No. 34-] HEMIPTERA OF CONNECTICUT: CERCOPIDAE. 225 



nate, posterior margin deeply emarginate ; elytra coriaceous, twice 

 longer than wide, parallel-margined or convex; wings, with the 

 third vein from the marginal vein either forked or entire ; dorsal 

 surface closely and finely punctate, and clothed with a short, pros- 

 trate pubescence ; male plates ' curved dorsally at nearly right 

 angles to abdomen. 



Key to Species. 



1. Elongate; elytra nearly parallel-margined; anterior margin of 



pronotum broadly rounded ; color constant 2 



Broad and short ; elytra strongly convex ; anterior margin of pro- 

 notum nearly angulate ; color variable spumarius 



2. Size large, 8mm. or more; pale yellow, conspicuous stripe from 



anterior margin of tylus, medially across vertex and pronotum, 

 and along suture of elytra to apex, dark brown to black . .parallelus 

 Size small, not exceeding 6.5 mm. ; pale yellow, stripe wanting 



lineatus 

 P. spumarius (Linnaeus). (Fig. 20, 46-50.) 



Cicada spumaria Linnaeus. Faun. Suec. (2d ed.), 240, 881, 1761. 

 Ptyelus albiceps Provancher. Nat. Can. iv, 351, Hemip. du Can., 258. 

 Philaenus lineatus Provancher. Hemip. du Can., 258. 

 Philaenus spumarius Ball. Proc. la. Acad. Sci., vi, 224, 1898. 



Broad, convex ; elytral margins distinctly rounded ; head broad 

 and short ; color variable. Length 5.5-6 mm. ; width 2-2.5 mm - 



Vertex short, length equal one-half width, and equal to one-half 

 length of pronotum, anterior margin obtusely angled ; tylus 

 broader than long, twice length of vertex behind it; ocelli equi- 

 distant from eyes and each other ; pronotum with slight depres- 

 sions in anterior portion of disc, anterior margin nearly angulate, 

 lateral margins less than distance between ocelli ; elytra with costal 

 margins strongly convex, reflexed before middle ; wings with the 

 third vein from the marginal one forked before the apex. 



Genitalia: Female, last ventral segment deeply incurved in 

 median line; pygofers slightly broader than long, outer margins 

 rounded, exceeded by the short ovipositor by one-half their length. 

 Male, last ventral segment three times length of preceding; plates 

 broad at base, width here equal to that of last segment, length 

 twice width, inner margins attingent, outer margins tapering to tip. 



Color : This species is exceedingly variable in color, presenting 

 forms which range from pale yellowish white to almost jet black, 

 as described under the following color varieties. 

 P. spumarius var. ustulatus (Fallen). 



Grayish-brown ; vertex and anterior half of pronotum tawny- 

 yellow; a large spot on the costal margin of the elytra, another 

 slightly smaller and posterior to this, light. 

 P. spumarius var. fasciatus (Fabricius). 



Vertex and anterior half of pronotum yellow; remainder of 

 pronotum and elytra dark-brown, with the exception of two large 

 transverse white spots, one anterior and the other posterior to 



