IUJXOrS BIOLOGICAL MONOGRAPHS 



VOLUME 3 



137 



Oecothea 



138 



Gastrophilus 



139 Olfersi; 



r . ->p.a 



■ g§£ b.t 



a.a V,; 



Tabanus 9 



143 



md^_^ pgI 142Tabanu 



140 Hypothetical 



s ? 



d.a 



145 



Leptis 9 



Pgl 

 144 Simulium ? 



Hypothetical 



141 



\ ■„• ■^ r AsJ~[. ant 



Promachus 



24S 14c7 Scenopinus ? 



mx.pl 



Pipunculus 



151 



mx.pl 7*rY x pgl 

 Bibio$ 



153 



mx.pl' IVfr pgl 

 Bibio <J 



154 



PETERSON HEAD AXD MOUTH PARTS OF DIPTERA PLATE VIII 



