68 



ILLINOIS BIOLOGICAL MONOGRAPHS [238 



EXPLANATION OF PLATE 

 Cephalic Aspect of the Head 



Pipun cuius cingulatus, male. 

 Eiiipis clausa, female. 

 Sccnopinus fenestralis, male. 

 Scenopinus fenestralis, female. 

 Dolichopus bifractus. 

 Calobata univitta. 

 Drosophila ampelophila. 

 Sepsis violacea. 

 Desiitometopa latipes. 

 Oecothea fenestralis. 

 Hctcroneura flaviseta. 

 Chyromya concolor. 

 Chloropisca glabra. 

 Sphyracephala brevicornis. 

 One odes costatus. 

 Gastrophilus eqiii. 

 Tetanocera plumosa. 

 Ochthera mantis. 

 Olfersia ardeae. 



