16J» 



very narrowly but obviously yellow, clothed all over with very short 

 adpressed yellow pubescence except about the base where the pubescence 

 is longer and not adpressed ; the sides of the three basal segments 

 broadly dull orange though separated from the sidemargins of the second 

 and third segments by large or small blackish side-marginal spots ; the 

 flattened seventh segment with abundant longer erect but curved black- 

 bristly hairs about the large middle which slightly extend up to the 

 sixth segment and which sometimes are not conspicuous. 



Length : I 3 . 5 - 1 5 . 5 mm. 



Male. Altogether more paler than the female. Head very much 

 arched, considerably wider than the thorax, and more or less larger 

 than in the female. Frons pale greyish yellow, quite bare, depressed 

 for a large central space, with a distinct narrow longitudinal furrow 

 through the whole length, which is often inconspicuous at the depressed 

 space. Face pale greyish yellow with a faint tinge of greenish grey, 

 bearing long abundant pale yellow white pubescence which becomes 

 much longer about the mouth and jowls, and which becomes sparser 

 and shorter at a large part of the epi stoma and almost bare at its 

 middle and upper parts ; cheeks broad, moderately puffed out of the 

 eyes ; epistoma sunken between the cheeks, narrowed above, the 

 distance between the pits about as wide as the cheek ; back of the 

 head ashy grey but near the eyemargin somewhat yellowish deeply 

 hollowed out behind the eyes and with only a microscopical brownish 

 yellow postocular fringe ; vertex greyish yellow with its point blackish, 

 small but distinct, and with some distinct though short pale yellow 

 pubescence on and just behind it. Proboscis small but apparently longer 

 than the epistoma, blackish grey with deep brownish black sucker-flaps 

 which bear a few distinct though short blackish bristles on the lower 

 surface ; palpi long but about half as long as the proboscis, yellowi^i 

 white with the basal joint at the outer side blackish ; second joint 

 elongate elliptical and fairly pointed, and clothed with numerous short 

 sloping black bristles on all the out^rside except towards the upper part 



