302 E. T. CRESSON. 



I. Dakota. — %■ Black, opaque: face, orbits, clypeus, mandihlos and palpi le- 

 mon-yellow; antenuse long, blackish above, fulvous beneath, the basal joint 

 yellow beneath : two short lines on disk of mesothorax, tegulpe, sutur<il line be- 

 fore, a short line beneath, scutellum, post-scutellum, and posterior half of ineta- 

 thorax, lemon-yellow ; elevated lines of metathorax sharply defined, central 

 area large, open behind; wings hyaline, faintly tinged with yellowish, ner- 

 vures brown, stigma fulvons: legs yellow, the four anterior femora behind fus- 

 cous; posterior coxse, excepttips, their femora, except extreme tips and base with- 

 in, and the apical third of their tibiae, black: abdomen flattened, opaque black, 

 third secrmcnt with a broad yellow band, shaded behind with fulvous, lateral 

 margins of the fourth and fifth segments markeil with fulvons: apical segment 

 tinged with brownish; beneath yellow, darker laterally. Length 6 lines. 



Hab. — Dakota Territory, (Ulke). One % specimen. 



I. inurbanus. — ?. Eobust, black, shining; head robust, not narrowed be- 

 neath; antennte short, robust, joints short and thick, black, with a pale annu- 

 lus about the middle; mesothoi-ax polished, finely punctured; scutellum flat, 

 polished; metathorax opaque, rugose, central area oblong-quadrate; tegulte 

 piceous; wings violaceous-black; legs shining black, the anterior pair palish 

 in front; tarsi tinged with brown; abdomen robust, ovate, finely and closely 

 punctured, brown-ferruginous, basal segment black. Length 6 lines. 



Jfab. — West Virginia, (Ridings). One 9 specimen. Closely allied to I. rvfi- 

 venlrifi. but distinct by the shorter, stouter antennce and finer sculpture of the 

 body. 



I. insolens. — 'J, 5?. Rather large, head and thorax robust, abdomen long and 

 narrow, black, densely punctured, somewhat shining; head scarcely narrowed 

 beneath, anterior orbits beneath antennae and a dot on each side of anterior oc- 

 ellus while; antennae short in P , longer in % , slender at tips, subserrate in 'J, , 

 black, with a white annulus about the middle, obsolete beneath: thorax gib- 

 bous, immaculate; scutellum long, convex, coarsely punctured and clothed with 

 short black hair; metathorax coarsely punctured, except the quadrate central 

 area which is smooth and polished, as well as the carinse that bound it; wings 

 broad, not long, violaceous-black; nervures and stigma black; arcolet large, 

 quadrate, very slightly oblique, the second recurrent nervure straight; legs 

 slender, black, the posterior pair long ; anterior legs before, tips of middle femo- 

 ra, and the posterior femora entirely, rufous ; abdomen long, narrow, entirely 

 dull rufous, densely and coarsely })unctured; venter j'ellow. Length 6^ — 7 

 lines. 



JSab. — Georgia, Florida, Mississippi, Louisiana. Two 9? fifteen % specimens. 

 Probably not a true Ichneumon. Closely allied and congeneric with I. vieridi- 

 onalis, from Cuba. 



I. semicaeruleus. — 9- R'^l)ust; head, thoi-ax and base of abdomen deep blue, 

 shining, clothed with a fine, short, pale pubescence anterior orbits subobso- 

 letely pale; antennee with the basal third black, middle white and the apical 

 third brown ; tegulae black, with a white dot in front; scutellum polished, with 

 a round white central spot; metathorax rugulose, central area large, quadrate, 

 not well defined; wings pale yellowish-hyaline, nervures and stigma black; 

 legs blue, anterior pair pale in front, tips of posterior femora and their tarsi 

 ferruginous; abdomen oblong-ovate, first segment deep blue, remaining seg- 

 ments rufo-ferruginous, polished towards the apex; beneath as above. Length 

 lines. 



