68 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[238 



EXPLANATION OF PLATE 



Cephalic Aspect of the Head 



Pipuncidus cingulatus, male. 

 Enipis clausa, female. 

 Scenopinus fenestralis, male. 

 Scenopimis fenestralis, female. 

 Dolichopus bifractus. 

 Calobata univitta. 

 Drosophila ampelophila. 

 Sepsis violacea. 

 Desmometopa latipes. 

 Oecothea fenestralis. 

 Hcteroneura flaviseta. 

 Chyromya concolor. 

 Chloropisca glabra. 

 Sphyraccphala brevicornis. 

 Oncodcs costatus. 

 Gastrophilus equi. 

 Tetanocera plumosa. 

 Ochthera mantis. 

 Olfersia ardeae. 



