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 Baranoyv 
~— 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 Amphitropesa, 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 Chlovotachina 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 za 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 17, 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 
1 Eyes densely haired. Presutural acrostichal setae well developed. Prosternum 
haired (except in occasional specimen of Macrochloria). Wings clear hyaline : 2 
— 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 : : : : 3 

