Mr. J. R. Malloch on Exotic Muscaride. 273 
posterior bristles ; hind femur with a complete series of 
antero-ventral bristles and a series of finer bristles on basal 
half of postero-ventral surface ; hind tibia with one or two 
antero-ventral, two antero-dorsal, and two postero-dorsai 
bristles. Outer cross-vein much curved. 
Female.—Frons a little less than one-third of the head- 
width, orbits narrow. Mid and hind femora lacking the 
postero-ventral series of fine bristles. 
Length 7-8 mm. 
Type, male, and allotype, Victoria, Australia (C. French). 
Genus Dimorpaia, nov. 
Generic characters.—Similar to Muscina, R.-D., in general 
habitus. Prosternum, pteropleura, hypopleura, declivous 
postero-lateral part of mesonotum, and ventral surface of 
scutellum bare. Cephalic characters as in Helina, R.-D. 
Arista plumose. Hind tibia without ealcar on postero-dorsal 
surface and no setulz on that surface. Anterior intra-alar 
bristle present but weak in female, absent in male; scutellum 
elongated, subtriangular; prealar short, but strong. Abdomen 
ovate. Base of auxiliary vein, stem of veins 2+8 above and 
below, and vein 3 for a variable distance beyond the furcation 
setulose in both sexes, and fourth vein setulose on the 
greater portion of its length above and below in female, 
rarely sparsely setulose in male; fourth vein distinctly 
curved forward at apex. 
Genotype, Cyrtoneura flavicornis, Macquart. 
One other described species known to me, Anthomyia 
tristis, Wiedemann (Spilogaster latevitiata, Bigot, Anthomyia 
subpunctata, Walker), belongs to this genus. It has the 
antenne and palpi black or fuscous, while flavicornis has 
both yellow. 
Stein lists four species with the name flavicornis in his 
composite genus Mydea in his recent catalogue of the 
world’s species of Anthomyiidee. Not one of the species so 
listed was described in that genus, and but one, flavicornis, 
Coquillett, belongs to the genus Mydea in the strict sense. 
I have before me specimens of ¢risfis from British East 
Africa and Natal, and of flavicornis from the same localities 
and from north of Mt. Kenia. 
In addition to the foregoing I have what appears to be an 
undescribed species of the genus, closely related to flavi- 
cornis, which is briefly characterised below. 
