Syiphus. 319 



parallel-sided : it may sometimes be a little broader and a little 

 widening backwards; it is dull black, shining just at base and apex; 

 there are a pair of yellow basal spots and two bands; the basal 

 spots are large, at the sides stretching from the basal corners to near 

 the hind margin and going in on the disc as very blunt triangles but 

 vvidely separated; the band on third segment oceupies about the half 

 of the length, it lies near the front margin; it is more or less but 

 generally only slightly emarginate behind and often again a little pro- 

 duced in the middle of the emargination ; it is likewise generally a 

 little produced in the middle of the front margin ; the band on fourth 

 segment is similar but nearer the front margin. The bands go over 

 the side margin, the basal spots generally only at the upper corners; 

 the fourth segment has a yellow hind margin, the fifth has the front 

 margin yellow or is quite yellow with a black middle spot ; the hind 

 margin of fourth and the front margin of fifth segments form together 

 a third band. The hairs on abdornen not long, they follow partly 

 the ground colour but along the middle are not few black hairs, and 

 fourth and fifth segments are almost quite black-haired ; at the sides 

 the hairs are long and yellow on the basal part for the rest altern- 

 ating black and yellow, but there are generally no black hairs at the 

 hind corners of second segment. Venter yellow, as far as I could see 

 without markings; when dark markings seem to be visible it is only 

 the dorsal markings which shine through; the venter has long, pale 

 hairs, at the apex shorter, dark hairs. Genitalia relatively large, reddish, 

 eighth segment a little black behind on the right side ; the hairs black. 

 Legs slender, yellow, anterior femora quite yellow or more or less 

 blackish at or near the base^ hind femora black with the base more 

 or less broadly yellowish and the apex yellowish; hind tibiæ blackish 

 with the basal part and the apex more or less pale, often only slightly, 

 hind tarsi blackish. The long hairs on femora are yellow on the 

 basal, black on the apical part, on the front femora only few black 

 hairs or none at all; the short hairs are black on the anterior side 

 of hind femora, and almost all on hind tibiæ, for the rest yellow ; 

 hind tibiæ with an antero-dorsal fringe, somewhat long about the 

 middle. Wings slightly brownish tinged. Squamulæ and balteres 

 yellow. 



Female. Vertex not broad, a little shining, for the rest the 

 frons yellowish pruinose, with a black, shining, semicircular spot as 

 in the male; the hairs dark. Abdomen with the basal spots more 

 quadrate, lying close to the front margin, and often also the first 

 segment yellow; the bands more straight than in the male, not 

 emarginate but often a little produced in the middle behind. Legs 



