208 



NORTH AMERICAN DIPTERA 



Empidse II. — 13, Oreothalia; 14, Brachystoma; 15, Hemerodromia ; 16, Tachypeza; 17, 

 Lampremis; 18, Tachypeza, front leg; 19, Drapetis ; 20, Drapetis, antenna; 21, Hybos; 22, 

 Empis; 23, Geron (Bombyliidse) ; 24, Empimorpha; 25, Syneches; 26, Chelifera; 27, Hilara. 



