ILLINOIS BIOLOGICAL MOSOGRAPUS 



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EXPLANATION OF PLATE IV 



CEPHALIC ASPECT OF HEAD 



15. Feltia suhgothka, last instar, cephalic aspect of head. 



16. Polia renigera, last instar, cephalic aspect of head. 

 I63. Polia renigera, first instar, cephalic aspect of head. 



17. Chloridea armigcra, last instar, cephalic of head. 



fcs fronto-cljpeal suture 



fs frontal sensorium 



/ labrum 



11-6 labral setae 



ml -2 mandibular setae 



md mandible 



ol-3 occipital setae 



ocl-6 ocellarae 



pe precl>peus 



po postclj'peus 



pr precoila 



svl~3 vertical sensoria 



V vertex 



vl-t3 vertical setae 



