1864.] 175 



inent small, subobsolete, apical segments slightly obfuscated ; oviposi- 

 tor not exserted. Length 6 lines; expanse of wings 11^ lines. 

 Hah. — New York. Mr. James Angus. 



59. Ich. 1 trogiformis, n. sp 



Dull rufous, thorax beneath and metathorax blackish : antennsB finely sub- 

 serrate, with a yellowish annulus ; wings blackish-violaceous ; segments of the 

 abdomen strongly contracted at incisures. 



Male. — Head large, transverse, subquadrate, slightly broader than 

 the thorax, rufous, paler in front, feebly punctured, shining; clypeus 

 polished ; mandibles with a yellowish spot ; antennge more than half 

 the length of the body, porrect, finely subserrate, black above, brown 

 beneath, the four basal- joints rufous, the 14th to 20th joints yellow, 

 apical joints gradually attenuated. Thorax densely, deeply and con- 

 fluently punctured, the mesothorax and a large irregular stain on the 

 pleura, rufous ; remainder of the pleura and the metathorax black, the 

 latter sometimes tinged with rufous; the collar and scutellum tinged 

 with yellowish, the latter rather convex ; metathorax scabrous, the 

 elevated lines obsoletely defined, the central area small, elongate, sub- 

 obsolete. Wings ample, blackish-violaceous ; nervures and stigma 

 black, the latter with a pale spot at base ; areolet 5-angular, rather 

 oblique, the 2nd recurrent nervure with a process in the middle. Legs 

 moderately long and slender, pale rufous, the tibias and tarsi tinged 

 with yellowish ; posterior coxae black, their femora obfuscated. Abdo- 

 men elongate, not broad, the apex incurved, densely and profoundly 

 punctured ; the segments strongly contracted at the incisures as in the 

 genus Trogus ; rufous; basal segment not much dilated, subconvex, 

 deeply punctured, with a depression on each side at tip, petiole rather 

 short and stout, blackish ; basal fovese of the 2nd segment small, rather 

 deep ; the apical segments have the punctures gradually finer, and the 

 last two are smooth, shining and yellowish-sericeous; beneath tinged 

 with yellowish. Length 6 lines; expanse of wings 10 lines. 



Hah. — New Jersey. E. T. Cresson. 



This singular insect probably does not belong to this genus; in gene- 

 ral appearance it resembles that of Tragus^ but the head is much larger, 

 the antennge are shorter and subserrate, the areolet of the wings diff"e- 

 rently shaped, the scutellum not elevated, and the abdomen not so 

 broad. The structure does not satisfactorily agree with that given of 



