Fluke—Syrphidae of Wisconsin . 
247 
Male: Antennae slightly reddish beneath the base of 
the third joint. Face and frontal triangle black with 
white pollen. Thorax and scutellum shining bronze. First 
segment of abdomen mostly shining black; second and 
third segments mostly yellow, base of second with an 
opaque black cross-band with a triangular projection into 
the yellow portion, continued as a light brown median line 
to the narrow brownish posterior band; third segment 
with no anterior dark band but with an indistinct brown 
posterior band covering about one third of the segment; 
there is also a slight indication of a median dark line; 
fourth and fifth segments shining black. Femora black 
except at extreme tips; tibiae and first three joints of tarsi 
light yellow in front legs; tibiae and first two joints of 
middle legs light brownish; hind tibiae and tarsi mostly 
dark. A dense patch of short white hair on hind coxae, 
less on the other coxae; distinct black small spines at tip 
of middle tibiae. “Coxal” spur quite prominent, tibial 
spur rounded. Squamae and halteres light yellow. 
Brachypalpus Macquart 
125. B. frontosus Loew. Two males from Dane County. May. 
Crioprora Osten Sacken 
126. O. cyanogaster Loew. One specimen, Milwaukee County. 
Criorhina Meigen 
'Face produced downwards and forwards; males dichoptic; ground 
color black, thickly pilose...sub-genus (Criorhina) 
Face produced downwards, convex below, males holoptic, ground 
color with yellow markings, moderately pilose... 
. subgenus Cynorhina 
Face produced downwards, convex below; eyes dichoptic, moder¬ 
ately pilose, in large part yellow. sub-genus Somula 
Cynorhina Williston 
Face with a median black stripe; second segment of the abdomen 
on the sides, continued more narrowly on the third, yellow.... 
. badia 
Face yellow, without a black median stripe; abdomen black, except 
a large part of the fourth and the whole of the fifth segments, 
which are bright orange yellow.... analis 
