TACHINIDAE OF AUSTRALIA 35 



abdominal base, posteroventral declivity of the thorax membranous medially or more weakly 

 sclerotized medially than elsewhere; abdomen rounded, subovate or subconical and usually 

 conspicuously flattened dorsoventrally; Ti + 2 excavate only at extreme base (sometimes 

 virtually no excavation) ; abdominal bristling often weak or absent ; £ hypopygium recurved 

 under abdomen, $ ovipositor usually prominent and piercer-like; sternites fully exposed. 



Key to Australian Genera of PHASIINI 



Femora armed on half or more of their length with stubby black spinules on av and 

 pv surfaces. Pteropleuron with a moderately strong isolated pteropleural seta. 

 Vibrissae strong EFFTAYLORIA Malloch 



Femora without such spinules, vestiture of the ventral surface entirely hair-like. 

 Pteropleuron haired and without a pteropleural seta (at most only one of the 

 uppermost hairs longer and stronger than the others). Vibrissae hair-like or at 

 most only weakly differentiated from peristomal vestiture ..... 2 



Eyes of both sexes very strongly approximated or completely meeting in the mid- 

 line of the frons, interfrontal area obliterated medially or if distinguishable 

 distinctly narrower at mid point than third antennal segment. Upper eye facets 

 in both sexes sometimes much enlarged compared to lowermost facets (reaching 

 nearly the size of an ocellus). Antennae small, third segment conspicuously less 

 than twice as long as second segment and falling short of epistomal margin by a 

 distance as great as its own length .... ALOPHORA Robineau-Desvoidy 



Eyes widely separated in both sexes, interfrontal area broad and at least nearly 

 twice the width of the third antennal segment. Eye facets of both sexes of 

 almost uniform small size. Antennae moderately large, third segment conspi- 

 cuously more than twice as long as second segment and falling short of epistomal 

 margin by much less than its own length .... BESSERIOIDES Curran 



Key to Australian Subgenera of ALOPHORA 



Lower parafrontals with some fine hairing between the main frontal row of inter- 

 mixed fine setae and hairs and the eye. Wing with petiole of cell i? 5 conspicuously 

 shorter than m-cu and less than twice as long as r-m. Mesonotum with broad 

 black vittae contrasting with paler greyish or sometimes partly golden pollinose 

 areas (either four separated vittae or the inner pair merged into a generally dark 

 median area). Scutellum with two pairs of marginal setae (basals and apicals) . 2 



Lower parafrontals completely bare between the main frontal row and the eye 

 (frontal row may consist of an admixture of fine setae and long hairs standing 

 very slightly out of line with each other but essentially forming one main row of 

 vestiture). Wing with petiole of cell i? 5 very long, at least as long as m-cu and 

 more than twice as long as r-m (except in A. hippobosca). Mesonotum rather 

 uniformly black and shining, or if partially paler pollinose then not distinctly 

 vittate. Scutellum with either one (basal) pair of setae or with two pairs . . 3 



Epistome distinctly projecting, curving forwards from the facial region and the 



facial profile therefore distinctly concave . . subgenus ALOPHORELLA Townsend 



Epistome not at all projecting, in the same straight plane as the face when seen in 



profile (fig. 3 in Malloch, 1929a) . Alophora nigrisquama (subgenus uncertain) 



Scutellum with two pairs of marginal setae (basals and apicals), and with uniform 

 fine semi-recumbent hairing on the whole upper surface. Postscutellum evenly 

 rounded and not, or only just, visible when fly viewed from directly above 

 (Text-fig. 66). £ thorax entirely without flattened lanceolate or scale-like hairs 

 or setae. Scutellum concolorous dark brown or black when seen from any angle, 



