56 R. W. CROSSKEY 



1 6 Palpi fully developed, longer than third antennal segment. Three or four post dc 



setae. Bend of vein M strongly angulate but usually without M.^ appendix 

 (appendix present in Gymnocheta) . Prosternum bare or with some soft hair. 

 [Forms often with metallic coppery, green or blue-violet colouring] ERNESTIINI (p. 95) 



- Palpi very small or almost completely vestigial, much shorter than third antennal 



segment. Three post dc setae. Bend of vein M with a well developed M 2 

 appendix. Prosternum bare. [Forms without metallic colouring] 



LINNAEMYINI (p. 98) 



17 Eyes densely haired (hairing long and conspicuous) . . . . . . 18 



- Eyes bare or almost so (some very sparse and minute hairs occasionally present) . 19 



18 Parafacials completely haired. Scutellum with three pairs of marginal setae. 



Second costal sector haired ventrally. Three or four post dc setae 



MACQUARTIINI ( p . 8 5 ) 

 [The hairy-eyed species Gibsonomyia annularis (Villeneuve) (tribe Phyllomyini), 

 known only from southern China, will also run out at this point.] 



- Parafacials bare or almost completely so (at most some hairs on the upper parts 



adjacent to the lower ends of the frontal rows). Scutellum with four or more 

 pairs of marginal setae. Second costal sector bare ventrally. Three post dc 

 setae ERNESTIINI (part) (p. 95) 



19 Palpi absent (Eloceria) or arista with both basal segments greatly elongate (Text-fig. 



44) and thickened on almost all its length (Trichactia). Scutellum with very 

 strong crossed apical setae that are larger than the (unusually weak) subapical 

 setae, and with a pair of discal setae. Bend of vein M much nearer to r-m than 

 to the bend. Face strongly excavate, the facial profile deeply concave immediately 

 above the vibrissa (Text-fig. 44). Hind tibia with pv apical seta. Both sexes 

 with broad frons and outer vertical setae. Genal depth half eye-height (Text-fig. 

 44) or almost so ELOCERIINI (p. 84) 



- Palpi present and arista with basal segments not elongate. Scutellum with or 



without apical setae, if strong crossed apicals present then very strong subapicals 

 present that are larger than the apicals; discal scutellar setae absent (except in 

 Glaurocarini and rarely elsewhere). Bend of vein M nearer to the bend than 

 r-m or about equidistant between the two (nearer r-m in a few exceptions). Face 

 flat or weakly excavate, the facial profile straight or only slightly concave above 

 the vibrissa. Hind tibia usually without pv apical seta. $ frons usually much 

 narrower than that of $ (o* eyes often very strongly approximated) and usually 

 without outer vertical setae. Genal depth nearly always much less than half 

 eye-height ............. 20 



20 Abdomen rotund and with the sutures between the tergites largely obliterated by 



fusion dorsally (Text-fig. 116). Fore tibia with strong irregular ad setae along its 

 length. Scutellum with discal setae and with four or more pairs of irregular 

 marginal setae. Abdominal base and metacoxae very close together. Arista 

 pubescent. [Forms with entirely reddish yellow, or reddish yellow and brown 

 colouring, short bristly yellow legs, and rather large wings.] GLAUROCARINI (p. 64) 



- Abdomen elongate-ovate, fusiform (e.g. as Text-fig. 109) or subcylindrical, almost 



always with the sutures between the tergites distinct. Fore tibia without ad setae 

 or with some very small inconspicuous ad setulae (except more definite row of 

 small setae in Actinochaetopteryx : ? also Thryptodexia). Scutellum almost always 

 without discal setae and with not more than three pairs of marginal setae (except 

 in Xanthopteromyia) . Abdominal base and metacoxae often widely separated (the 

 posteroventral declivity of the thorax sometimes forming a deep fully sclerotized 

 bridge). Arista usually either distinctly plumose or almost bare. [Forms not 

 so, often mainly or wholly black, if rather similarly coloured then other characters 

 not fitting.] ............ 21 



21 Parafacials haired PHYLLOMYINI (p. 69) 



