390 NEW SPECIES OF DIPTERA FROM WESTERN AUSTRALIA. 



mentioned by Van der Wulp in his recent Catalogue of the 

 Diptera of South Asia. 



Myiophasia flava, n.sp. 



Yellow, the hairs and bristles chiefly black, a medio-dorsal 

 brown vitta on the abdomen; eyes of male separated about the 

 width of the lowest ocellus, antenna? reaching five-sixths of 

 distance to the oral margin, the third joint slightly more than 

 thrice as long as the second, the lower front corner produced in 

 the form of a blunt tooth, arista thickened on the basal two- 

 fifths ; mesonotum somewhat polished, marked with five grey 

 pruinose vittae, three pairs of postsutural dorsocentral macro- 

 chsetse, two marginal pairs on the scutellum, sternopleura bearing- 

 two macrochsetaa, abdomen subopaque, bearing only marginal 

 macrochajtaa; wings hyaline, third vein bristly about half-way to 

 the small cross-vein, hind cross-vein nearer to the latter than to 

 bend of fourth vein, first posterior cell petiolate, the petiole 

 about half as long as the hind cross-vein. Length 5 mm. 



Hab. — West Australia ; two males bred from adults of the 

 Scarabreid, Anoplostethus opali/ms, Burm. 



Although aberrant in its colouring, this interesting species 

 possesses practically all the structural characters of the type 

 species of the genus Myiophasia ; the two heretofore known 

 species of this genus likewise prey upon beetles. There is a 

 strong probability that the present species is congeneric with 

 Keojihasia picta, Brauer and Bergenstamm, founded on a female 

 specimen, without antennae, from West Australia ; this latter 

 generic term, however, cannot stand, since there is a much earlier 

 use of the same name by Dr. Behr for a genus of butterflies. 



