204 



Syrphidae. 



more or less blackened in the apical half, with long, pale hairs, short 

 on fourth segment. Legs black and yellow; front femora yellowish 

 on the anterior, black on the posterior side, but here yellow at the 

 base with about four, black, roundish spots, the apex yellow; middle 

 femora yellow, black below ; middle tibiæ black except base and apex, 

 middle tarsi blackish or brownish, especially below, with the apex of 

 the joints more or less pale; hind legs black with only the knees 

 yellowish. Front trochanters v.nth a brush of relatively long, yellow 

 bristles below; front femora on the posterior side at 

 the base with some curled and united, long, white hairs, 

 then follow two clumps of likewise curled and tangled. 

 black hairs with the apex curved forwards, and here- 

 after long, bristly, black hairs and below some yellow 

 hairs; the front tibiæ are rather abruptly dilated in 

 about the apical third on the posterior side; they are 

 whitish above; below the basal part is brown, then 

 there is a whitish, transverse band, after it a brown 

 patch, the apical part is again whitish with two nar- 

 row, undulated, brown transverse bands at the apex; 

 the posterior margin is black in the middle and it has 

 a fringe of partly black, partly yellow hairs, and similar 

 hairs above; above the dilated part is a tuft of long, 

 tangled, black hairs at the posterior margin; front meta- 

 tarsus dilated, nearly as long at the following joints, 

 second joint as dilated as the first, but very short, 

 about one sixth of the length of the first; third and 

 fourth joints less dilated, the third most ; the joints are 

 dilated to the posterior side ; the tarsus is white, meta- 

 tarsus with some longitudinal, blackish markings below, 

 and the two next joints with the posterior corner 

 blackish below; fifth joint yellow; the middle coxæ 

 bear at the apex on the front side a spine-like, yellow 

 prolongation, often dark at the apex; behind it is an- 

 other small and inconspicuous prolongation; the middle femora have 

 long, pale hairs behind, black, bristly hairs below in the apical half 

 and here also finer, dark hairs on the antero-ventral side ; at the apex 

 below there are three to four fine, recurved hairs; the middle tibiæ 

 are a little thickened on the middle part, slightly narrowed before the 

 apex and here curved a little inwards; they have longish, somewhat 

 tangled, yellow or dark hairs on the posterior side in the basal two 

 thirds and a delicate, short fringe on the postero-dorsal side, but with 

 long hairs in the middle; below there is a short, dense fringe of erect, 



Fig. 102. 



P. scufatus (J, 



light front leg 



from below. 



X 20. 



I 



