1949] 
Hull — Syrphid Flies 
137 
a pair of brownish grey, well separated, submedial vittse 
extending a short distance behind the transverse suture. 
The scutellum is almost black and might easily be mis- 
taken for black. There is an elongate oval, posteriorly 
acute spot of dense, pale yellow pubescence inside of the 
black humeri and between this spot and the submedial 
vittae there is a quite obscure, opaque black area which is 
not easily seen except from the rear; this opaque area 
extends obscurely for a short distance posteriorward and 
also sends an equally obscure band laterally behind the 
humeri. This pattern is quite distinct. The pile of the 
mesonotum is brassy yellow, abundant, longer than in 
nigra , still longer before the scutellum and longer upon 
the scutellum. There is a distinct, thick, wide patch of 
black setae above the base of the wing and there is a patch 
of long, crinkled yellow tomentum upon the notopleura 
immediately behind it and down the posterior margin of 
the mesopleura. The sternopleura and pteropleura are 
yellow pilose and together with the hypopleura are 
thickly, densely pale yellow pubescent. The squamae are 
pale brownish white with the posterior third blackish; 
their border is black with a pale yellow fringe. Halteres 
orange. Legs: femora quite black, the anterior and mid- 
dle pair obscurely brown at the apex, the hind pair with 
a small yellowish spot ventrally near the apex. The hind 
pair are moderately thickened with yellow pile but short, 
stout black setae ventrally upon the apical third. The an- 
terior and middle tibiae are very dark reddish brown 
throughout; the hind tibiae are only slightly arcuate, 
moderately flattened and quite black, their ventral, dorsal 
and lateral pile black ; their medial pile is pale yellow, be- 
coming brownish red at the apex. The anterior tarsi are 
uniformly dark reddish brown and this is true of the mid- 
dle tarsi which are perhaps only a very little paler on the 
first segment. The hind tarsi are very dark brownish 
black with black pile above and dark reddish brown pile 
below. Wings: The costal cell is perhaps faintly yellow 
throughout. The whole of the subcostal cell, the marginal 
cell and all of the submarginal cell except the loop are 
dark brown ; the brown color extends on either side of the 
anterior cross vein to fill the upper basal angle of the first 
