220 



THE ENTOMOLOGIST. 



Fig. 40. — Nemestrina. 



Fig. 41. — Scenopinus. 



Fig. 4'^. — Hirmoneiira. 



The Tabanidse and Asilidse are distinguished by their 

 powerful flight, and the Bombylidae (figs. 38, 39) are remark- 

 able on account of their extreme quickness on the wing. In 

 fig. 38 the first branch of the pra^brachial bone joins the 

 second branch of the cubital, and thereby the subapical 

 areolet is closed far from the border of the wing. There is an 



