OF WASHINGTON. 121 



apical border of the corium ; membrane blunt, sub-trapezoidal, with the 

 inner angle moderately acute. Legs short, anterior femora wide, and 

 moderately compressed. 



The loral pieces are so obscure in the specimen studied that 

 I cannot now describe their forms. 



If. cixiiformis. New species. 



Dull black, finely sericeo-pubescent, with a narrow white band across 

 the base of the cuneus, the upper surface minutely scabrous and punc 

 tate, very sparsely punctate on middle of hemelytra. Head convex, 

 somewhat grayish above, marked with a pale triangle on upper part of 

 face, followed beneath by pale rufo-piceous to the base of rostrum. Ros 

 trum and sternum piceous. Antennae black, with the two apical joints 

 pale fuscous. Venter red or piceous. Membrane pale, tinged with 

 fuscous. 



Length to tip of hemelytra, 2^-2/4, millims. Width of base of pro- 

 notum, i millimetre. 



Only three specimens of this remarkable insect have yet 

 been discovered. One of them was captured near Washing 

 ton, on the i5th of June, by Mr. Heidemann ; a second was 

 taken at Oakland, Md., July 12, and the third one was secured 

 near Fort Pendleton, W. Va., July 10, in the wooded district 

 adjacent to the fork of the great branches of the Potomac 

 river. 



Other specimens are needed for dissection to work out the 

 elements and affinities of this antique pattern of the Capsidcc. 

 It is remarkable for having the head pressed back upon the 

 sternum, as in the Homoptera, and its general figure distinctly 

 recalls the form which prevails so commonly in many of the 

 Cixiidte. 



Peritropis. New genus. 



Ovate or sub-elliptical, acute in front. Head oblique, contracted and 

 conical in front of the eyes ; eyes large, oval, nearly vertical, as long as 

 the thickness of the head, prominent, but not strongly projecting above 

 the vertex ; vertex moderately convex, having an impressed line in the 

 middle, which is continuous with that upon the pronotum ; face sub- 

 cylindrical, the tylus prominent, extending up .to the level of the an 

 tennae ; upper gena broad and short, inferior cheeks narrow ; antennae 

 nearly as long as the head, pronotum and scutellum united, the basal 

 joint thickest, cylindrical, about as long as the face to tip of tylus, second 

 joint stout, as long as the head and pronotum united, third and fourth 

 abruptly slender and very short ; rostrum slender, reaching to behind 

 middle of venter, the basal joint barely shorter than the throat. Pro- 



