392 Mr. C. G. Lamb on 



rather irregular post-orbital row are visible, and are continued by 

 2 or 3 small bristles behind the hind verticals. 



Front view : — vertex arched with no sign of any hump ; eyes 

 slightly prominent; mouth edge straight with about 5 long stout 

 fringing bristles each side ; the nose starts with a silver base level 

 with second antennal joints, and suddenly becomes prominent at 

 that point, it then widens, and sweeps each side into the mouth 

 margin, it is mainly orange but grades into the grey mouth margin ; 

 the nose bears a diverging row of 4 bristles each side and has much 

 smaller scattered ones on its surface; the lines of main bristles 

 curve round so that the very large bristles on the cheeks below the 

 antenna form their terminations. The whole face is distinctly 

 pollinated. The antennae being turned rather sideways beside the 

 nose are best seen in this view, the first joint forms a small elongate 

 knob embracing the base of the second joint; this is oval, smooth, 

 with a few small bristles on the surface and a long dorsal one ; the 

 visible part of the third joint is also oval, densely but obscurely 

 pilose and darkened at tip ; otherwise the whole antenna is orange. 

 The arista is thick at base, then tapered, with about 7 feathers ; its 

 whole length is a little greater than the whole antennal length. 



Side view : — the greatly protuberant nose is very evident, as is 

 the deep antennal groove, and a deep furrow in front of the eye, 

 with a long facial bristle forward of it. The eyes are oval, with 

 the longer axis oblique and sloping downwards from behind to 

 front : the boundary is regularly curved, the upper margin with a 

 shorter radius than the lower : the ends of the longer axis also 

 smoothly curved, the upper having larger radius than the lower. 

 The whole of the side of the face is grey with some silvery pollen. 

 The hind jowls towards the back of the head carry many palish 

 decumbent bristles, longer below. The post-orbital bristle-row 

 extends halfway down, and there are a few accessory bristles 

 behind it. It can be seen that the second antennal joint is rather 

 swollen and is practically smooth behind. The lower lip is grey, 

 swollen and hairy, and the ridged orange tongue protrudes from 

 it : the palpi are orange, stout, rather flattened in the vertical 

 plane and bristled. On looking into the mouth, the true lip is 

 seen to be cut off from the outer mouth margin by a deep encircling 

 furrow. 



Thorax : — the general colour is silvery grey, due to very minute 

 dense pollen, with very faint bluish and bronzy reflections; there 

 are rather irregular rows of small bristles, some of which form the 

 irregular double acrostichal rows, others the dorso-centrals; in the 

 latter the presutural and prescutellar dorso-centrals are true macro- 

 chaetae. There are two or three small numerals, a bristle (pre- 



