1864.] 151 



its anterior margin which is black ; a transverse white line on the post- 

 scutellum ; metathorax densely and confluently punctured, the elevated 

 lines well defined, the central area moderate, narrow and transverse, 

 the space in front convex. Wings hyaline, slightly fuliginous at tip ; 

 iiervures and stigma black ; areolet 5-angular or subtriangular. Legs 

 black, the two anterior pairs in front and their coxse beneath, as well 

 as a line on the posterior tibia? and tarsi behind, white. x\bdomen 

 elongate, rather slender, densely and very finely punctured ; basal seg- 

 ment bilineated, closely punctured, the extreme apex with a large white 

 spot on the disk and a smaller one on each side, having the appearance 

 of a transverse band trilobed in front ; basal foveas of the second seg- 

 ment large, deep and somewhat oblique ; apical segments rather smooth 

 and shining. Length H lines; expanse of wings 11 J lines. 



^a^*.— Delaware. Dr. T. B. Wilson. 



Closely resembles Ich. ofiosus Say, but the antennae have no white 

 annulus, the face is entirely white, the colors of the legs are difierently 

 arranged and the metathorax has no lateral white spot as is always 

 present in that species. 



2". Ich. agnitus, n. sp. 



Black; autennte with a broad white annulus; orbits, a spot on each side of 

 clypeus, lateral lines of mesothorax and the scutellum, white ; wings subhya- 

 line ; central area of metathorax subquadrate. 



Female. — Black, shining. Head with the orbits of the eyes and a 

 spot on each side of the clypeus, white ; antennae about half the length 

 of the body, the apex involute, the 9th to 15th joints white, spotted 

 beneath with black. Thorax strongly punctured ; tegulae black ; the 

 collar above, a sutural line before and a short line beneath the wings, 

 white; scutellum flat and polished, with a large round white spot cov- 

 ering nearly its entire surface, behind it an obsolete pale spot; meta- 

 thorax densely and confluently punctured, the elevated lines tolerably 

 well defined, the central area moderate, subquadrate, rather smooth. 

 Wings subhyaline, slightly stained with fuscous; nervures and stigma 

 black; areolet 5-angular or subtriangular, slightly oblique. Legs black, 

 the anterior and middle femora at tip, the anterior tibiae in front and a 

 spot on the posterior coxae beneath, white. Abdomen elongate, black, 

 slightly tinged with blue, densely and minutely punctured ; basal seg- 

 ment bilineated, broad posteriorly, distinctly punctured and having at its 



