DIPTERA. 289 
Conoprs, Lin. 
In some the body is narrow and elongated, the abdomen clavate, 
curved underneath, and with the male organs of generation salient. 
The second joint of the antennz is at least almost as long as the 
third, which, either alone, or most commonly conjointly with it, 
forms a fusiform, or ovoid and compressed club. 
Here, the proboscis projects and is only geniculate near its origin. 
Sometimes the antenne are much longer than the head, and ter- 
minated in a fusiform club. The wings are distant. 
Sysrropus, Wied.—Cephenes, Lat. 
Where the last joint of the antenne alone forms the club, and is 
destitute of a stilet. The abdomen is long and slender. These In- 
sects, peculiar to North America, resemble little Spheges. Their 
antennz are longer in proportion than those of Conops, and their pro- 
boscis slightly ascends(1). 
Conors, Fab. Lat. Meig. 
Or Conops, properly so called, where the two last joints of the an- 
tennz formed a club, with a terminal stilet. 
C. macrocephala. Fab. Blacks antennz and legs fulvous; head 
yellow, with a black streak; four annuli of the abdomen mar- 
gined with yellow; edge of the wings black. 
C. rufipes, Fab. Black; abdominal annuli edged with white; 
base of the abdomen and legs, fulvouss; edge of the wings black. 
It undergoes its metamorphosis in the abdomen of living 
Bombi, and issues from between the rings of the abdomen. A 
footless larva found in the B. lapidaria— pis lapidaria, L.— 
and perhaps that of this species of Conops, has furnished the 
late M. Lachat and M. Audouin with a subject for some excel- 
lent anatomical observations(2). 
(1) Wiedemann, Dipt. Exot., I, vii. 
(2) See Fab., Lat., Meig., &c., and the first volume of the Mém. de la Soe. 
d@’Hist. Nat. de Par., &c. 
Voit. 1V.—2 M 
