i 4 R. W. CROSSKEY 



genus closely resembles Palpostomatini and may be wrongly placed in 

 Dufouriinae.] 



- Forms without such characters present simultaneously, usually failing on several 



of them together TACHININAE (large part) (p. 53) 



[This is an important point of the key as at this exit run out all Oriental forms 

 that simultaneously possess conspicuously hairy eyes and a bare prosternum 

 except for Kambaitimyia separated above] 



13 Presutural seta and all intra-alar setae absent simultaneously. Abdominal dorsum 



without any differentiated setae, the vestiture consisting solely of short fine hairs 



(at most only some of the tergite marginal hairs longer than the rest) . . . 14 



- Presutural seta present (sometimes very weak) and at least one intra-alar seta 



present. Abdomen nearly always with some setae clearly differentiated from 



the hairing (except sometimes in Phasiinae) . . . . . . . 15 



14 Thoracic surface entirely microrugose. Legs with very short uniform hairing and 



almost no differentiation of setae except at the tibial apices. Scutellum with 

 one pair of marginal setae inserted on prominent pores or on thumb-like processes, 

 the outline of the scutellum appearing to have posterolateral 'corners' where 

 the pores are situated and the middle part of the margin usually straight across 

 between the pores (small second pair of setae present in one species). [Hosts 

 unknown] ..... Germariochaetini (Tachininae, part) (p. 80) 



- Thoracic surface not microrugose (but punctate on the dorsum and especially the 



scutellum in some forms). Legs with some fine setae, spinules or long strong 

 hairing clearly differentiated (especially on femora). Scutellar setae varied and 

 sometimes hair-like but not inserted on prominent pores, the outline of the 

 scutellum evenly curved or slightly subtriangular and without trace of postero- 

 lateral 'corners'. [Parasites of Hemiptera] . Phasiini (part) (Phasiinae, part) (p. 18) 



15 Forms with the following characters present simultaneously: one supra-alar seta; one 



intra-alar seta (the hindmost post ia) ; arista bare (at low magnification) ; ptero- 

 pleural seta absent or very weak ......... 16 



- Forms without such characters present simultaneously, failing on at least one 



and usually at least two of the characters cited . . . . . . 17 



16 Scutellum with two pairs of marginal setae. Parafacials bare. Antennae as long 



as or longer than the depth of the gena. (J head not holoptic and with eye 

 facets of uniform small size. [Parasites of Hemiptera] . PHASIINAE (part) (p. 16) 



- Scutellum with three pairs of marginal setae. Parafacials with stiff hairs. Antennae 



extremely small, shorter than depth of the gena. (J head holoptic and with the 

 facets of the uppermost two-thirds of the eyes enlarged. [Parasites of adult 

 Scarabaeoidea (Coleoptera)] . . Palpostomatini (part) (Tachininae, part) (p. 57) 



[At this exit runs out the phasiine-like genus Eutrixopsis] 



17 Forms with the following characters present simultaneously: arista plumose; gena 



very large in relation to the eye, its depth as great as the length of the third 

 antennal segment or of the whole antenna; antennal axis at or (usually) below 

 level of eye-middle (e.g. Text-fig. 29) ; rows of frontal setae descending only as 

 far as lunula; parafacials bare; pteropleural seta present; scutellum with three 

 pairs of marginal setae, basals, subapicals and strong crossed apicals (Text-fig. 75) 

 (except in Doleschalla with apicals missing or very weak) ; wing veins bare (basal 

 node of R i+5 excepted); lower calypter broad and with prominent inner posterior 

 angle abutting to scutellum; fore coxa bare on inner anterior surface; abdominal 

 Ti + 2 excavate to its hind margin (except Doleschalla) ; intermediate abdominal 

 tergites without discal setae (except in Dolichodexia) [Parasites of larval 

 Scarabaeoidea (Coleoptera), genus Doleschalla also attacking Hepialidae (Lepidoptera)] 



PROSENINAE (DEXIINAE) (part) (p. 43) 



- Forms without such characters present simultaneously. [Not parasites of larval 



