1864.] 177 



ment very transverse and rather deeply impressed ; incisures of the 

 segments somewhat fuscous ; ovipositor not esserted. Length 4 Unes ; 

 expanse of wings (3 lines. 



Hah. — Rocky Mountains, Colorado Territory. 



62. Ich. dorsalis, n. sp. 



Black ; middle of face, mesothorax, scutellum and abdomen, rufous ; wings 

 dark fuscous; central area of metathorax large, transversely subquadrate. 



Female. — Head black, shining, middle of the face, clypeus, man- 

 dibles, narrow frontal orbits, and the vertex and occiput, rufous ; an- 

 tenna} as long as the thorax, involute, brown, beautifully golden-serice- 

 ous, blackish towards the base, basal joint robust, black, shining- 

 Thorax black, the whole of the mesothorax above and the scutellum 

 rufous, the latter slightly convex, depressed and flattened in front and 

 connected with the mesothorax on each side by a sharp carina ; post- 

 scutellum with an obsolete rufous spot ; metathorax scabrous, opaque 

 black, the elevated lines sharply defined, the central area large, trans- 

 versely subquadrate, the posterior margin bent inwards. Wings fus- 

 cous, with a violaceous reflection ; nervures black, the stigma rufous at 

 base ; areolet 5-angular. Legs shining black, the extreme base and 

 apex of the femora, and the tibijii and tarsi, rufous, the tibiae va- 

 ried with rufo-piceous. Abdomen short, robust, rufous, the petiole 

 rather slender, black ; first segment bilineated and finely aciculate ; 

 basal foveoe of the second segment transverse, rather deep, this and 

 the third segment above subopaque, very densely punctured, the re- 

 maining segments shining, the punctures less distinct ; beneath, the 

 segments, excepting the first, are rufous with their middle obfuscated. 

 Length 6 lines; expanse of wings 11^- lines. 

 Hah. — Rocky Mountains, Colorado Territory. 



63. Ich. Lewisii, n. sp. 



Cinnamon-brown ; the pleura, metathorax, cox» and the first and base of 

 third segments of abdomen black ; antennas tricolored ; wings dark fuscous ; 

 central area of metathorax large and subquadrate. 



Female. — Head cinnamon-brown, palpi paler ; antennae more than 

 half the length of the body, slightly involute, basal joint pale rufous, 

 gradually shading into pale yellow, which color extends to the 18th 

 joint, beyond which the joints are blackish above and dull rufous be- 

 neath. Thorax black, the mesothorax above, as well as the scutellum. 



