104 THE GENUS CORYTHUCHA 



base of hood. Costal margins of elytra nearly straight. Spines along mem- 

 branous portions and on nervures numerous and small. Length 3.8 mm.^ 

 width 2.5 mm. 



Above pure white, membranous portions hyaline, only colors showing are the 

 black eyes and yellow antennae and legs. 



Tj^pe and paratypes were at hand for study. 



The species has been recorded only from Washington, possibly 

 occurs throughout the northwest. Balsamorhiza sagittata, th& 

 prairie sunfiower, is the onty known food plant. 



56. Corythucha hispida Uhler 



1894. Corythucha hispida Uhler, Proc. Cal. Acad. Sci., ser. 2, iv, p. 279. 



Pronotal hood slightly higher than median carina, its height one-half of 

 its length, shghtly flattened posteriorly. Globose portion of hood small, 

 slightly wider than long. Hood abruptly constricted behind the middle. 

 Reticulations of hood small, equal in size to those of paranota. Median carina 

 slightly longer than pronotal hood with two rows of areoles. Lateral carinae 

 large, terminating near base of hood, and with large areoles. Costal margins 

 straight. Few hairs on antennae. Spines numerous and long, on borders of 

 elytra and paranota; nervures of hood, carinae, elytra, and paranota. Length 

 3.2 mm., width 1.9 mm. 



Dorsal aspect entirely whitish or cream, membranous portions hyaline. 

 Antennae and legs yellow-fuscous. 



Food plant unknown. Occurs throughout the south and 

 southwest. Many specimens, including the type, were at hand 

 for study. 



57. Corythucha contracta Osborn and Drake 



1916. Corythucha contracta Osborn and Drake, Ohio Biol. Surv., ii, no. 4,. 

 p. 230. 



The single specimen from which this species was described 

 was evidently injured or dwarfed at the time of the last nymphal 

 molt, as it is noticeably distorted, especially the elytra; and since 

 capture has been otherwise too badly damaged to allow of its- 

 being placed with other species. The specimen was collected at 

 Jefferson, Ohio. Food plant unknown. 



The author is simph^ appending this to the foregoing treat- 

 ment of species, as he considers its recognition as a distinct 

 species unwarranted, but because of damaged condition it can- 

 not be placed as a synonym of any other species. 



