360 INSECTA. 



third, which, either alone, or most commonly conjointly witli it, 

 forms a fusiform, or ovoid and compressed club. 



Here, the proboscis projects and is only geniculate near it origin. 



Sometimes the antennae are much longer than the head, and ter- 

 minated in a fusiform club. The wings are distant. 



Systropus, Wied. — Cephenes, Lat., 



Where the last Joint of the antennae 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 an- 

 tennae are longer in proportion than those of Conops, and their pro- 

 boscis slightly ascends *. 



CoNOPS, Fab., Lat., Meig., 



Or Conops, properly so called, where the two last joints of the an- 

 tenna formed a club, with a terminal stilet. 



C. macrocephala. Fab. Black, antennae and legs fulvous ; 

 head yellow, with a black streak ; four anmjli of the abdomen 

 margined with yellow ; edge of the wings black. 



C. rufipes. Fab. Black ; abdominal annuli edged with wliite ; 

 base of the abdomen and legs, fulvous ; 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 — Apis 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 f. 

 Sometimes the antennae are shorter than the head, and terminate 

 in an ovoid club. The wings are crossed on the body. 



ZoDioN, Lat., Meig. X 

 There, the proboscis is geniculate near the base, and again about 

 the middle, with its exti'emity bent underneath. The antennae are 

 shorter than the head, and terminate in a palette with a stilet. 



Myopa, Fab., 

 To which belongs the 



M. ferruginea. Fab. Russet, with a yellow front and black- 

 ish wings §. 

 The others, Stomoxydce, Meig., in their general form, disposition 

 of their wings, their palette-terminated antennae shorter than the 

 head and accompanied by a seta, and in their triangular or conical 

 abdomen without external appendages, resemble common Flies. 



» Wiedemann, Dipt. Exot., I, vii. 



f See Fab., Lat., Meig., &c., and the first volume of the M^m. de la Soc, d'Hist. 

 Nat. de Par., &c. 



I Lat., Gener. Crust, et Insect., IV, 336 ; Meig. Dipt, xxxvii, 1, 7. 

 § See Fab., Lat., Meig., Fall., &c. 



