ICHNEUMONID^. 305 



line or subhyaline, iridescerft, areolet triangular, legs rather long, ferruginous, 

 the four anterior coxae and trochanters white, tips of posterior femora, of their 

 tibise and most of their tarsi black ; abdomen long, narrow, very slender at base, 

 pale ferruginous; posterior margin of the fourth segment, the fifth entirely, the 

 sixth, except apex, and the sides of the following segments black, rest of the 

 apical segments above, white ; beneath honey-yellow, the tip black. Length 4-V 

 lines. 



Hah. — Connecticut, Pennsylvania, Illinois. Four %, specimens. Allied to ter- 

 minalis Cresson. 



I. milvus, (Harris' Catal.) — %. Head and thorax black; anterior orbits, face, 

 clypeus, mandibles and palpi yellow or fulvous; antennfe long, slender, especi- 

 ally so at tips which are dusky, the rest fulvous ; tegulse, a spot before, the scu- 

 tellum and a spot behind, and the tegulae, bright fulvous or yellow; metatho- 

 rax finely sculptured, with the elevated lines sharply defined, the posterior an- 

 gles produced into a short blunt spine, central area quadrate or subquadrate; 

 ■wings long, ample, pale yellowish-hyaline, nervures and stigma fulvous, areo- 

 let five-angular, narrow above ; legs rather slender, entirely yellow or bright 

 honey-yellow, posterior pair long; abdomen long, narrow, shining, yellow or 

 bright honey-yellow, the fifth and remaining segments deep shining black, and 

 sometimes the fourth segment, except the basal corners, is also black. Length 

 7 lines. 



Hah. — Massachusetts, Connecticut, Rhode Island. Four % specimens. 



I. bariolus. — 9- Black, shining, finely punctured; head not large, anterior 

 orbits (lull ferruginous; mandibles luteous, black at tips; antennjB rather slen- 

 der, brown-black, with a white annulus about the middle; thorax immaculate, 

 except a small transverse spot beneath each anterior wing ; metathorax feebly 

 sculptured, the elevated lines not sharply defined, the central area moderate, 

 subrotund, the posterior truncation abrupt and transversely striated ; wings sub- 

 hyaline, nervures and stigma black, the areolet broad, 5-angular ; coxae black, 

 more or less tinged with rufous, the posterior pair with a rather long, blunt 

 tooth beneath near the tip; the four anterior legs ferruginous, the posterior pair 

 brown-black, the tibiae, except tijis, and tarsi rufo-fuscous; abdomen rather 

 short, depressed, shining black, the second, third and fourth segments, except 

 ajiex, dull rufous; first segment smooth and polished ; the basal foveas of second 

 segment very transverse and rather deep. Length 4 lines. 



Hah. — Massachusetts, (Ridings.) One 9 specimen. 



I. hebrus. — 9- Small, black, densely punctured, finely pubescent; head broad, 

 scarcely narrowed beneath; antennae rather short, black, the third, fourth and 

 fifth, joints rufous, the tenth to thirteenth white; thorax immaculate; metatho- 

 rax rugulose, the elevated lines sharply defined, the central area elongate, sub- 

 quadrate, posterior truncation rather abrupt, and transversely striated; tegulae 

 brownish; wings subhyaline, tinged with dusky, iridescent, nervures brown, 

 areolet broad, 5-angular; legs, including all the coxae, rufo-ferruginous, apical 

 half of posterior femora and tips of their tibiae, black, tips of all the tarsi dusky ; 

 posterior coxje with a short, blunt tubercle beneath towards the tip; abdomen 

 rather narrow, subparallel, rufous, the fifth and following segments black; first 

 segment shining, almost smooth, not broadly or suddenly dilated at tip; be- 

 neath as above. Length 4i lines. 



% . Much like the 9 . with the antennae longer, and the basal joints black. 



Hah. — Connecticut, Illinois. Two 9 j one 'J, , specimens. 



TEANS. AMER. ENT. SOC. (39) OCTOBER, 1867. 



