23% ORDER VL Hippobofca, 



Genus X. Hippobosca, 

 Linn. Syft. Nat. page ioio. 



The roftrum of the Hippobofca is bi- 

 valve, cylindrical, obtufe, and wavering or 

 ihaking, as if ill fixed tp the mouth. 



The feet are armed with many nails, or 

 crotchets. 



Scopoli adds to thefe characters, that the 

 roftrum has only one brittle. 



Geoffroy obferves, that the Hippobofca are 

 remarkable in being the only genus of Dipter 

 rous infects which want ftemmata, except only 

 the Culex ; their antennas are fetaceous, very 

 fhort, and compofed of a fingle hair -, they are 

 very fiat, hard, and as it were fcaly : it is VQry 

 difficult to kill them by comprefiion. 



The wings, in fomc fubjeds, are crofled one 

 over the other, in others are open. 



Schsffer obferves, that their abdomen is as 

 broad as the thorax. 



The Hippobofcse have been called, by fome 

 authors, Spider-Flies, from the great refem- 



blance 



