1865.] 255 



their femora except extreme base and apex, and the apical third of 

 their tibiae, black, sometimes tinged with rufous ; posterior tarsi tinged 

 with ferruginous. Abdomen orange-ferruginous ; basal segment slen- 

 der, bilineated, finely aciculate, black ; basal foveas of the second seg- 

 ment linear, oblique, black ; basal incisures of the third to sixth seg- 

 ments black, that on the fifth and sixth segments sometimes very broad ; 

 beneath ferruginous, stained on the middle with yellow ; one specimen 

 has a ferruginous spot on the apical middle of the basal segment, and 

 the basal half of the second segment is yellowish. Length 6 — 6£ lines; 

 expanse of wings 9i — 10 lines. 

 Five specimens. 



22. Ichneumon pictifrons, Cresson. 



Ichneumon pictifrons, Cresson, Proc. Ent. Soc. Philad. iii, p. 160. 

 One %> specimen. 



23. Ichneumon bizonatus, Cresson. 



Ichneumon bizonatus, Cresson, Proc. Ent. Soc. Philad. iii, p. 160. 

 ( )ne 9 specimen. 



24. Ichneumon ambiguus, Cresson. 



Ichneumon ambiguus, Cresson, Proc. Ent. Soc. Philad. iii, p. 161. 

 One specimen. Differs from the type, from Pennsylvania, only by 

 the larger size (length 11 J, expanse 18 lines), by the wings having a 

 violaceous reflection, and by the hind tarsi being entirely black. 



25. Ichneumon montivagus, n. sp. 



Black; frontal orbits, sides of face, cordate spot beneath antennae, most of 

 clvpeus. scutellum and the four anterior tibise and tarsi, excejit tips, white : 

 wings fuliginous ; abdomen, except basal segment, yellowish-ferruginous; cen- 

 tral area of metathorax large, quadrate. 



M'dc — Deep black, closely punctured; frontal orbits, very broad on 

 each side of the face, a subcordate spot beneath the base of antennae, 

 and the clypeus, except a spot on the middle anteriorly, white; antennae 

 about half the length of the body, entirely dull black. Thorax black ; 

 scutellum flat, white, except its extreme basal corners; metathorax finely 

 rugose, the elevated lines tolerably well defined, the central area large 

 and quadrate. Wings fuliginous, with violaceous reflection ; nervures 

 black; areolet almost triangular. Legs black, extreme tips of the an- 

 terior femora, their tibiaa except a spot beneath at tip, the two basal 

 joints of their tarsi, a spot at the extreme tip of the middle femora be- 

 neath, basal half of their tibiae, three basal joints of their tarsi, a line 

 on each side of the posterior tibiae near the base, and the base of the 

 first joint of their tarsi beneath, all white. Abdomen elongate, yellow- 

 ish-ferruginous ; basal segment black, bilineated and very finely acicu- 



