ILLINOIS BIOLOGICAL MONOGRAPHS 



VOLUME 3 



279 PIpunlliluj 



880' I \ 281 "'IT' 282 



Lonchopiera Psilocephala Scenopinus 



Tabanus^ ( ,^\\ 



283 V ^,.\V- 

 284^ 



Do lie hop US 



PETERSON HEAD AND MOUTH PARTS OF DIPTERA PLATE XII 



