Biology of the Membracidae of the Cayuga Lake Basin 291 



Coy's Glen and the surroundino- hills have proved one of the best stations 

 for the species. 



Technical description. — Varies greatly in color, markings, and shape of pronotuni, 

 particularly in form and position of dorsal sinus; small, usually grayish or yellowish, 

 unicolorous or marked mth black or brown, in some ca?es almost entirely black; head pro- 

 jecting forward; dorsal crest high and distinctly bilobed with a rounded notch between 

 lobes; posterior process hea\y and blunt; tegmina almost entirelj' hidden under pronotum. 



Head as long as broad, densely and coarsely punctate, not pubescent; base sinuate; inferior 

 margin strongly sinuate; varying in color from gray to black; eyes wider than long, not 

 prominent; ocelli prominent, often reddish, about equidistant from each other and from 

 the eyes; clypeus wider than long, convex, coarsely punctate, sparingly pubescent, tip broadly 

 rounded. 



Pronotum high, compressed, distinctl\' bilobed; anterior lobe rising almost vertically 

 above and before humeral angles, two strong ridges on each side extending from apex down- 

 ward below base, apex usually truncate, higher behind than before; posterior lobe longer 

 than anterior, rounded at tip, two ridges, more or less distinct, on each side; notch between 

 lobes varying in size and shape but always rounded at bottom; sides of pronotum bearing 

 ridges — usually three — extending from humeral angles to near posterior apex; pale fascia 

 usually present at base of posterior lobe, extending to lateral margin of pronotum; posterior 

 process hea\y, blunt, extending beyond tips of tegmina; lateral areas of pronotum variously 

 marked but usually showing the transverse fascia. 



Tegmina almost entirely covered by pronotum; exposed costal areas opaque and densely 

 punctate for more than half their length at base, tips hyaline. Undersurface of head fuscous; 

 thorax and abdomen varjang in color. Legs concolorous, usually flavous. 



Length 5 mm.; width 2.5 mm. 



The genus Publilia Stal 



The standing of the genus Publilia has been questioned, and it has been 

 suggested that the species assigned to this genus do not show characters 

 distinct enough to be classed as generic. The forms as delimited show a 

 much less elevated crest and a much weaker median notch than those of 

 Entylia. 



61. Publilia concava Say (Plate xxix, 13, 14) 



1824 Membracis concava Say, Narr. Long's Exp. App., p. 31L 



1835 Entylia concava Germ., Silb. Rev. 3:249. 



1842 Membracis concava Harris, Treati.se, p. 178. 



1846 Entylia concava Fairm., Rev. Memb., p. 301, no. 5. 



1851 Walk., List Horn. B. M., p. 547. 



1851 Fitch, Cat. Ins. N. Y., p. 47. 



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



1854 Emm., N. Y. Agr. Rept. 5: 153, pi. 13, fig. 10. 



1859 Membracis concava Say, Compl. Writ. 1 :200. 



1862 Entylia concava Uhler, Harris' Treatise, p. 220. 



1866 Publilia concava Stal, Analecta Hem., p. 388. 



1869 Ceresa concava Rathvon, j\Iomb. Hist. Lane. Co. Pa., p. 551. 



1876 Publilia coTicava L^hler, List Hem. West Miss. River, p. 344. 



1877 Entylia concava Glover, Rept. U. S. Dept. Agr., p. 24. 



