388 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 12 



in trying to identify the larva is entirely eliminated when these insects 

 reach the pupal stage. 



As in the larvae, the pupae of P. nubilalis are slightly longer and 

 stouter than those of P. genitalis. The average length of the male 

 pupa of nubilalis, when retracted is 13 mm., while that of penitalis is 



V / 



wt 



M 



A^ 



.0,6 



49 

 (LIO 



La-l 



Pyrausta nubilalis. — Fig. 19, 4, ventral view; 5, dorsal view; 6, lateral view. (Ab- 

 breviations as in P. pemtalis.) 



11 mm. The females average respectively 15 and 13 mm. Both 

 species are yellow when young, tinged with brown on the head and 

 cremaster. When older, especially in nubilalis, the dorsal surface 

 becomes quite brown. 



The main differences in the pupae may be easily seen in the figures. 

 Perhaps the most striking is the blunt projection on the head of peni- 

 talis. In the ventral views (Figs. 18, 19, 1 and 4) it will be noticed 



