90 THE GENUS CORYTHUCHA 



Nervures of hood and paranota embrowned, with areoles more or less 

 clouded with cream. A light brown band across base and apex of elj^ra. 

 Tumid elevations embrowned. Areoles in apical band more or less opaque, 

 none entirely hyaline. 



Tijpe. — 9, Poudre Canyon, Colorado. (Collection of C. J. 

 Drake.) Allotype. — cT, same data as type. Paratype.- — 9,. 

 same data as type. 



During the summer of 1917, Mr. Drake found what seems to> 

 be this species occurring quite commonly on willow at Cranberry 

 Lake, New York. 



26. Corythucha molliculata Osborn and Drake 



1916. Corythucha molliculata Osborn and Drake, Ohio Jr. Sci., xvii, no. 1, p. 12. 

 This species Avas described from a single specimen bearing the 

 locality label — Ag. Coll. Mich. June 12, 1890. Because of the 

 general inadvisability of describing a new species from a single 

 specimen without a known food plant, and because of the broken 

 and missing median carina, a redescription is hardly warranted. 

 Until a large series is procured the author must keep the validity 

 of this species under suspicion. However, the triangular shape 

 of the hood, with but little constriction, may prove sufficient to 

 keep it distinct. Other characters are to be noted from the 

 key. 



27. Corythucha salicata new species 



Pronotal hood slightly liigher than median carina. Height of hood about 

 one-half its own length, and length slightly shorter than median carina. 

 Median carina of normal height, not arched. Lateral carinas long, terminat- 

 ing a short distance from base of hood. Recticulations of hood about same 

 size as those of paranota. Spines on membranous margins and nervures small 

 and scarce. Costal margins of elytra nearly straight, slightly constricted at 

 the middle. Size, 3.4 mm. long, 2 mm. wide. 



General aspect above white or cream colored. Crest of hood shghtly em- 

 browTied. Two faint brown spots on paranota. Rather faint brown band 

 across base, which is sometimes obsolete, and apex of elytra with tumid eleva- 

 tions embrowned and rather pointed or acute. A tiny brown spot at center 

 of costal margin of elytra. 



This species is very similar to drakei new species, but from 



which it may be separated by the less arched median carina, which 



is slightly shorter, and l^y the angulate tumid elevations of elytra. 



Type.— 9 , Hood River, Oregon. (J. C. Bridwell, Aug. 4, 



1908.) (Collection of C. J. Drake.) . Allotype. — cf , same data 



