1947] 
Hull — Syrphid Flies 
231 
of long, pale yellow hairs ; the pleura are black and some- 
what brassy down the middle, their pile thick, long and 
pale yellow. The squamae are white, the fringe and 
border pale yellow, the halteres dark brown. Abdomen: 
slender and petiolate, first segment wholly shining green- 
ish black with long, abundant, fine yellow pile on the sides. 
The second segment is light brownish red, shining and 
with a slender, medial, brownish black line running almost 
the full length of the segment stopping close to the base ; 
this segment is nine times as long as its least width; the 
width at the apex is a little more than one and one-half 
times as long as the least width, the basal width barely 
greater than the apical width. The third segment has a 
pair of large, pale, brownish red, elongate, postero- 
medially produced spots upon the base of the segment 
which are separated by light brown in the middle ; the 
remainder of the segment except the posterior border is 
nearly opaque black, the posterior margin shining. The 
fourth and fifth segments are wholly shining black; the 
fourth segment is not quite twice as long as wide. The 
sides of the second segment have long, fine, abundant pile 
directed outwardly; there is similar but shorter pile on 
the sides of the third segment except the posterior fifth 
where it is appressed; there is still shorter erect pile on 
the sides of the basal half of the fourth segment; the erect 
pile on the third and fourth segments is reddish yellow 
but on the second segment it is chiefly blackish except at 
the immediate base. All other pile of the abdomen is 
black. Legs: the anterior and middle femora are light 
reddish brown; their tibiae are pale brown becoming a 
little more yellowish close to the apices and the base. 
The anterior tarsi are brown, the middle tarsi entirely 
yellow. The hind femur is sepia except at the extreme 
apex; hind tibiae black, the base narrowly yellowish, its 
pile black. The hind basitarsi are black on the basal half 
with sepia pile, diffusely shading in the middle to pale 
yellow; the remaining segments are pale yellow. The 
pile of the hind femur is sepia to black. Wings: pale 
brownish hyaline ; the pterostigma and the anterior mar- 
gin of the wing to the end of the submarginal cell is dark 
