182 . [June 



pens with a deep fovea on each side; antennje black, slender, invokite. 

 the 9th to 14th joints whitish above ; scutellum slightly convex, black, 

 polished, impunctnred ; metathorax finely scabrous, opaque, the ele- 

 vated lines well defined, the central area large, quadrate and slightly 

 transverse. Wings subhyaline, slightly stained with fuscous ; nervures 

 and stigma black, the latter with a pale spot at base; areolet 5-augular. 

 Legs black, shining; the anterior tibiae and tarsi in front, pale. Abdo- 

 men elongate-ovate, ferruginous, convex above especially towards the 

 apex which is polished; basal segment black, rather broad, bilineated 

 and minutely punctured, petiole slender. Length 7i lines; expanse of 

 wings 11 lines. 



//aJ._Delaware. Dr. Thos. B. Wilson. 



70. Ich. limbifrons, n. sp. 



Black; lateral margins of the face white; legs and abdomen, except base 

 and apex, rufous ; wings subhyaline ; central area of metathorax moderate, 

 subconical. 



31ale. — Black, finely punctured ; lateral margins of the face and a 

 spot on each side of the clypeus, white; antenna? more than half the 

 length of the body, porrect, entirely opaque black. Thorax and scu- 

 tellum entirely black, somewhat shining, the latter slightly convex ; 

 metathorax finely punctured, shining, the elevated lines well defined, 

 the central area moderate, subconical, rounded in front, indented be- 

 hind. Wings subhyaline, tinged with fuliginous and iridescent ; ner- 

 vures and stigma black ; areolet subtriangular. Legs rufous, the ante- 

 rior pair yellowish, the coxa8 and trochanters black, the tai'si obfus- 

 cated. Abdomen elongate, rather slender, shining, rufous, the petiole, 

 disk of the 5th and the two apical segments, black ; basal segment not 

 much dilated, indistinctly bilineated, punctured ; basal foveas of the 

 2nd segment deep and oblique ; beneath colored same as above. Length 

 4 lines ; expanse of wings 5f lines. 



Hab. — Rocky Mountains, Colorado Territory. 



71. Ich. exiguus, n. sp. 



Black, polished ; abdomen and legs rufous ; wings hyaline ; central area of 

 metathorax small, lunate. 



Female. — Black, poli-shed, indistinctly punctured; face short, slightly 

 pubescent; mandibles mostly rufous; antennge short, piceous, basal joint 

 beneath rufous. Thorax smooth and polished ; scutellum rather flat ; 



