70 R. W. CROSSKEY 



Guinea, none of which correctly belongs in the genus Rhinomyobia. There appears 

 to be no described genus to which these species can be correctly assigned, and a 

 new genus will probably be needed for their appropriate placement.] 

 9 Mid tibia with two ad setae. Legs and palpi dark brown. [Solomon Islands] 



BEZZIOMYIOBIA Baranov 

 - Mid tibia with one ad seta. Legs (except tarsi) and palpi reddish yellow. [India & 



Queensland] DEMOTICOIDES Mesnil 



[This genus is so similar to Bezziomyiobia that the name ought perhaps to be 

 treated as a synonym.] 



Tribe ERNESTIINI 



Four endemic Australian genera are here placed in this tribe, but it is doubtful 

 whether the placements of two of them, Neximyia and A mphitropesa, will be upheld 

 by further work. The affinities of these two genera are very obscure, and the fact 

 that they are so far known only from very few female specimens makes it specially 

 difficult to determine their true relationships; Neximyia at least appears to be 

 rightly placed in the Tachininae, and probably does truly belong somewhere near 

 the ernestiine-linnaemyine complex, but Amphitropesa is much more problematical 

 and may not really belong in the Tachininae at all (its total facies, much reduced 

 dorsal thoracic bristling, and stongly clubbed female palpi give it some resemblance 

 to certain Proseninae). 



The placement of Chlorotachina in Ernestiini appears to be almost certainly correct. 

 In all its characteristics it conforms to the Ernestiini as the tribe is recognized 

 in the Eurasian fauna, and the dark metallic blue-black or metallic greenish blue 

 appearance of most forms conforms with that of similar metallic forms in the 

 Palaearctic Region. The genus Macrochloria, although not immediately obvious 

 as an ernestiine, is best placed in the Ernestiini as its characters closely accord 

 with those of Chlorotachina. 



The main characteristics by which Chlorotachina and Macrochloria concur with Eurasian 

 Ernestiini are as follows: epistome very prominent, vibrissae inserted well above epistomal 

 margin; parafacials bare; palpi moderately well developed; eyes densely long-haired; three 

 postsutural ia setae (cf. Parerigonini) ; scutellum with four pairs of very strong marginal setae; 

 mid tibia with more than one ad seta and both sexes with a v seta (^ lacking a v seta in typical 

 Parerigonini) ; hind coxa bare posterodorsally ; wing with bend of vein M very sharp and 

 provided with at least a trace of an M 2 stump or spur vein. 



The genera Neximyia and Amphitropesa, here placed as a temporary measure in 

 this tribe, do not conform with all of these characteristics, as will be evident from 

 the following key to genera. 



Key to Australian Genera of Ernestiini 



Eyes densely haired. Presutural acrostichal setae well developed. Presternum 

 haired (except in occasional specimen of Macrochloria). Wings clear hyaline 



Eyes bare (some very sparse short macroscopic hairs may be visible under high 

 power). Presutural acrostichal setae absent or hair-like. Prosternum bare. 

 Wings with the membrane partly brown and partly yellow .... 



