Biology of the Membra cidae of the Cayuga Lake Basin 243 



Tegmina smoky hyaline, veins prominent, bases punctate especially along veins and at 

 costal margins, tips dark brown or black. Legs and undersurface of body ferruginous. 

 Length: female, 10 mm.; male, 8.5 mm. Width: female, 5 mm.; male, 4 mm. 



17. Carynota porphijrea Fairmaire (Plate xxvi, 4) 



1S46 Thelia porphijrea Fairm., Rev. Memb., p. 306, no. 4. 



1851 Walk., List Hom. B. M., p. 555. 



1867 Opiilete porphyrea Stal, Bid. Memb. Svst., p. 556, pi. 2, fig. 22. 



1878 Glover, MS. Journ. Hom., pi. 2, fig. 22. 



1908 Carynota porphyrea Van Duzee, Stud. N. A. Memb., p. 57. 



1915 Metcalf, Hom. No. Car., p. 7. 



1916 Van Duzee, Check List Hem., p. 59, no. 1614. 



Scarce. Occasionally taken on oak. Much smaller and shorter than the 

 preceding species and easil}' separated by its color. 



Technical description. — Smaller than preceding species; dorsum higher and more arched; 

 brilliant chestnut in color with irregular yellow markings. 



Head triangular, brightly marked with red and yellow patches, sculptured, finely punctate, 

 sparingly pubescent; eyes prominent and black; ocelli not prominent, pearly, nearer to each 

 other than to the eyes; clypeus red with obsolete median yellow line; inferior margin of face 

 strongly sinuate. 



Pronotum chestnut, irregularly dotted with yellow, broad transverse yellow band at base 

 of posterior process, coarselj' punctate, sparingly pubescent on anterior surface; dorsum 

 elevated, middle of elevation high and arcuate, sudden depression before posterior process; 

 on each side an indentation at about center; posterior process short, thick, heavy, tectiform, 

 not reaching apices of tegmina. 



Tegmina smoky hyaline, veins prominent, ba.ses and costal margins punctate, tips clouded 

 with chestnut. Undensurface of body chestnut. Legs ferruginous. 



Length 8 mm.; width 4 mm. 



The genus Thelia A. & S. 



Only one species of the genus Thelia is represented in the Cayuga Lake 

 Basin, but this species is so connnon that it ranks second in abundance 

 of all the Membracidae of the region. 



18. Thelia biniaculata Fabricius (Plate xxvi, 5, 6) 



1794 Membracis bimaculata Fabr., Ent. Svst. 4:10, no. 11. 



1799 Coq., 111. lo. hpl. 8, fig. 1. 



1803 Fabr., Syst. Rhyng., p. 14, no. 37. 



1842 Harris, Treatise, p. 178, 179. 



1843 Thelia bimaculata A. & S., Hem., p. 541. 



1846 Fairm., Rev. Memb., p. 312, no. 21. 



1851 ■ Walk., List Hom. B. M., p. 566. 



1851 Walk., List Hom. B. M., p. 1142. 



1851 Fitch, Cat. Ins. N. Y., p. 52. 



1851 Thelia unanimis Walk., List. Hom. B. 'St., p. 56(). 



1854 Thelia bimaculata Emm., \. Y. Agr. Rept. 5:156, pi. 3, fig. 15 



1862 Uhler, Harris' Treati.se, p. 221. 



