172 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



6. Suprahumeral horns present Ceresa, p. 175 



Suprahumeral horns absent Stictocephala' p. 179 



7. Tegmina with five apical areas ; veins distinct Acutalis, p. 180 



Tegmina with four apical areas ; veins indistinct . . Micrutalis, p. 181 



8.. Terminal cell of hind wing sessile, its base truncate 9 



Terminal cell of hind wing triangular and petiolate 14 



9. Pronotum without horn or crest 10 



Pronotum with horn or crest 1 1 



10. Dorsum low and rounded Carynota, p. 182 



Dorsum high, compressed and foliaceous Archasia, p. 192 



1 1. Horn a flat dorsal crest 12 



Horn anterior and porrect Thelia, p. 183 



12. Crest arising from behind humeral angles 13 



Crest arising from between humeral angles Glossonotus, p. 184 



13. Crest step-shaped Heliria, p. 185 



Crest not step-shaped Telamona, p. 186 



14. Base of corium with three veins 15 



Base of corium with two veins 19 



15. Corium with cross vein at base 16 



Corium without cross vein at base Smilia, p. 192 



16. Dorsum strongly compressed 17 



Dorsum rounded Ophiderma, p. 202 



17. Pronotum not inflated posteriorly 18 



Pronotum inflated posteriorly Xantholobus, p. 201 



18. Crest highest anteriorly Atymna, p. 198 



Crest highest near middle Cyrtolobus, p. 193 



19. Terminal cell of tegmen triangular 20 



Terminal cell of tegmen transverse Vanduzea, p. 204 



20. Dorsum strongly elevated, with deep median notch .... Entylia, p. 205 

 Dorsum only slightly elevated, with weak median depression 



Publilia, p. 206 



Microcentrus Stal. 



This genus of the subfamily Centrotinae has but one species in 

 New England. This insect may be at once distinguished from 

 all other local Membracidae by its entirely uncovered scutellum. 

 In general appearance it suggests a large cercopid. 

 M. caryae (Fitch). 



185 1. Uroxyphus caryae Fitch. Cat. Ins. N. Y., 52. 



1851. Centrotus caryae Walker. List. Horn. Brit. Mus., 1147. 



1869. Microcentrus caryae Stal. Bid. Memb. Kan., 295. 



1896. Phaulocentrus caryae Fowler. Biol. Centr. Amer., 159. 



Fairly common throughout northeastern United States on 

 hickory. Has not been reported from Connecticut but is known to 

 extend from Ohio and Pennsylvania northeastward into Canada. 

 Common in New York and Massachusetts. Life history unknown. 



Hosts : Hickory, oak. 



Gargara Amyot and Serville. 

 Only one species is known to occur in the United States. 

 G. genistae (Fabricius). 



1764. Cicada genistae Geoffroy. Ins., i. 424. 19. 

 1781. Cicada genistae Fabricius. Sp. Ins., ii. 318. 17. 



