76 THE GENUS CORYTHUCHA 



27. Hood longer than median carina 28. 



Hood shorter than median carina obliqua Osborn and Drake (14) 



28. Apical band of elytra wide, one-third the length of elytra, species large. 



pruni Osborn and Drake (6) 



Apical band of elytra narrow, not more than one-fourth the length of 



elytra, species small exigua Drake, new species (13) 



29. Size small, 3 mm. long or less floridana Heidemann (49) 



Size larger, more than 3 mm. long 30. 



30. Length of hood noticeably shorter than median carina 31. 



Length of hood not noticeably shorter than median carina 33. 



31. With a distinct dark brown band across base of elytra, and a less distinct 



one across apex 32. 



No distinct dark brown bands or markings on elytra, sometimes a trace of 

 hght brown bands immaculata Osborn and Drake (54) 



32. Spines on membranous margins long, globose portion of hood narrow. 



unifasciata Champion (41) 

 Spines on membranous margins short, globose portion of hood wide. 



contaminata new species (10) 



33. Length of hood noticeably longer than median carina 34. 



Length of hood and median carina about equal 40. 



34. Width of apical band on elytra one-quarter or less than entire length of 



elytra 35. 



Width of apical band on elytra nearly a third or more the length of elytra. 37. 



35. The two or three large areoles in apical band entirely hyaline 36. 



The two or three large areoles in apical band clouded, only partially 



hyaline coloradensis new species (24) 



36. Two prominent brown spots on paranota fuscomaculata Stil (23) 



A single brown spot on paranota parshleyi new species (12) 



37. Apical band of elytra nearly solid brown, excepting two or three hyaline 



areoles aesculi Osborn and Drake (3) 



Apical band not solid brown, many hyaline areoles 38. 



38. Distinct brown spot at center of costal margin 39. 



No distinct brown spot at center of costal margin . .fuscigera Stdl (2) 



39. Lateral carinae terminating near to base of hood. 



mexicana new species (31) 

 Lateral carinae terminating far from base of hood, .marmorata Uhler (36) 



40. Distinct brown bands across elytra 41. 



No distinct bro'^\'n bands across elytra, nearly unicolorous. 



pallida Osborn and Drake (47) 



41. Spines along membranous margins and on nervm-es of hood and elytra 



very small and comparatively few 42. 



Spines of normal length and number 44. 



42. Species large, over 4 mm. long hoodiana Osborn and Drake (9) 



Species smaller, less than 4 mm. long 43. 



43. Hood abruptly constricted salicis Osborn and Drake (17) 



Hood constricted but not abruptly so. .molliculata Osborn and Drake (26) 



