20 The Ohio Journal of Science [Vol. XX, No. 1, 



one large and several smaller spines. Each spine on this and 

 previous stages bears a hair. All spines and hairs arise from 

 tuberculate bases. 



ADULT. 



Corythucha bulbosa Osborn and Drake (Ohio Biol. Sur. ii, 

 No. 4, p. 232, 1916). This is the largest of the species of 

 Corythucha and easily recognized by the brown costal margins 

 of the elytra. According to Gibson it was known by the 

 manuscript names, carbonata of Uhler and Heidemann and 

 staphlea of Heidemann before being described by Osborn and 

 Drake. It occurrs on Staphylea trijolia, American bladder-nut, 

 and Gibson gives its known range as from Maryland and 

 Virginia west to Ohio. 



REFERENCES TO THE SPECIES. 



Osborn and Drake, Ohio Biol. Sur. II, No. 4, p. 232. 

 Van Duzee, Cat. Hem. p. 215. 



Osborn and Drake, Ohio Jour. Sci., Vol. XVII, No. 8, p. 304. 

 McAtee, Bull. Brook. Ent. Soc, Vol. XII, No. 4, p. 79 

 Gibson, Tr. Am. Ent. Soc, XIIV, p. 77: 



