4 o R. W. CROSSKEY 



here placed in Dufouriini are much more problematical, for their affinities with 

 Dufouria Robineau-Desvoidy are by no means certain and the placements in 

 Dufouriini are only provisional. The two genera concerned, Kambaitimyia Mesnil 

 and Anthomyiopsis Townsend (synonym Plagioderophagtts Baranov), have recently 

 been placed by Mesnil (1972) in his subtribe Ptilopsinina near to the macquartiines 

 and leskiines and this may well be phyletically appropriate, but the external adult 

 facies in these genera is so much that of Dufouriini that I prefer to continue regarding 

 them as part of this tribe; this has practical advantages until the relationships can 

 be more convincingly ascertained {Kambaitimyia, it may be noted, was originally 

 described as a dufouriine). 



The main characteristics of typical Dufouriini are as follows. Eyes strongly approximated 

 (head often holoptic) in <§, widely separated in 9, bare or haired (almost always bare), uppermost 

 facets sometimes enlarged in £'• ocellar triangle usually rather prominent in £ because of 

 approximated eyes. Head without facial carina, shape usually much as in Text-fig. 32. Anten- 

 nal axis about level with or below eye-middle. Epistome not prominent, g without orbital 

 setae and outer vertical setae, inner vertical setae reduced, hair-like; $ with inner and 

 outer vertical setae, two pairs of proclinate orbital setae and one pair (or sometimes two pairs) 

 of reclinate orbital setae (the latter usually twisted outwards as well as backwards). Facial 

 ridges bare. Parafacials bare (except sometimes the area of profrons where parafacials and 

 parafrontals meet with a cluster of bushy hairing). Vibrissae present, about level with epistome, 

 sometimes not strongly differentiated. Upper occiput usually flat or slightly concave (especially 

 in (J), at most only slightly swollen, with or without black setulae behind the postocular row. 

 Ocellar setae present, sometimes weak in £. Rows of frontal setae usually extending about 

 to level of base of second antennal segment. Antennae small or very small, falling far short 

 of epistome, third segment evenly rounded apically; arista thickened only near base, pubescent 

 to plumose, basal segments short. Proboscis short, palpi fully developed. Humeral callus 

 with two strong setae, pra and second sa setae weak or absent (but usually not both absent 

 simultaneously), dc setae variable, often 2(3) -+- 3(4), sometimes reduced hair-like. Usually 

 two post ia setae, sometimes one, rarely small third in front of anterior one of the main two. 

 Two stpl setae (1 + 1). Presternum and propleuron bare. Propleural seta absent or weakly 

 differentiated. Infrasquamal hairs present or absent. Posteroventral declivity of the thorax 

 membranous medially. Scutellum with two or three pairs of marginal setae, strong apicals 

 plus basals and sometimes also laterals. Fore coxa bare on the inner anterior surface. Leg 

 setae varied, strong to very reduced; mid tibia usually with one small ad seta, sometimes 

 with none or two or more, with or without a submedian v seta ; hind tibia with or without 

 pd preapical seta, without clearly differentiated pv apical seta. Wings hyaline, veins bare or 

 at most with a few setulae confined to the basal node of i? 4+5 . Cell R b open or petiolate. 

 Bend of vein M usually evenly rounded, sometimes slightly to strongly angulate, without an 

 M 2 appendix, vein M sometimes with only a very weak forward curvature. Cross-vein m-cu 

 usually meeting M about midway between r-m and the bend or nearer to r-m. Second and 

 third costal sectors bare or haired ventrally. Lower calypter usually divergent from the 

 scutellum and with somewhat evenly rounded hind margin, relatively small. Abdomen short 

 and rather rotund (Text-fig. no), Ti + 2 not excavate or almost excavate to its hind margin. 

 Abdominal setae usually well developed, tergites often with discals. Sternites concealed. 

 9 terminalia unmodified or postabdomen developed into a long tubular ovipositor recurved 

 under the abdomen. [Small or very small forms, $ often shining black and $ duller with 

 greyish-maculate abdomen, some forms reddish yellow, sexes sometimes strongly colour 

 dimorphic] 



Key to Oriental Genera of DUFOURIINI 

 1 Eyes bare. Scutellum with two or three pairs of marginal setae .... 



