long and erect, but slightly curved below, the pubescence being longer 

 and more or less shaggy on and about the vertical space and almost 

 not occuring below the upper frontal callus ; there are four or five long 

 erect black bristly hairs near the eye-margins, although they are often 

 depressed ; frontal triangle short and rather broad, ashy grey except 

 on the yellowish double lunule just above the antennae, divided into 

 two lateral ones by a very fine longitudinal surcus which extends from 

 the transverse furrow between the lower frontal callus and the frontal 

 triangle to the upper groove of the face, passing through the very nar- 

 row space between the antennal bases, quite bare from pubescence. 

 Face dark yellowish grey, bearing on the cheeks moderately dense 

 somewhat long greyish white pubescence which becomes more denser 

 and longer below, and extends round the lower part of the back of 

 the head, and which becomes shorter above and is intermixed with 

 blackish hairs on the upper part and near the eye-margins ; epistoma 

 deeply hollowed in the middle through its length, bearing in- 

 conspicuous very short depressed greyish pubescence ; side -pits rather 

 large and deep ; jowls moderately prominent ; and all the lower part of 

 the back of the head slightly inflated ; pubescence on the back of 

 the jowls and all about and behind the mouth long somewhat shaggy, 

 mainly greyish yellow; back of the head with a narrow ashy grey bare 

 rim which is only slightly widened on the extreme lower parts and 

 behind the rim lies a short black ciliation which grows longer on the 

 upper part but it does not merge into the lower black pubescence 

 about the vertex. Proboscis dark brownish black, thick and shorter 

 than the depth of the head, bearing a few shorter erect blackish pu- 

 bescence behind, the pubescence on the sucker-flaps below thinner and 



? 

 rather sparser than that on the stalk ; palpi about two-thirds as long 



as the proboscis, rather slender, greyish yellow with a blackish tinge; 



first joint somewhat conspicuous, greyish black, clothed with long black 



bristly hairs which become longer and yellowish grey below ; second 



joint rapidly bent below at the apex of about the basal one-third 



