EDMUXD H. GIBSON I t 



44. Distinct brown band across apex of elytra 46. 



Without distinct brown band across apex of elytra, nervures may be 



embrowned but areoles not clouded 45. 



45. Brown spot on paranota large uhni Osborn and Drake (42) 



Brown spot on paranota small mali new species (43) 



46. Apical band solid browTi except for two or three hyaline areoles. 



pallipes Parshley, new species (11) 



Apical band not solid brown, very few areoles entirely clouded, many 



partially hyaline 47. 



47. Paranotal spot large and prominent, hood considerably embrowned. 



piercei new species (16) 

 Paranotal spot small, not prominent, hood but slightly embrowned. 



cellides Osborn and Drake (15) 



48. Median carina extremely low, with never more than one row of small 



areoles 49. 



Median carina normal height, often two rows of areoles 52. 



49. Pronotal hood constricted 50. 



Pronotal hood not constricted setosa Champion (48) 



50. Spines long and numerous on nervures of membranous portions 51. 



Spines not numerous on membranous portions caelala Uhler (50) 



51. Width of globose portion of hood less than maximum distance between 



lateral carinae spinosa Dugds (45) 



Width of globose portion of hood as great or greater than maximum dis- 

 tance between lateral carinae eriodiclyonae Osborn and Drake (46) 



52. Median carina as high or higher than hood gostiypii Fabricius (40) 



Median carina lower than hood 53. 



53. Lateral carinae terminating close against base of hood, .pura Gibson (55) 

 Lateral carinae terminating near to base of hood 54. 



54. Spines on membranous margins and nervures numerous, large. 



hispida Uhler (56) 

 Comparatively fewspines on membranous margins and nervures, small. 55. 



55. Tumid elevations of elytra well rounded, long. . . .drakei new species (44) 

 Tumid elevations of elytra rather pointed, acute, short. 



salicala new species (27) 



1. Corythucha bulbosa Osborn and Drake 



1916. Corythucha hulbosa Osborn and Drake, Ohio Biol. Sur., ii, no. 4, p. 232- 

 Pronotal hood extremely large and high, more than twice as high as median 

 carina; height equal to more than two-thirds the length of the hood. Hood 

 considerably longer than median carina, not at all flattened on top or poster- 

 iorly; abruptly constricted at the middle; globose portion large with its width 

 greater than its length. Reticulations of hood large. Median carina arched, 

 with large areoles. Lateral carinae very small, short, and low without distinct 

 areoles. Costal margins of elytra straight. Spines on membranous margins 

 and nervures very small and dark. Size, 4.6 mm. long, 2.6 mm. wide. 



TRANS. AM. ENT. SOC, XLIV. 



