174 Proceedings of the Biological Society of Washington. 



Key to the Species. 



A. Front more inflated; upper half of front black, lorae, clypeus and 

 lower half of front yellow; pronotum with fewer transverse 

 wrinkles. proteus. 



A A. Front less inflated; upper half of front pale, or with transverse 

 band or bands, sometimes interrupted; pronotum with more 

 numerous transverse wrinkles. 



B. Lower part of face with a dark, transverse band; front margin of 

 vertex more produced and more strongly arcuate. 

 C. Larger species; a prominent transverse arcuate carina on vertex 

 between eyes. obtusa. 



CC. Smaller species; without such carina. xanthocephala. 



BB. Face entirely pale, vertex less produced, front margin bluntly 

 rounded. pint. 



C. proteus Fitch. 



Key to the Color Varieties. 

 A. Black above. 



B. Uniformly black above; legs chiefly dark. hyperici, n. var. 



BB. Membrane and adjacent parts of tegmina paler; legs chiefly 

 yellow. anceps, n. var. 



AA. Not black above. 



C. Clavus yellow with a lengthwise dark streak. vittata. 

 CC. Clavus colored otherwise. 



D. Anterior two-thirds of clavus, base of scutellum and cross- 



bands on pronotum and head yellow. proteus. 



DD. These markings orange-red. candens, n. var. 



Clastoptera proteus var. hyperici, n. var. Gibson. Agreeing with 

 proteus var. proteus in inflation of face, shape of vertex, striae of pronotum 

 and genitalia, but entirely black above and below, also, with the excep- 

 tions of lower part of face, clypeus, most of pectus, posterior two pairs of 

 coxae, two spots, or an interrupted stripe on lower surface of each of the 

 anterior two pairs of tibiae, a spot on anterior surface, near apex of each 

 femur, the front pair sometimes excepted, apices of hind tibiae except 

 spurs, and hind tarsi, except spurs and last joint, pale yellow. Length, 

 .2.5-3.5 mm. 



Type, a male, Plummers Island, Md., July 5, 1914, on Hypericum pro- 

 lificum, W. L. McAtee, Allotype, same data. Paratypes, same data, also 

 same data except as to dates, July 14 and 26, 1914, and same locality, 

 August 11, 1907, W. L. McAtee. 



This variety has been seen also at Great Falls and at Occoquan, Va., 

 in each case upon the same food plant being most abundant during the 

 flowering season. 



