Helophilus. 4 57 



yellow; it is clothed with dense, somewhat long, yellow hairs. Scutel- 

 lum yellovvish with yellow hairs, mixed with soine few black. Pleura 

 yellowish grey or grev pruinose, with long, yellow hairs. Abdomen 

 duU black, first segment with a large grey lunule, nearly occupying 

 the whole segment, sometimes with indications of a dlviding in the 

 middle, the other segments with dark orange hind margins ; second 

 segment with large, triangular, yellow side spots, at the sides nearly 

 occupying the whole length of the segment but not reaching the orange 

 hind margin; in the middle of the hind margin is a small, transverse, 

 yellow or greyish pruinose spot; third segment with similar spots, 

 likewise not reaching to the orange hind margin, at the inner end 

 each has a transverse, oblong, yellow or greyish pruinose spot, the 

 two spots approximated in the middle; at the hind margin is in the 

 middle a somewhat large, triangular, greyish or yellow pruinose spot; 

 fourth segment almost quite greyish or yellow pruinose, darker in 

 front of the orange hind margin; in the middle there is a shorter or 

 longer, black longitudinal stripe from the front margin, and the front 

 margin mav be narrowly black or only towards the sides ; there may 

 also be smaller or larger, more or less distinct blackish spots to each 

 side in front of the orange hind margin. Abdomen is clothed with 

 somewhat long hairs, they are yellow but black at the hind margins 

 of third and fourth segments and a few at the hind corners of second 

 segment. Genitalia large, yellowish or greyish pruinose, with yellow 

 hairs. Venter grey or blackish grey, somewhat shining, the genitalia 

 of the same colour or paler to yellowish ; the side-membrane pale ; 

 the venter has lopg, pale hairs but only at the sides, along the middle 

 it is bare and rather shining. The genitalia are, when seen from 

 below, very large with large, curved, reddish, claw-shaped terminal 

 appendages. Legs with the femora black, anterior femora with the 

 apical third or nearly the half yellow, hind femora with a yellow ring 

 just before the apex; anterior tibiæ and tarsi yellow, the front tibiæ 

 with a dark stripe below on the apical part; hind tibiæ yellow with 

 the apical third black, hind tarsi yellow, darkened towards the apex 

 or quite black; the hind femora have below near the base towards 

 the posterior side a tubercle or process, bearing at the end a bundle 

 or fan of black, bristly hairs. The legs haired as usual, the hairs 

 somewhat long on femora and also behind anterior tibiæ and below 

 the hind tibiæ ; the hairs are mainly yellow, below the front femora 

 some black may be present, especially at the apex; also the anterior 

 tibiæ may have some single black hairs ; the hind femora are black 

 spinulose below, and the long, scattered hairs may be black. Wings 

 hyaline or slightly yellowish tinged. Stigma quite small, consisting 



