291 



sides of the median triangles on the first to fourth segments; the 

 sides of the basal two segments broadly paled and covered with 

 paler and longer pubescence, those of the remaining segments more 

 or less paled and furnished with yellow pubescence. Ventre paler 

 than the dorsum, with the posterior part much paler but the large 

 median part conspicuously darker partly owing to that it is covered 

 with tiny black pubescence ; pubescence mainly pale yellowish white 

 especially on the hind margins of the second to sixth segments cons- 

 picuously yellow, but intermixed with black hairs about the large median 

 area or almost whole the surface ; the seventh segment furnished with 

 stout and long curved black bristly hairs almost all over the surface. 



Length : 18-20 mm. 



Male. More slender than the female, and much redder in 

 colour, the median spots on the abdomen are smaller and the fore 

 tibiae dull yellowish or obscurely red at the base with only a few 

 lighter hairs. 



Head larger than in the female, being so much more rounded 

 anteriorly that it forms almost a semicircle, and slightly broader than 

 the thorax. Frontal triangle flat, rather smaller and sharply extending 

 up between the eyes, covered with pale yellowish tomentum, which is 

 quite absent about the upper third where is dull reddish brown, the 

 'median sulcus distinct on the lower half, this triangle separated from 

 the cheeks by distinct and deep but very fine sulcus which is hardly 

 reaching the eye-margins. Face rather small, clothed with dense yel- 

 lowish grey tomentum which becomes paler on the epistoma ; cheeks 

 broad and moderately inflated, almost equal in width throughout, covered 

 with rather dense soft pale brownish yellow pubescence which grows 

 up considerably longer and shaggier and much deeper clour on the 

 jowls, and then extends up a little to the back of the head ; epistoma 

 quite sunken as usual, bare from pubescence. Back of the head hol- 

 lowed out especially about the upper half, with a very fine inconspicuous 

 yellowish postocular bare rim which is nearly absent on the upper part, 



