ICHNEUMOXID.E. 103 



tiiict placed at about the middle, the up])er surface of the segment, between the 

 middle and apex, with a deep channel ; apical margin of the third and follow- 

 ing segments narrowly white; ovipositor about half the length of the abdomen, 

 fulvous, sheaths black. Length 3| lines. 



% . — Closely resembles the 9 > but the face is not silvery ; the two basal joints 

 of the antennae are white ; the posterior legs are paler, being only dusky, with 

 their coxsb and trochanters whitish, and the abdomen is more slender and not 

 at all subcompressed at tip. Length 3i lines. 



Hab. — Connecticut % , New Jersey 9 • One 'J, , one 9 , specimens. The form 

 of the % much resembles that of muHebris, but the head is larger and the an- 

 tennae shorter and stouter. The 9 bas somewhat the form of some small species 

 belonging to the Ophionidfe. 



M] ignotus. — 9- Black, shining, subpubescent; head large, quadrate, almost 

 subglobose, eyes smaller than usual, ovate, prominent, face pubescent, palpi 

 whitish; antennte black, rather stout; thorax short, gibbous, immaculate; scu- 

 tellum prominent, with a deep excavation in front; metathorax sloping, trans- 

 A'ersely striated, especially on the apical half, the elevated lines well-defined at 

 base, subobsolete at tip, the middle with a long, broad enclosed space, flat, or 

 slightly concave, the anterior half smooth and shining, the posterior half 

 transversely striated; tegulae piceous; wings hyaline, iridescent; nervures pale 

 brown, stigma dark brown, areolet 5-angular, the outer nervure wanting ; legs 

 slender, black, the trochanters and four anterior femora tinged with reddish, 

 their tibiae and tarsi yellowish; abdomen petiolated, polished, rufous; first seg- 

 ment long linear, and very slender, black at base which is flattened above, the 

 stigmatae situated near the apex which is slightly dilated and subconvex; re- 

 maining segments fusiform when viewed from above, flattened, polished, the 

 tip subcompressed and truncate in profile ; ovipositer not exserted. Length 4 

 lines. 



Hab. — West Virginia. (Ridings.) One 9 specimen. This is a curiously 

 formed insect and will doubtless constitute a new genus. 



M T nastutus. — % 9- Dull honey-yellow ; head subtransverse, black, the face 

 of the 9 with a nose-like protuberance, almost flat in the % ; beneath the an- 

 tennae a reddish spot; clypeus of % reddish on the middle; mandibles ferrugi- 

 nous, palpi pale yellow; antennae long, very slender, black, the basal joints 

 honey-yellow, a broad white annulus about the middle; prothorax prolonged 

 into a neck; mesotiiorax much flattened on the disk; metaihorax rather large, 

 with tolerably well-defined elevated lines, forming an elongate central area; 

 wings rather short and narrow, hyaline, iridescent, nervures and stigma 

 luteous, costa brown, areolet wanting, second recurrent nervure very long and 

 almost straiglit; legs long and slender, color of the body; abdomen a little 

 longer than head and thorax, petiolated, depressed, first segment rather 

 broadly dilated beyond the middle; ovipositor of 9 about half the length of 

 the abdomen, the sheaths black, white at tips. Length 3i lines. 



Jfab. — Pennsylvania. (Cresson.) One ^ , one 9> specimens. Remarkable 

 for the nose-like elevation on the face of the 9- 



Tryphon communis. — '^ 9- Black, shining, subsericeous ; head broad and 

 short, face pubescent, clypeus very transverse, yellow, fringed with long hairs, 

 mandibles, except tips, and the palpi pale yellow; antennae as long as the liead 

 and thorax in 9 > longer in % , brown, testaceous at tips and at base beneath. 



