ICHNEUMONID^. 309 



or ferruginous, immaculate, the extreme base of the first segment sometimes 

 bhiekish. Length 4i — 5 lines. 



Hah. — Connecticut, Pennsylvania. Seven 9 specimens. Closely allied to 

 canadensis, but differs principally by the immaculate abdomen, that oi canaden- 

 sis being banded with black. 



I. anceps. — % 9- Elongate, narrow, subcylindric. polished, falvo-ferruginous; 

 head rather small, not narrowed beneath; antenna? slender, convolute, black- 

 ish, fulvous at base, a broad white annulus about the middle : space around the 

 scutellum and the sutures of the thorax beneath, black; scutellum slightly 

 convex, polished, bright lemon-yellow ; metathorax feebly sculptured, the cen- 

 tral area large, subquadrate, polished, the elevated lines not well defined; tegu- 

 Ife pale honey-yellow; wings hyaline or yellowish, nervures fulvous, areolet 

 rather large, 6-angular; legs moderate, four anterior coxaj pale beneath; ti]is 

 of posterior femora, and of their tibite, black; abdomen long, almost cylindri- 

 cal, the tip more or less compresed, highly polished; first segment slender at 

 base, swollen and convex at tip, arcuate; apical segment with a yellow spot, 

 sometimes obscure; in one specimen the apical segments are more or less stain- 

 ed with blackish; venter yellowish. Length 6 — 6.V lines. 



Hab. — Connecticut, Delaware. Five specimens. ReTiiarkable for the shape of 

 the abdomen being like that of some species oi Exetasies. 



I. duplicatus, varies much in the color of the posterior legs which are 

 sometimes mostly black, but generally the femora are entirely fulvous, occa- 

 sionally with the tips blackish; their tibite are generally dusky, with the ba- 

 .sal half yellowish ; the coxae vary from almost entirely black to almost entirely 

 yellow or whitish, generally of the latter color, with an exterior black mark. 

 Numerous % specimens. 



I. W-album. — This is very closely allied to duplicatus, Say, but the^ is larger, 

 more elongate and slender, the head broader, the legs more slender and the ab- 

 dominal segments proportionately longer and narrower. The second and fol- 

 lowing segments are sometimes much stained or spotted with Jalackish or fus- 

 cous, generally the second and third segments have a fuscous spot on each side 

 before the middle; some examples have all the segments, except the first, en- 

 tirely fulvous, immaculate. The posterior legs pale fulvous, with the coxae and 

 trochanters white, spotted above with black. The markings of the head and 

 thorax are almost exactly like those of duplicatus. The J is much more robust 

 than the % , but is similarly colored, except the head, which is black, with the 

 anterior orbits, generally interrupted on each side of antennse, a spot on middle 

 of face and more or less of the clypeus, either yellow or ferruginous; the an- 

 tennae are short and stout, black, reddish at base beneath, and with a whith an- 

 nulus in the middle; the pleura is often without any spots; the legs are short 

 and robust, fulvous, the coxae and trochanters whitish, the posterior coxae marked 

 with black as in the %; the abdomen is oblong-ovate, depressed, shining; the 

 first segment smooth and shining at tip, which is margined with yellow; some- 

 times this segment varies from fulvous to blaek; second and third segments 

 sometimes with a brown stain on each side as in the 'J,. Length J , 6i — 7 lines; 

 % , 6 — S lines. Six f , eighteen % specimens, from Mass., Ct., N. Y., N. J., Pa., 

 Del., Md., D. C. 



I. lascivus. — ■%. Head black, the orbits, very broad on the cheeks, the face, 

 except a triangular black mark on the middle, the cly])eus, except a central 

 black stripe, the mandibles, excejit tijis, and the jjalpi, white; antennae long. 



