84 ILLINOIS BIOLOGICAL MONOGRAPHS [84 



f. Triangle formed by the three cephaloventral ocelli having 

 a right or obtuse angle at the fourth ocellus, the fifth as 

 close to the fourth as to the sixth; coloration consisting 

 wholly of transverse stripes. Telphusa 



ff. Triangle formed by the three cephaloventral ocelli always 

 having an acute angle at the fourth ocellus, the fifth 

 about equidistant from the fourth and sixth; coloration 

 almost always including longitudinal stripes. Gelechia 



Becurvaria 



dd. Seta rho of segment 8 dorsad, rarely cephalodorsad, of spira- 

 cle ; body caudad of prothorax entirely pale ; setae minute, 

 e. Head and prothorax usually strongly chitinized and black. 



Phthorimaea 

 ee. Head and prothorax slightly chitinized and pale. 



Gnorimoschema 



bb. Crochets of ventral prolegs in a pair of transverse bands, usually 

 biordinal, those of anal prolegs in two groups, prolegs short; 

 spiracle of abdominal segment 8 very large. Ypsolophus 



Anarsia 

 Trichotaphe 

 Anacampsis 



The species of Gelechia vary greatly. 



The difference between Gnorimoschema and Phthorimaea, as given, 

 is certainly not one of generic value but may serve to separate the two 

 species studied. It is unlikely that the collector east of the Mississippi 

 will find larvae belonging to other species. According to Busck the two 

 genera should be united. 



The following species were studied, in most cases two to six individ- 

 uals being seen. The variation is a serious problem only in the genus 

 Gelechia. 



Metzneria lapella 



Sitotroga cerealella 



Nealyda hifidella 



Arogalea (Paralechia) cristifasciella 



Telphusa fuscopunctella 



Recurvaria sp. ( ?) 



Phthorimaea operculella 



Gnorimoschema gallaesolidaginis 



Trichotaphe serrativatella, T. alacella 



Anarsia lineatella 



Ypsolophus ligulellus 



Anacampsis populella, A. lagunculariella, A. innocuella 



