$94 Mr. C. G. Lamb on 



Head : top view : — shape and general character like the last 

 species, but the whole is dark blackish brown, the eye margin 

 being somewhat more brown : the central area is scarcely differen- 

 tiated irom the rest. The chaetotaxy is the same, though stouter. 



Head : front view : — same as last, but the colour is altogether 

 darkened grey, much less orange. The antennae are similar, but 

 ochreous grey in colour, the 3rd joint being quite grey. 



Side view : — much as last, but there is no very evident furrow 

 behind the cheek-bristle : the sides are grey and silvery, and the 

 hind jowls bear short black bristles. The remainder of the side is 

 much like the last species, but the orange colour is far less distinct. 

 The eyes slope similarly, but they are somewhat different in outline, 

 being rather pointed below in front, the radius of curvature of the 

 boundary being very small. 



Thorax : — the general colour is dull brown-black, the upturned 

 notopleurae are orange, so that they form two irregular orange side 

 stripes. The small dorsal bristles are arranged somewhat like the 

 last, but much longer and more evident. The dorso-central rows 

 are more marked, as there is a mid-bristle pair as well as the front 

 and hind pairs : the other bristles are the same, but longer and 

 stouter. The scutellum is similar, and bears two very long upright 

 crossed bristles and the usual two snifiil accessory side ones. The 

 pleura is darkened orange, bristled as last. 



The wings are reduced to hairy strips, they are proportionately 

 a little longer than in the last species, being about equal in 

 length to two-thirds the distance from the root to the humerus. 



The legs are similar to the last, darkened orange and a little 

 more stoutly haired. 



The abdomen : this shows a striking difference in colour, etc. : 

 it is all very dull dark black-brown, almost black; it is uniformly 

 and densely covered with tiny adpressed bristly hairs. In outline 

 the shape is similar to the last, being widest at the end of the 2nd 

 segment. The 1st, 2nd and 3rd segment have their axial length the 

 same; the 4th is about twice as long. The last is only just visible 

 dorsally, but on side view it is seen to be long and rather narrow, 

 its axis being about GO to the body axis. This segment ends in a 

 papilla bearing a bunch of orange hairs, at the base of the 4th 

 segment are two strong chitinous hooks. If the 5th segment be 

 viewed from behind, it is seen to bear a rounded triangular patch 

 which is paler haired, and is well marked off from the rest by a 

 definite sunk boundary : it looks like a little segment glued on 

 to the 5th. In the first species these structures cannot be seen as 

 the whole apparatus is withdrawn in all three specimens. 



The female differs from the female of the last species in the 



