132 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[470 



EXPLANATION OF PLATE 



CEPHALIC ASPECT OF THE HEAD 



Fig. 26 — Pamphilius sp. 



Fig. 27 — Megaxyela major. 



Fig. 28 — Neodiprion leconki. 



Fig. 29 — Abia americana. 



Fig. 30 — Pteronidea ribesi. 



Fig. 31 — Lygaeonematus erichsoni. 



Fig. 32 — Endelomyia aethiops. 



Fig. 33 — Macremphytus varianus. 

 Fig. 34 — Kaliofenusa ttlmi. 

 Fig. 35 — Metallus rubi. 

 Fig. 36 — Schizocerus zabriskei. 

 Fig. 37 — Phlcbatrophia mathesoni. 

 Fig. 38 — Dolerus similis. 



