1864.] 183 



metathorax finely punctured, tlie elevated lines well defined, the central 

 area very small, lunate. Wings hyaline, iridescent; nervures and stig- 

 ma black; areolet 5-angular. Legs rufous; posterior coxae black. Ab- 

 domen short and stout, subovate, smooth and polished, rufous ; basal 

 segment broad, obsoletely aciculate ; basal foveae of the 2nd segment 

 obsolete ; ovipositor not exerted. Length 2^ lines ; expanse of wings 

 4^ lines. 



Hab. — Rocky Mountains, Colorado Territory. 



72. Ich. rufizonatus, n. sp. 



Black; antennae with a narrow white annulus ; wings subhyaline; second 

 and third segments of abdomen ferruginous ; central area of metathorax large 

 and quadrate. 



Female. — Black, shining; clypeus polished, with a -deep fovea on 

 each side ; antennae about half the length of the body, black, sericeous 

 beneath, the 9th to 12th joints white above. Thorax closely punctured ; 

 scutellum slightly convex, punctured ; metathorax finely scabrous, the 

 elevated lines well defined, the central area large, quadrate, slightly 

 elongate. Wings subhyaline, slightly stained with fuliginous, and hav- 

 ing a faint metallic reflection ; nervures and stigma black ; areolet 

 5-angular. Legs black, the anterior tibiae and tarsi in front whitish. 

 Abdomen elongate-ovate, black, convex above and polished towards 

 the apex ; basal segment bilineated, minutely punctured, petiole slen- 

 der; second and third segments ferruginous above and beneath. Length 

 7 lines; expanse of wings 11 lines. 



Hah. — New Jersey. E. T. Cresson. 



73. Ich. involutus, n. sp. 



Black, polished : antennae strongly involute, legs and the 2nd .nnd :^rd seg- 

 ments of the abdomen rufous ; wings fuliginous ; central area of metathorax 

 large, quadrate, polished. 



Female. — Black, polished, finely punctured; face short; clypeus 

 very transverse, with a large deep puncture on each side; mandibles 

 rufous, cheeks with scattering puncturns ; antennae short, strongly in- 

 volute, black, apical two-thirds tinged with rufous, and densely clothed 

 with yellowish-sericeous pubescence, basal joint robust, globose, rufous 

 beneath. Thorax closely and finely punctured, indistinctly so on the 

 disk above which is polished ; scutellum rather flat, polished ; meta- 

 thorax densely punctured, subopaque, the elevated lina« not well de- 



