78 THE GENUS CORYTHUCHA 



General color dark. Antennae and legs yellowish. Hood embrowned, 

 the center of a few large areoles hyaline. Paranota dark brown. Elytra dark 

 brown, the centers of two large areoles near the apex and a few areoles on inner 

 margins of costal area hyaline. 



This is the largest of all the species and easily recognized by 

 the brown costal margins of the elytra. Previous to its being 

 described by Osborn and Drake it was known by the following 

 manuscript names, carbonata of Uhler and Heidemann and sta- 

 phyJea of Heidemann. It is known to occur on Staphylea trifolia, 

 American bladder nut, and its present known range is from Mary- 

 land and Virginia west to Ohio. Large series of specimens have 

 been examined, besides the type and paratypes. 



2. Corythucha fuscigera St§,l 



1862. Tingis fuscigera St&l, Stett. Ent. Zeit., p. 323. 

 1876. Corythucha fuscigera St&l, Enum. Hem., iii, p. 122. 

 1873. Monanthia lucida Walk., Cat. Hem. Het., vi, p. 191. 



Pronotal hood higher but not twice as high as the median carina, its height 

 is two-thirds the length of the hood. Length of hood greater than length of 

 median carina. Hood abruptly constricted, the globose portion wider than 

 long, not flattened on top or posteriorly. Reticulations of hood large. Med- 

 ian carina with large areoles. Lateral carinae of medium height, cloudy, and 

 terminating a considerable distance from base of hood. Costal borders of 

 elytra straight. Spines short, numerous on border of paranota. Length 4.5 

 mm., width 2.5 mm. 



Membranous portions hyaUne marked with brown. Nerviu-es yellow. 

 Hood more or less embrowned. Two brown spots on paranota. Tumid 

 elevations of elytra with brown spot. Brown bands across base and apex of 

 elytra. Two hyaline areoles in apical band. 



The species ranges from New Jersey west to Colorado and 

 Arizona and south through Mexico and Central America. Food 

 plant unknown. Many series of specimens have been exam- 

 ined. 



3. Corythucha aesculi Osborn and Drake 



1916. Corythucha aesculi Osborn & Drake, Ohio Biol. Sur., ii, no. 4, p. 232. 



Pronotal hood somewhat higher than median carina but not twice as high; 

 its height equal to one-half or more of its length and about equal to the length 

 of median carina. Length of hood noticeably greater than length of median 

 carina. Globose portion of hood large, wider than long, and with large areoles. 

 Median carina high and well arched. Lateral carinae small. Costal margins 

 of elytra straight. Spines on membranous borders medium length and numer- 

 ous, scarce on nervures. 



General color dark brown. Hood almost entirely embrowned. Brown 

 band across base and apex of elji;ra; apical one wide, at least one-third the 

 length of elytra and entirely brown excepting two or three large hyaline areoles. 



