331 



Ramphomtia, Meig., 

 Only differing from Empis by the absence of a little transverse ner- 

 vure in the end of the wing *. 



There, the proboscis is hardly longer than the head. 



HlLARlA,Me!^., 



Where the antennae are terminated by a little biarticulated stile t f . 



Brachystoma, Meig., 

 Where the stilet is extended into a long seta |. 



Sometimes the last joint, also terminated by a seta, forms, with the 

 preceding one, a spherical bedy, as in 



Gloma, Meig., 

 Where the proboscis is also very short §. 



The others present distinctly but two joints in their antennae. The 

 last is ovoid or almost globular, and terminated by the seta, forming, 

 as in the preceding Insects, the second joint of the stilet. The pro- 

 boscis is generally short, and the palpi are incumbent on it. 



Hemerodromxa, Hnffm. Meig. 



Remarkable for the length of the coxje of the two anterior legs ||. 

 Sicus. Lai. Tachydromia, Meig., 

 Distinguished by the inflation of the thighs of the first or second pair 

 of legs % 



Drapetis, Meig., 

 Where the last joint of the antennae is almost globular and the pro- 

 boscis scarcely salient **. 



M. Macquart, by applying the method of Jurine to the Diptera, 

 and paying more attention to other parts, has established several new 

 subgenera which our limits prevent us from describing ft- 



The remaining Tanystomae of our first division usually have a 

 short, wide body, the head applied directly to the thorax, the wings 

 distant and the abdomen triangular. In a word, their general ap- 

 pearance is that of our domestic Fly, Their proboscis is frequently 

 long. 



Crytus, Lat., 



Intermediate between Empis and Bombylius. The wings are in- 

 clined on each side of the body ; and the alulae very large and cover- 

 ing the halteres ; the head is small and globular, the thorax very high 

 or gibbous, the abdomen vesicular and rounded, or almost cubical ; 



* See Lat. Meig., Fab. ; Macq., F. II. 



f Meig., Macq. 



X Meigen. 



§ Idem. 



II Meig. and Macq. 



i Idem. 

 ** Meig. 

 tt Macq. 



z2 



