ILLINOIS BIOLOGICAL MONOGRAPHS 



1332 



EXPLANATION OF PLATE II 



EPICRANIAL STEM AND TENTORITTM 



1. Cirpliis unipuncia, last instar, transverse section thru front and adfrontals, soft parts 

 removed by potash. 



2. Cirpliis iiniputicij, last instar, ceplialic aspect of head. 



2a. Cirph's unipiinctj, last instar, dorsal portion of vertex and cervacoria. 



3. Zeuzcra pyriiui (Cossidae), last instar, postgenal region, ental aspect. 



4. A pyralid, last instar, postgenal region, ectal aspect. 



5. Cacoecia sp. (Tortricidae), last instar, postgenal region, ectal aspect. 



6. Thyridopicryx epiiemcrjeformis (Psychidae), young larva, postgenal region, ectal asfxrl. 



7. Tliyridoptcryx epiwmcraeformis, last instar, postgenal region, ectal aspect. 



j<If 

 adt 



els 



epm 



f 

 fcs 



t 

 li 



mi-Z 



antenna 



adfrontal sclerite 



adfrontpl suture 



antacoria 



cervacoria 



attachment of cervacoria 



chitinized cervacoria 



cl>peo-labral suture 



clypeal suture 



corpo tentorium 



epicranial arm 



epicranial parademe 



epicranial stem 



epicranial suture 



front 



fronto-cl>-peal suture 



frontal sensorium 



labrum 



labium 



mandibular setae 



