a new Genus and eight new Species of Diptera. 515 
proboscis of remarkable structure, and different thoracic 
chaetotaxy and costal lobe. 
®. Head rather wider than thorax. Eyes microscopically 
pubescent. Frons almost a third the width of head, parallel-sided, 
brownish, and dull on the broad central stripe and at vertex, more 
greyish and slightly shining on the narrow orbits next to eye- 
margin. Chaetotaxy as in other species. Frontal lunule small, 
shining, the usual pair of bristles very short and fine. Face only 
slightly narrower than frons, longer than in any of the other species, 
flat and dull greyish. Cheeks rather distinct, of almost equal width 
throughout and merging into the jowls which become very narrow 
at lower margin of eyes. No distinct vibrissae—only a row of short 
fine hairs. Antennae placed very close together at base, first 
joint very short, indistinguishable on the outer side but visible: 
as a ridge on the inner and lower sides; second joint long, dull 
brownish black, almost as long as the third joint which is rounded 
in outline and strongly compressed laterally; inner side of second 
and third joints clothed with a curious soft fine curved pubescence ; 
third joint yellowish brown at least about the base. Arista micro- 
scopically pubescent, second joint long. Palpi greyish brown, of 
almost equal width throughout and laterally compressed, closely 
approximating at the upper mouth-margin and then widely diverg- 
ing, .this diverging portion being somewhat concave on the inner 
side; the margin of this concave part and the whole of the lower 
side of the palpi clothed with similar soft fine curved pubescence 
as on inner side of antennae. Proboscis geniculate, the basal part 
much flattened, bare on the central part but clothed with short dark 
hairs at the sides, terminal part (paraglossae) of a curious shape, 
compressed laterally and bearing on the upperside towards tip some 
remarkable long bristly hairs. 
Thorax rather dull brown with an aeneous tinge; pleurae dusted 
greyish. Chaetotaxy as in the other species except for the absence 
of the posthumeral, supra-alar (as distinct from postalar) and central 
prescutellar, bristles. Abdomen brilliantly shining black except 
on the first segment and a large dull greyish patch occupying the 
greater part of disc of second, and (to a rather less extent) of third 
segment; the moderately short black hairs, scattered, not very 
numerous, and more upright on fifth segment. 
Legs black with the tip of anterior tibiae and all tarsi (except for 
the last joint or two) yellowish, but the front tibiae are brownish 
yellow on basal part, and the hind tarsi are rather brownish on the 
basal joint. Hind tibiae with a rather sinuous antero-dorsal ridge, 
behind which is a flattened and slightly concave space, brilliantly 
