89] LEPIDOPTEROUS LARVAE — FR ACKER 89 



Phycitinae. This group aud Pyraustinae are the two large sub- 

 families of Pyralididae and many of the larvae of both of them are of 

 economic importance. They represent two diverging lines of evolution, 

 the one characterized by a complete circle of crochets on the prolegs and 

 the presence of kappa and mu on segment 9, the other losing the lateral 

 crochets of the prolegs as well as kappa and mu on segment 9. Asso- 

 ciated with Phycitinae in the former division are the two subfamilies 

 just discussed, and all three are included together in a single synopsis 

 of the genera, those belonging to Pyralidinae being marked with an 

 asterisk (*). 



Genera of Phycitinae, Pyralinae, and Epipaschiinae : 



a. Prothorax with delta twice as far caudad of beta as beta is of alpha, 

 alpha and beta usually closely associated (Fig. 47). 

 b. Head longer than broad ; body unicolorous, dark. Thyridopyralis 

 bb. Head broader than long, 

 c. Boundaries of adfrontals meeting epicranial suture at a point 

 nearly twice as far from vertical triangle as f i'om front ; colora- 

 tion in longitudinal stripes. Meroptera 

 cc. Boundaries of adfrontals meeting epicranial suture at a point 

 half way between vertical triangle and front, 

 d. Kappa nearly directly caudad of eta on first abdominal seg- 

 ment; fourth ocellus about as close to sixth as to third. 



Euzophera 



dd. Kappa directly dorsad of eta on first abdominal segment; 



fourth ocellus farther from sixth than from third. 



e. Pinacula of all setae heavily chitinized; body widened at 



middle. Melitara 



ee. Pinacula of all setae slightly chitinized; body cylindrical. 



Salehria 

 aa. Prothorax with delta much less than twice as far caudad of beta as 

 beta is of alpha, beta and delta often closely associated (Fig. 43). 

 b. Beta of prothorax nearly directly dorsad of delta; head and body 

 pale (Fig. 43). Psorosina 



bb. Beta of prothorax located much farther cephalad than delta, 

 c. Boundaries of adfrontals reaching vertical triangle. 



d. Vertical triangle nearly as large as front; prothoracic shield 



black. Elasmopalpus 



dd. Vertical triangle normal, small; prothoracic shield pale; 



pinacula slightly chitinized. Hulstea 



cc. Boundaries of adfrontals not reaching vertical triangle. 



d. Kappa of first abdominal segment directly dorsad of eta; 

 boundaries of adfrontals meeting in an acute point. 



