BY FREDERICK A. A. SKUSE. 
1367 
“Head almost entirely occupied by tlie eyes in the ^ small, 
elongated, and inclined in the Proboscis projecting; terminal 
labella indistinct ; labrum and tongue ciliated towards the 
extremity. Palpi 5-jointed ; first joint very small. Antenme 
cylindi’ical, pei’foliated, inserted under the eyes, 9-join-ted ; two 
first joints separated from the others, the rest very short. Eyes 
hairy in the naked, small and a little prominent in the 2* 
Abdomen terminated with two hooks and two tubercles in the 
Legs hairy; fore femora short, dilated in the ^ > kind pair 
elongated in the ^ ; tibiae grooved ; fore pair short, dilated, 
terminated by a long and a short spine ; posterior pair dilated in 
the (J. Joints of the tarsi elongated ; three pulvilli at the 
extremity. Two basal cells to the wings.” 
Ohs . — Macquart does not mention in the above that Bihio has 
three ocelli, and he says nothing about the shape of the joints of 
the palpi. In Bxbio imitator t\\Q&Q areas follows : First joint very 
small, second cylindrical, the width and nearly three times the 
length of the fii’st, third robust, obovate, as long as the second, 
fourth rather shorter and not as wide, somewhat claviform, fifth 
joint rather more slender but about the length of the last, some- 
what claviform. This pretty well agrees with the diagnosis given 
by Curtis (Brit. Ent. Vol. 3, 1826, p. 138) from dissections of B 
venosns. Meigen, Curtis, and Macquart all pronounce the number 
of joints of the antenn® to be nine, and the first two authors 
have carefully figured these organs, but in both ^ and ^ speci- 
mens of B. imitator there are distinctly 2- -}- 8-joints, the last joint 
somewhat smaller than the one preceding it, though by no means 
so insignificant as to be liable to be overlooked by anyone who 
examiued the antenme. The first flagellar joint in B. imitator 
is as large as either joint of the scapus, the remainder short and 
transverse. jVbdornen with eight segments. There is great 
diversity usually in the sexes. 
The females deposit their eggs in the ground or in dung, where 
the larvaj feed and the transformations take jdace. The full- 
grown insects are sluggish in their movements, and are found 
