Sphegina. 37 1 



VII, 109, 3. — S. flava iMacq. 1834. Suit. å Buff. I, 577, 4. — 1838. Meig. 

 1. c. VIII, 109, 4. 



Male. Vertex and frons greyish brown pruinose, especially down- 

 wards, Epistoma hollowed below the antennæ, with the front mouth 

 edge very protruding ; it is grey but the lower part more or less yellow 

 or whitish, the side mouth edge and the jowls black or blackish grey. 

 Vertex and frons with quite short, yellovvish hairs, epistoma, besides 

 the pruinosity, not haired. Occiput grey pruinose, with very short, 

 pale hairs. Antennæ with the third joint somewhat large, broadest 



Fig. 134. Antenna of S. clunipes cj", from the inside, x 65. 



towards the end ; they are brown or blackish brown, third joint some- 

 times paler; arista longer than the antennæ, a little pubescent. Thorax 

 black, somewhat shining, the humeri often brown; about the humeri 

 and in the præsutural depression somewhat pruinose; postalar calli 

 more or less brown; thorax is clothed with short, depressed, brownish 

 yellow hairs; scutellum with a pair of fine apical bristles. Pleura 

 black, a little pruinose, with quite short, pale hairs. Abdomen narrow 

 and clavate; it is black and shining, the base of the third segment 

 with a broad, reddish band, generally occupying about two thirds of 

 the segment; fourth segment with a narrow band at the base, or 

 with small basal corner spots; rarely the band on third segment 

 divided in the middle; the markings for the rest somewhat variable 

 and lighter or darker. Abdomen is clothed with short hairs, which 

 are mainly pale, but dark on the black part of third and on the disc 

 of fourth segment; along the sides at the base and the anterior 

 two thirds of the second segment they are long but not dense; the 

 large genitalia are pale-haired. Venter with the two basal segments 

 black, the two apical brown (the chitinised parts) ; the hairs short, 

 pale, at the slightly incised hind margin of fourth segment a small 

 tuft of longer hairs. Legs whitish yellow, hind femora black with 



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