Bombyliidae. 115 



black, the first two joints with black hairs; the third joint tapering 

 evenly into a styliform part, Thorax more or less covered with black, 

 in the middle with golden yellow, scaly hairs, and clothed with long 

 hairs which are mainly yellow, only just in the middle blackish or 

 brownish; in front they are denser and form the common fringe at 

 the front end; they are also somewhat dense at the lateral and hind 

 margins. Pleura with long, yellowish hairs, which are whitish further 

 down; metapleura with a vertical tuft of yellow hairs. Scutellum 

 with black, along the hind margin with yellow, scaly hairs. The 

 postalar bristles yellow, the scutellar marginal bristles black and 

 yellow. Abdomen with the ground colour blak, at the sides of the 

 first and second segments a reddish spot; the dorsal surface is covered 

 all over with black, scaly hairs, only at the sides on the second, 

 third and fourth segments there may be some yellow, scaly hairs, 

 but they form no bands; at most they may stretcli somewhat inwards 

 on the second segment and they are nearly quite hidden by the long 

 hairs; the abdomen is further densely clothed with long, yellow hairs 

 which are, to a more or less extent intermingled with black hairs on 

 the fifth and sixth segments, and sometimes these segments are very 

 extensively black haired; at the lateral margin of the abdomen the 

 hairs are fringe-like, on the fifth and sixth segments black, thus 

 forming two distinct, black tufts; at each corner of the seventh seg- 

 ment there is a large, white hair tuft. Venter covered with black 

 and, especially towards the hind margins of the segments, yellow, 

 scaly hairs and clothed with long, yellow hairs. Legs black; the hairs 

 and bristles black, the scaly hairs, especially on the femora, more or 

 less yellow, or sometimes whitish. The front tibiæ with small bristles. 

 Wings hyaline, brownish at the anterior margin. Costa with strong, 

 black hairs at the base, and at the root a fan-shaped patagium-like 

 piece covered with bright silverwhite scales. Squamulæ yellowish 

 with a pale yellow fringe ; frenulum with yellow hairs. Balteres pale 

 yellow, the knob nearly white, 



Female. The female differs somewhat from the male; the ver- 

 tex and frons are somewhat broader; the patagium-like piece at the 

 base of the wing is blackish or brownish, more or less intermingled 

 with white or yellowish hairs; but the greatest difference lies in the 

 colouring of the abdomen; this is, as in the male, covered with black, 

 scaly hairs, but there are transverse bands of yellow, scaly hairs at the 

 front margin of the second, third and fourth segments; the bands are 

 generally somewhat narrowed in the middle, and Ihat on the third 

 segment is the narrowest and sometimes somewhat indistinct; at the 



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