Biology of the ]Membracidae of the Cayuga Lake Basin 287 



Pronotum uniform green, in some cases tinged with reddisii, closely and densely punctate, 

 finely pubescent; dorsum rounded, depressed behind middle, median carina percurrent; 

 posterior process heavy, tectiform, acute, not extending to tips of tegmina. 



Tegmina hyaline, bases reddish and punctate, tips clouded with fuscous, veins heavy and 

 inclined to be punctate along margin. Legs and undersurface of body entirely flavous. 



Length 7-8 mm.; width 3-4 mm. 



The genus Vanduzea Goding 



The genus Vanduzea is close to Ophidenna but is distinguished by the 

 terminal cell of the elytra, which in Vanduzea is transverse and truncate 

 at the base. 



The genus is entirely North American and five species have been 

 described from various parts of the United States. Only one of these 

 species is found locally, but this is the commonest membracid in the 

 basin. 



59. Vanduzea arquata Say (Plate xxix, 7-10) 



1831 Memh-acis arquata Say, Journ. Acad. Nat. Sci. Phila. 5 : 302. 



1851 Carynota arquata Fitch, Cat. Ins. N. Y., p. 48. 



1851 Walk., List Hom. B. M., p. 1144. 



1859 Membracis arquata Say, Compl. Writ. 2:380. 



1869 Caranota arcuata Rathvon, Momb. Hist. Lane. Co. Pa., p. 551. 



1878 Carineta arquata Glover, MS. Jouni. Horn., pi. 2, fig. 24. 



1890 Ophiderma arquata Van Duzee, Psyche 5:389. 



1890 Smith, Ins. I^. J., p. 442. 



1892 Vanduzea arquata Godg., Ins. Life 5:92. 



1893 Ophiderma arquata Godg., Can. Ent. 25:172. 



1894 Vanduzea arquata Godg., Cat. Memb. N. A., p. 440. 



1895 Gillette and Baker, Hem. Colo., p. 68. / 

 1903 Vanduzea arcuata Buckt., IMon. Memb., p. 218. 



1908 Vanduzea arquata Van Duzee, Stud. N. A. Memb., p. 103, pi. 2, fig. 30. 



1909 Smith, Ins. N. J., p. 93. 



1909 Carynota arcuata Van Duzee, Can. Ent. 41 :3S2. 



1910 Vanduzea arquata Matausch, Joiu-n. N. Y. Ent. Soc. 18:169. 



1912 Matausch, Bui. Amer. Mus. Nat. Hist. 31 : 325, pi. 32, fig. 16. 



1913 Branch, Kans. Univ. Sci. Bui. 8:106, figs. 14, 15, 68, 69, 78. 

 1913 Funkh., Hom. Wing Veins, figs. 6, 7, 9, 20, 28, 47, 69. 

 1915 Metcalf, Hom. No. Car., p. 9. 



1915 Funkh., Psyche 22: 183-198, pi. 17. 



1916 Van Duzee, Check List Hem., p. 61, no. 1709. 



Extremely abundant. Easily the commonest species of Membracidae 

 in the region. Three or four broods a year on locust. The, nymphs and 

 the adults are present in great mnnbers thruout the summer, and the 

 specimens may be collected by thousands from young locust trees in all 



