408 DESCRIPTIONS OF ICHNEUMONID.E ASHMEAD. 



3. Head and thorax not black 4 



Head and thorax black. 



Metathorax unarmed; abdomen and legs rufous, the apex of abdomen sometimes 

 black and white. 

 Scutelluru, superior margin of collar and line beneath teguke, white; antenna? 

 ringed with white, apex of abdomen black and white. .C. texensis, sp. nov. 

 Scutellum and collar entirely black ; antennae black; legs, except the four ter- 

 minal joints of hind tarsi Avhich are white, black C. leucopus, sp. nov. 



Metathorax armed; abdomen rufous, black and white. 



Clypeus, orbits, mandibles, liue on collar before and behind, scutellum, spots 

 on pleura, metathorax, and ring on antennae, Avhite . . C. ncbraskensis, sp. nov. 



4. Wholly pale ferrugineous ; antennal joints 8 to 12 white C. brevicauda, sp. nov. 



Cryptus violaceipennis sp. nov. 



Male and Female.— Length 13 to 14 mm ; ovipositor G mm , stature of 

 C. robustus Cr. Entirely black, except the four terminal joints of 

 posterior tarsi and the abdomen, which are rufous, the petiole being 

 black. There is a pale dot on orbits opposite the base of the anteniue, 

 another at summit of eye and a narrow pale post-orbital liue. The 

 head and thorax are punctate, the parapsidal grooves complete, deeply 

 defined; the scutellum is profoundly foveated at base with lateral keels 

 anteriorly extending as a ridge in front of the tegulae ; pleurae and meta 

 thorax rugose, opaque, the latter with a central area, the superior edge 

 of the oblique truncature being keeled. Tarsi strongly spinous, the 

 second, third and fourth joints of anterior pair short and strongly 

 lobed; the base of the claws with two teeth, the hinder tooth being 

 small and difficult to make out. The abdomen shows a delicate aluta- 

 ceous sculpture, the petiole being smooth. Wings black or violaceous 

 black; stigma aud veins black, the cubitus with a stump of a vein a 

 little before the middle, the areolet large, pentagonal. 



Habitat.— Colorado. 



Described from four specimens. 



Cryptus coloradensis sp. nov. 



Female. — Length 7.4 mm ; ovipositor, 4 mm . Head, thorax, and legs 

 black ; abdomen rufous, alntaceous. The auteunse are long, slender, 

 and black, the first joint of the fiagellum being a little shorter than 

 the second aud third joints combined. Head above antennae concave 

 and roughened with irregular lines; the vertex minutely continently 

 punctate; palpi piceous; thorax wit;h deep, complete parapsidal 

 grooves, punctate; pleura and metathorax finely rugose, the latter 

 with two transverse keels. Wings black, slightly violaceous at base; 

 stigma and veins black; the areolet pentagonal, the upper side the 

 shortest, the upper outer side aud the upper inner side of an equal 

 length, the lower outer side being slightly shorter thau the inner side ; 

 the cubitus with a stump of a vein at the middle. 



Habitat. — Powder River, Colorado. 



Described from one specimen. 



