PLATE lo 

 Eiiropean corn borer and its nearest American allies: 



A. — Dorsal view of head capsule; larva of Pyrausta nubilalis. 



B. — Lateral view of head capsule; larva of P. nubilalis. 



C. — Epipharynx; larva of P. nubilalis. 



D. — Labrum; larva of P. nubilalis. 



E. — Dorsal view of head capsule; larva of P. penitalis. 



F. — Lateral view of head capsule; larva of P. penitalis. 



G. — Dorsal view of head capsule; larva of P. ainsliei. 



Explanation of symbols applied to larvae, Plates lo and ii. 



AS A^, A^, A^=setae and puncture of anterior group of epicranium. 



Adf', AdP, Adf*=adfrontal setae and ptuicture of epicranium. 



ATS=antennal shield formed by projection on dorsal surface of epicranium. 



C=cardo. 



ES E^=epistomal setae. 



ER=epipharyngeal rod. 



ES=epipharyTigeal shield. 



ET=epipharyngeal setae. 



FS F''=frontal seta and puncture. 



GS G''=genal seta and pimcture, 



LS L*=seta and pimcture of lateral group of epicranium. 



La^ La^, La^=lateral group of setae of labrum. 



LR=longitudinal ridge of epicranium. 



M', M^, M^=median group of setae of labrum. 



mt=thomlike chitinization on proleg bearing abdominal segments. 



OS O^, O^, 0''=setEe and puncture of ocellar group of epicranium. 



PS P2, P*, P'^=setae and punctures of posterior group of epicranium. 



SOS SO^, SO'', SO*=setse and punctiire of subocellar group of epicranium. 



X=ultraposterior setae and puncture of epicranium. 



