ICIINEUMONID^qi;. 93 



T. marginipennis. — % . Deep black, opaque, body iinmmaculate, clothed with 

 a short black pubescence, face shining; antennae brown-black; scutellum con- 

 siderably elevated, very obtuse, densely punctured, deeply excavated at base ; 

 metathorax rugose, elevated above, with a small, shining, six-sided central 

 area having a lateral and two posterior, well-defined carinas diverging from it, 

 ])Osterior portion very abrupt; pleura polished, sparsely punctured, tegulas pi- 

 ceous, shining; wings bright yellow, the apex as far in as the tip of areolet, 

 and the broad posterior margin of the hinder wings, fuliginous; nervures and 

 stigma fulvous, areolet triangular, not petiolated, receiving the second recur- 

 rent nervure in the middle; legs entirely black, shining ; abdomen very dense- 

 ly sculptured, a little shining at tip, slightly depressed, incisures between the 

 segments deeply impressed. Length S| lines. 



Mab. — Dakota Territory, (Mr. Henry Ulke). Two % specimens. This looks 

 very much like an Ichneumon. 



T. fulvipes. — % . Black, shining, finely punctured ; labrum, tips of mandibles 

 and palpi, except base, pale fuscous; antennse two-thirds the length of the body, 

 tapering toward the tips which are very slender, browu-black, sericeous; scu- 

 tellum much elevated, sub-obtuse; metathorax closely punctured, with the ele- 

 vated lines strongly developed, shining, and forming on the disk a rather large, 

 rounded area; teguloe tinged with fulvous; wings uniformly dark fusco-hyaline, 

 glossy, with a beautiful violaceous reflection. Legs pale fulvous; coxae, tro- 

 chanters, base of middle femora, and the posterior pair entirely, black. Abdo- 

 jnen opaque black, tinged with purple, densely rugulose, the segments depress- 

 ed above and strongly constricted; venter smooth and highly polished. Length 

 S lines. 



Jlab. — Maine. One specimen. 



T. atrox. — 9- I^eep black, opaque, clothed with a short black pubescence; 

 head large and broad, shining, front quadrate, anterior margin of clypeus jio- 

 lished and truncate; mandibles tinged with reddish; antennse brown-black, 

 strongly sericeous toward the tips; scutellum elevated, very obtuse, pilose, 

 deeply excavated at base ; metathorax coarsely rugose, the disk elevated, with 

 a small, oblong central area, having a lateral and two posterior, ill-defined ea- 

 rinse diverging from it, posterior portion abrupt; wings yellowish-fuscous with 

 a slight purple reflection, darker at base and before the apex, nervures brown- 

 ish, stigma and costa fulvous, the former with a subhyaline margin beneath; 

 areolet triangular, not ])etiolated, receiving the second recurrent nervure near 

 the base; legs black, tarsi brown, anterior tibiae and tarsi rufo-testaceous ; ab- 

 domen subconvex, very densely sculjjtured, incisures not dee]}, second segment 

 fulvo-ferruginous, margined all around with black. Length 7J- lines. 



Hab. — Dakota Territory, (Mr. Henry Ulke). One 9 specimen. 



T. occidentalis. — %. Large, more slender than usual; head large, broad, ful- 

 vo-ferruginous, anterior orbits paler, the smooth excavation behind antennoe 

 blackish; (anteniife wanting); mesothorax ferruginous, with a broad, central, 

 black stripe extending to the middle; j^i'othorax ferruginous, black in the mid- 

 dle; scutellum and postscutellum fulvo-ferruginous, the former obtusely ele- 

 vated, punctured, shining, and clothed with yellow pubescence; metathorax 

 rugose, black, with a broad, subarcuate, transverse, ferruginous mark on the 

 posterior portion, bounded anteriorly by a well-defined transverse carina jjro- 

 ceeding from the central area which is elevated, very small and transverse, 



