96 R. W. CROSSKEY 



Eyes densely haired, sometimes very strongly approximated in <$. $ without proclinate 

 orbital setae (sometimes one pair in J anthinomyia) . Epistome produced forwards (e.g. as 

 Text-fig. 49) (except in Hyalurgus). Palpi fully developed. Proboscis short. Presternum 

 bare or with a few very fine inconspicuous hairs. Propleuron bare. Four or five humeral 

 setae. Three post ia setae. Usually three stpl setae (two or four occasionally). Pteropleural 

 seta developed, at least as long as upper calypter. Scutellum usually with at least four pairs 

 of marginal setae. Mid tibia with several ad setae and a v seta. Hind tibia with a pv apical 

 seta (sometimes small and inconspicuous). Second costal sector bare ventrally [note: Mesnil's 

 (19716 : 1004) statement that it is haired in vicinus is not confirmed by examination of the 

 type]. Cell i? 5 open. Setulae on /? 4 + 5 not extending more than halfway to r-m. Abdominal 

 Ti+ 2 excavate to hind margin. Intermediate abdominal tergites with erect discal setae. 

 Sternites partially or widely exposed. 



There are no host records for Oriental Ernestiini yet available. The three Oriental 

 species of Hyalurgus can be distinguished by the keys of Mesnil (1967; 1972). 



Key to Oriental Genera of ERNESTIINI 



[Note. The Tibetan genus Everestiomyia is included in case it should be found on the 

 Nepalese side of the Himalayas.] 



1 Metallic green, blue or blue-violet forms, sometimes with coppery-red tinges (especially 



on the abdomen). Two posthumeral setae (except in J anthinomyia) ... 2 



- Non-metallic forms, colour generally blackish or brownish. One posthumeral seta . 4 



2 Four post dc setae. Parafacials bare. Palpi black or brownish black (at most with 



tawny apices). Setulae on i? 4+5 confined to basal node. Humeral setae not 

 arranged with three in a basal line, the three strongest humerals normally in an 

 obvious triangular arrangement ......... 3 



- Three post dc setae. Parafacials wholly or partially haired. Palpi yellow. Setulae 



on i? 4+5 extending half way to r-m. Humeral setae variable, but normally the 

 main three standing obviously in a straight basal line 



CHRYSOSOMOPSIS Townsend 



3 Bend of vein M without an M 2 appendix. Abdominal sternites with strong spiniform 



setae. One posthumeral seta. <J frons broad, inner vertical setae strongly 

 developed. Upper occiput with a regular row of strong black setulae behind the 

 postocular row. Scutellum with crossed apical setae and subapicals not strongly 

 approximated. Pteropleural seta enormous, reaching back to level of the end of 

 the lower calypter. Ocellar setae very strong, much larger than the frontals 



JANTHINOMYIA Brauer & Bergenstamm 



- Bend of vein M with a well developed A/ 2 appendix. Abdominal sternites without 



spiniform vestiture. Two posthumeral setae. <$ frons very reduced, eyes strongly 

 approximated and inner vertical setae not clearly differentiated. Upper occiput 

 without black occipital setulae (at most with a few minute and inconspicuous dark 

 setulae). Scutellum without apical setae and subapicals unusually straight and 

 strongly approximated. Pteropleural seta much weaker, not surpassing the end of 

 the upper calypter. Ocellar setae weak . GYMNOCHETA Robineau-Desvoidy 



4 Epistome enormously produced, snout-like. Parafacials fully haired. Arista 



thickened on almost all its length, both basal segments greatly elongate. 2 + 3 dc 

 setae. No differentiated acr setae. Third antennal segment axe-shaped. 

 Scutellum without apical setae and with two pairs of lateral setae. Vibrissal angle 

 bearing a dense tuft of long setae amongst which vibrissae are not differentiated. 

 [Tibetan side of Mt Everest] E VERESTIOM YIA Townsend 



- Epistome not at all produced, invisible in profile. Parafacials bare or mainly so. 



Arista not noticeably thickened on most of its length, basal segments not elongate. 



