EDMUND H. GIBSON 91 



as type. Paratypes. — One female and six males, same data as 

 type. 



28. Corythucha occidentalis Drake, new species 



Hood highly elevated, slightly longer than high, moderately constricted at 

 the middle, the posterior portion narrowed dorsally. Pronotum with the 

 lateral margins rather broad, reniform, armed with spines on the outer mar- 

 gins; median carina moderately elevated, about one-foui'th as high as the hood, 

 composed of either a single series of large areoles or with a few cells divided 

 near the middle and forming a double series; lateral carinae widely separated 

 from the hood, raised anteriorly, with tlii-ce or four distinct cells. Elytra with 

 large tumid elevation, the outer margin very strongly concave and beset with 

 spines; costal area mostly triseriate, usually a few extra cells near the base. 

 Antennae clothed with a few long hairs, the first segment three times the 

 length of the second. Claspers strongly curved in the male. Length 2.7.5 mm., 

 ■width 1.52 mm. 



General color brown. Pronotum, a large spot on the paranota, a small 

 spot on the median carhia, brown. Hood embrowned. Elytra with a broad 

 band at the base, another near the apex, more or less of the inner margin, 

 and the tumid elevations, brown. Body l:)eneath reddish-brown, in one speci- 

 men partially blackened. Eyes black. 



Type. — 9, Siskiyou County, California. (Collection of C. J. 

 Drake.) Paratypes. — One in Drake collection, one in collection 

 of California Academy of Sciences. 



29. Corythucha pergandei Heidemann 



1906. CuryUiudta pergandei Heidemann, Proc. Ent. Soc. Wash., viii, nos. 1 



and 2, p. 10. 



Pronotal hood liigher than median carina, but not twice as liigh. Its height 

 •equals at least one-half its own length. Length of hood about equal to that of 

 median carina. Reticulations of hood large. Lateral carinae rather large, 

 but short. Costal margins of elytra straight. Spines on membranous mar- 

 gins rather short and inconspicuous. Size, never more than 3 mm. long, often 

 slightly less, 1.7 mm. wide. 



Nervures of hood and anterior portion of paranota more or less embrowned. 

 A light brown band aci-oss base and apex of elytra. Apical band with no 

 areoles entirely hyahne. 



The type specimens, which were collected at Washington, 

 District of Columbia, together with many others have been exam- 

 ined. The range of distribution is from the New England States, 

 west to Wisconsin and south to Kansas. California and Texas. 



The known food plants include Hazel, Elm, Crab-a])ple, Black 

 Alder and Sweet Birch. 



TRANS. AM. ENT. SOC, XLIV. 



