458 FAMILY XV. — TINGIDIDjE. 



that it is a common species in the Adirondacks around Cran- 

 berry Lake. The C. borealis Parsh. (1918a, 92) is a synonym. 



412 ( — ). Corythuca bellula Gibson, 1918, 93. 



Oblong-subquadrate. Body black; antennae, beak and legs pale red- 

 dish-brown; nervures of hood, disk of pronotum, one or two small sub- 

 marginal spots on paranota, basal and apical bands and spot on each 

 elevation of elytra, brown; apical cross bar of elytra with two or three 

 large central cells and apical row of smaller ones, hyaline. Hood more 

 than twice as high as median carina of pronotum, its cells large and 

 crest forming an obtuse angle. Median carina low, not arched, its length 

 less than that of hood. Marginal spines short, not crowded. Length, 

 3 mm. 



Ithaca, N. Y., Sept. 10 (Gerhard). Types taken at Tiffin, 

 Ohio, on Cratagus. Recorded also from Cranberry Lake, N. Y., 

 on alder. 



Group B. — Corythuca. 



This group comprises four small species having the crest 

 of hood never more than twice as high as median carina, and 

 elytra wholly devoid of dark basal or apical cross-bars or with 

 only faint traces of such bars. 



KEY TO EASTERN SPECIES OF GROUP B, CORYTHUCA. 



a. Cells of the globose portion of hood larger than those of the para- 

 nota. 

 b. Larger, length 3.5 or more mm. 

 c. Color above wholly milky-white except a fuscous spot on tumid 

 elevations of elytra; hood depressed above just behind the 

 middle. 413. ciliata. 



cc. Color pale straw-yellow with no fuscous marks on elytra ; hood 

 not flattened, constricted about the middle, globose portion wider 

 than long, the cells very large. 414. pallida. 



bb. Smaller, not over 2.5 mm.; hood only slightly higher than the 

 median carina; elytra with traces of basal and apical cross-bars, 

 the cells toward apex very large. 415. floridana. 



aa. Cells of globose portion of hood not larger than those of paranota; 

 median carina as high as hood; length, 3 mm. 416. gossypii. 



413 (638). Corythuca ciliata (Say), 1832, 26; I, 348. 



Elongate-subparallel. Body black; antennae and legs yeVowish, 

 tarsi and fourth antennal darker; color of upper surface as in key. 

 Hood only slightly higher than median carina, its height less than half 

 its length, narrowed but not constricted in front of middle. Median 

 carina moderately elevated throughout its length, and with two rows of 

 cells; lateral carina? also elevated, with one row of cells. Length, 3.7 mm. 



