152 



ILLINOIS BIOLOGICAL MONOGRAPHS 



(470 



EXPLANATION OF PLATE 

 CEPHALIC ASPECT OF THE HEAD 



Fig. 26 — Pompkttius sp. 

 Fig. 27 — Megaxyda major. 

 Fig. 28 — Neodiprion lecontei. 

 Fig. 29 — Abia americana. 

 Fig. 30 — Pteronidea ribesi. 

 Fig. 31 — Lygaeonematus erichsoni. 

 Fig. 32 — Endelomyia aethiops. 



Fig. 33 — Macremphytus variatms. 

 Fig. 34 — Kaliofenusa ultni. 

 Fig. 35 — MetaUus rubi. 

 Fig. 36 — Schizocerus zabriskei. 

 Fig. 37 — Phlebatrophia mathesoni. 

 Fig. 38 — Dolerus similis. 



ma muscular attachment 



mb mandibularia 



mi mandible 



mds mandibular setae 



mp maxillary palpus 



mx maxilla 



o ocellara 



ou ocularia 



pe preclypeus 



pn pretentorina 



po postclypeus 



pr precoila 



py preartis 



v vertex 



»/ vertical furrow 



