160 [June 



of the second segment small, not deep ; apex of the first segment and 

 the apical two-thirds of the two following segments yellow, in one spe- 

 cimen the apical middle of the fourth segment is obscurely yellowish ; 

 beneath colored same as above. Length 4A lines ; expanse of wings 

 7 lines. 



^^,7;. —New York (Mr. Angus); Illinois (Dr. Lewis). 



About half the size of kh. Isettis BruUe, which it resembles in color, 

 except that the meso- and metathorax are immaculate. 



37. Ich. pictifrons, n. sp. 



Black, face spotted with yellow; scutellum, legs in part, and the 2nd and 3rd 

 abdominal segments yellowish : wings subhyaline; central area of metathorax 

 large, transversely quadrate. 



Male. — Black, very finely punctured ; a wedge-shaped stripe on each 

 side of the face, two small spots immediately beneath the antennae, 

 clypeus, except a blackish spot on its middle, and a spot on the man- 

 dibles, yellow ; antennae more than half the length of the body, por- 

 rect, black, tip of the basal joint beneath yellowish. Thorax entirely* 

 black ; scutellum slightly convex, yellow, stained with fulvous at base 

 and apex ; metathorax finely and densely punctured, the elevated lines 

 well defined, the central area large, transversely quadrate, its posterior 

 margin rather indistinct. Wings subhyaline, slightly stained with 

 fulio-inous, and having a slight violaceous reflection at tips ; nervures 

 blackish, stigma brown ; areolet .5-angular. Legs yellowish ; the coxfe, 

 the four anterior femora behind, the posterior femora entirely and the 

 apex of the posterior tibis\), black ; tips of the tarsi also blackish. Ab- 

 domen elongate, rather slender, basal segment bilineated and finely 

 aciculate ; basal foveae of the second segment large and deeply im- 

 pressed ; apical segments smooth and shining ; the second and third 

 segments yellowish-fulvous, the anterior half of the second segment 

 paler; beneath colored same as above. Length 5 lines; expanse of 

 wings 1^ lines. 



jjah. — Rocky Mountains, Colorado Territory. 



38. Ich. bizonatus. n. sp. 



Black : face, annulus on antennse, scutellum, legs in part, and two bands on ab- 

 domen, yellow: wings subhyaline; central area of metathorax large, quadrate. 

 Female. — Head black, shining, sides of the face and frontal orbits, 

 yellow, the latter tinged with ferruginous near the summit of the eyes ; 



