144 [June 



beneath the wings, white ; scutelhim convex, profoundly impressed in 

 front, entirely whitish ; metathorax roughly punctured, the elevated 

 lines distinct, the central area transversely subquadrate, its margins 

 smooth and shining. Wings subhyaline, tinged with fuliginous, with 

 a faint violet reflection ; nervures and stigma black ; areolet 5-angular. 

 Legs black, anterior pair with a spot on their coxae beneath, and their 

 tibiae and tarsi white; intermediate pair with the tips of their trochan- 

 ters and femora, and their tibiae and tarsi white ; posterior pair with a 

 small spot at the base of their femora within, the basal two-thirds of 

 their tibiae and their tarsi also white ; all the tarsal claws black. Ab- 

 domen entirely opaque black; basal segment bilineated, finely aciculate, 

 as is also the base of the second segment, the fovese of which are large 

 and deeply impressed ; beneath black. Length 7^ lines ; expanse of 

 wings 12i lines. 



Ilnb. — Rocky Mountains. Colorado Territory. 



Ifi. Ich. caliginosus. n. sp. 



Black; antennae with a white annulus ; scutellum white: wings fusco-hya- 

 line ; central area of metathorax large, quadrate and transverse. 



Female. — Black, subopaque, densely and finely punctured ; clypeus 

 shining, with a few large punctures ; antennae half the length of the 

 body, black, the 10th to 15th joints white above. Thorax densely and 

 confluently punctured, with an abbreviated impressed line on each side 

 of the mesothorax in front ; .scutellum rather flat, smooth and shining, 

 with a large white spot occupying nearly its whole surface and slightly 

 indented posteriorly; metathorax scabrous, the elevated lines well de- 

 fined, the central area large and transversely quadrate. Wings fuscous, 

 nervures black, stigma piceous, areolet 5-angular. Legs shining black, 

 inner side of the anterior tibiae and tarsi whitish. Abdomen entirely 

 black ; the first segment broad and finely aciculate, the peduncle slen- 

 der ; basal foveae of the second segment deep and oblique ; apical seg- 

 ments rather smooth and shining; ovipositor subexserted, yellowish. 

 Length 6 lines; expanse of wings 11 lines. 



Hab. — Rocky Mountains, Colorado Territory. 



17. Ich. Bronteus, n. sp. 



Black; the face, scutellum and legs in part, yellow; wings subhyaline: cen- 

 tral area of metathorax rather large, subquadrate. * 



Male. — Black, subopaque, closely punctured ; the face beneath the 



