41 



length : 8. 5-1 1 mm. 



Male usually about same in size, with larger head and with 

 darker legs. Head conspicuously broader than the thorax Frons very 

 small, dark brown, shining but slightly covered with a greyish dust, 

 quite bare from pubescence, with rather prominent antennal tubercle 

 which is paler and much conspicuously dusted. Face less convex and 

 conspicuously less produced below at the mouth part ; the intermedial 

 yellow line broader, reaching to the upper edge of the mouth, and 

 oral callus consequently divided into two lateral ones ; the lateral yellow 

 bands broader, somewhat triangular and short, with much horizontal 

 lower margin ; facial calli much darker and almost entirely black at 

 the outer half, hardly touching to the eye-margin only leaving a very 

 inconspicuous yellow line which is extending from the large yellow 

 lateral bands ; buccal calli somewhat smaller and paler towards the 

 mouth edge ; pubescence much longer and much numerous, yellowish 

 on the facial and oral calli very short and fine, sparse, whitish, but 

 quite bare just below the antennae ; jowls black but sometimes some- 

 what yellowish brown towards the mouth-edge, slightly shining but 

 moderately covered with a greyish dust, furnished with somewhat 

 tawny rather yellowish hairs, which become shorter and less denser at 

 the black of the head. Vertex small, triangle, prominent, black, some- 

 what obscured with a yellowish dust, bearing a few long curved 

 blackish pubescence at the sides between the ocelli especially behind, 

 the pubescence on the centre very short and sparse ; ocelli usually 

 ruby-red. Back of the head conspicuously concave, black, almost 

 entirely obscured by a yellowish tomentum, furnished with very short 

 pale hairs. Proboscis usually thinner than in the female and much 

 shorter than the depth of the head ; palpi shorter and stouter, about 

 half as long as the proboscis, brownish yellow at the basal joint, and 

 elevated at right angle to the proboscis ; pubescence much longer and 

 much numerous, on the upper surface about twice as long as that on 

 the other surfaces. Eye quite bare, touching for more than middle 



