TRIBE I. — GALEATINI. 465 



remaining attached there by its rostrum, drawing the sap from 

 midsummer until the frosts begin to be felt in autumn." For 

 life history see Morrill (1903). 



421a (— ). Corythuca arcuata mali Gibson, 1918, 98. 



Distinguished from arcuata only by the absence of the apical dark 

 bar of elytra, which is either wholly lacking or represented only by a 

 tinge of brown on the nervures, and one or two clouded cells. Length, 

 3.1—3.7 mm. 



Occurs throughout Indiana, Feb. 13 — Sept. 18 ; on the former 

 date beneath bark of apple. Described from New Jersey and 

 at hand from Staten Island, N. Y., Lahaway and Dennison,N. J., 

 May — September (Davis). Taken on wild rose and beaten from 

 oak. Occurs with arcuata probably throughout its range. Drake 

 (1921, 54) reduced it to a variety and states that it "breeds 

 on various species of oak, apple and occasionally on hard and 

 soft maple." 



422 (640%). Corythuca pruni Osborn & Drake, 1916, 231. 



Elongate, subquadrate. Body black; legs and antennae dull yellow; 

 nervures of upper surface straw-yellow, the cells hyaline; paranota 

 with one or two small brown spots; disk of pronotum, except the tip, 

 and broad basal and apical cross-bars of elytra, dark brown, the apical 

 bar enclosing two large hyaline cells, those in apical row also in part 

 hyaline; sutural area flecked with brown. Hood twice or more longer 

 than high, but little higher than median carina, scarcely constricted, its 

 bulbous portion higher than wide, the cells twice or more the size of 

 those of paranota. Median carina evenly arched, with one large basal 

 cell in front of two rows of oblong ones. Costal area with three rows 

 of cells, those of inner row the largest. Spines of margins few and 

 very short. Length, 4 — 4.2 mm. 



Washington, D. C, and Plummer's Island, Md., June — July 

 (Davis) . Its known range extends from New England west 

 to southern Michigan and south to North Carolina. Occurs on 

 wild cherry, Prunus scroti na L., and probably of much wider dis- 

 tribution than the records show. Resembles ccsculi in size and 

 color, but easily separated by the long low hood, lower median 

 carina and shorter marginal spines. The C. pyriformis Parsh. 

 (1920, 81) is a synonym. 



423 .(649%). Corythuca ^sculi Osborn & Drake, 1916, 232. 



Elongate, subquadrate. Body black; antenna?, beak and legs dull 

 yellow; nervures of hood and paranota fuscous-brown, the cells in part 

 hyaline; paranota with a large median submarginal brown spot; prono- 

 tum dark brown, the tip paler; elytra with wide basal and apical cross- 



