100 THE GENUS CORYTHUCHA 



smaller in general size, with the spines shorter and not quite so numerous on 

 nervures of elytra. Also the globose portion of the hood is smaller and nar- 

 rower. 



The type, seven paratypes, and twenty other specimens in the 

 Drake collection have been examined, as well as many others in 

 the U. S. National ^Museum and other collections. The food 

 plant of the species is Eriodidijon californicum. This species 

 has been noted to occur only in California. 



47. Corythucha pallida Osborn and Drake 



1916. Corythucha pallida Osborn and Drake, Ohio Biol. Sui-v., ii, no. 4, p. 231. 



Pronotal hood somewhat higher than median carina, its height equal to 

 one-half its length, and about as long as median carina. Hood not at all 

 flattened, constricted at about the middle with globose portion wider than 

 long, and with verj^ large aieoles. Median carina arched, with at least two 

 very large areoles. Lateral carina medium sized and terminating a consider- 

 able distance from the base of the hood. Costal borders of elytra straight. 

 Areoles in elytra large, especially so near the apex. Spines prominent, tipped 

 with black, numerous but not especially long. Length 3.8 mm., width 2.2 mm. 



Dorsal aspect yellowish, membranous portions hyaline with nervures dis- 

 tinctly yellow. Only color markings are two faint bro'mi bands, one near the 

 anterior line of elytra and the ether near the apex of eh'tra, sometimes lacking. 

 Antennae yellow. 



A paratype and innumerable specimens have been studied. 

 Linden {Tilia americana) and mulberry (Morus rubra) are the 

 known food plants of this species. It ranges from Mar^'land and 

 Virginia west through Ohio, and southwestward through Ten- 

 nessee to Arizona. Uhler's manuscript name adusta refers to 

 pallida. 



48. Corythucha setosa Champion 



1901. Corythucha setosa Champion, Biol. Cent.-Amer., Hemip., ii, p. 7. 



Pronotal hood low, flat, and appearing long and narrow from above; only 

 slightly higher than median carina which itseK is verj' low, as low or lower 

 than the lateral carinae. Height of hood less than one-half its length. Length 

 of hood noticeably less than length of median carina. Hood is narrowed 

 anteriorly but not constricted. Reticulations of hood small, same size as 

 reticulations of paranota. Lateral carinae about same height as median 

 carina, with areoles, and terminating a considerable distance from base of hood. 

 Costal border of eh^tra straight. Spines on membranous portions numerous, 

 short and tipped wuth black. Length 3.5 mm., wndth 2.2 mm. 



General aspect above j-ellow. IMembranous portions hyaline. Nervures 

 all yellow. Pronotiun yellow to fuscous. Fuscous spot on each tumid eleva- 

 tion of ehtra and one in each anterior-lateral angle of elj-tra. 



