth and shining; head with clypeal margin truncate or with 2 very obscure teeth; right mandible with 4 teeth, left mandible with 3, or both mandible with 3 teeth, dorsal tooth of each mandi- ble truncate, ventral teeth acute; maxillary palp with 4 segments, apical one long, labial palp with 3 segments, second segment short. Eyes bare or with relatively short inconspicuous pubescence. Occiput not carinate, vertex not broad; head transverse in dorsal aspect, or the head is strongly protuberant at the level of the antennal toruli. Anterior margin of clypeus not deeply incised, at most moderately emarginate. Antennae inserted at or even slightly below level of ventral edge of eyes, antennal formula in ♀ 1 1 2 6 3. Antennal clava with at most a small area of micropilosity on its apical segment only. Antenna with scape almost as long as an eye; first funicular segment elongate, at least slightly constricted in its proximal half, longer than the pedicellus and much longer than any of the other funicular segments, club very short, at most about 1.5 times as long as broad, asymmetrical; or first funicular segment of antenna not constricted proximally, often relatively short; club often relatively longer, then the first funicular segment of the antenna is nearly always shorter than the pedicellus, or first funicular segment of antennae as long as or slightly longer than the pedicellus, flagellum stout and cylindrical, club very short, only about 1.5 times as long as broad.

Pronotum with collar rounded off in front; dorsum of mesosoma not flatened; notauli incomplete, scutellum without frenal groove. Fore wing with apical margin nearly always bare at least between the end of the postmarginal vein and tip of the wing; upper surface, beyond the middle, with ordinary, moderately dense or with only moderately dense pilosity below the marginal vein; usually immaculate, or with a fuscous cloud below the marginal vein or occasionally with infumate cloud. When forewing is maculate, then the marking usually consists of a cloud around or below the stigmal vein; but if there is a single cloud below the marginal vein, immediately beyond the speculum, this cloud usually extending to the marginal and stigmal veins and often forming a transverse band; stigmal vein forming an acute angle or less acute with the postmarginal vein.

Propodeum median carina present, with plicae complete or nearly so, or absent: costula sometimes indicated or propodeum often with some indication of a costula. Propodeal nucha represented merely by a lunate strip which is weakly sculptured or smooth. legs stout, especially femora.

Metasoma ovate, pointed apically in ♀, subflatenned dorsally, usually lighter in color at base.

♂: Fore wing with fuscous markings, at least a dark cloud below the stigmal, or hyaline; occiput not margined; Antennae with funicular segments more compacted, separated by inconspicuous peduncles. Antennal formula 11263 or 11272 and 11281; funicular segments mostly elongate, the first segment 3.5 to 5 times, or as long as pedicel; the last segment 1.7 to 2.5 times, as long as broad; Propodeum with plicae indicated in at least the basal half; postspiracular sclerite moderate-sized; head, and mesosoma excluding propodeum, with very inconspicuous hairs which are not whitish. Genae rarely produced ventrad of the clypeal margin; if so, then not forming convex protuberances, and the eyes with short inconspicuous hairs, the antennae sometimes extensively darkened.

D i s t r i b u t i o n: Nearctic, Euroasian regions.