1908] Brues, North Avierican Parasitic Eymcnoptera VI. 
51 
extend only to its posterior third ; second and third segments sub- 
equal, each slicrhtly broader than long*. Leg's moderately stout ; 
anterior and middle pairs, except coxje, fulvous ; posterior pair, except 
coxffi in part, tarsi, tips of tibite, and tips of femora above, ferruginous. 
Clypeus and antennne rufous, the former somewhat paler below^. Palpi 
pale. Abdomen except the basal two-thirds of the petiole and extreme 
tip more or less ferruginous. Wing's slightly infuscated ; stig-ma 
elongate, piceous, veins piceous. Areolet very nearly regularly pen- 
tagonal ; transverse median A^ein in hind wing broken just below the 
middle. 
Described from two specimens collected by Professor T. D. 
A. Cockerell in a marsh at Florrissant, Colorado, July 26, 1908. 
This species does not agree with the genus as characterized by 
Davis (Trans. Amer. Ent. Soc, Vol. 24, p. 322 (1897) ), and 
Mesoleptns facetiis Cress, which he refers to Oxytonis is evidently 
not congeneric with the present species, which however, agrees 
well with the characters given by Schmiedeknecht (Hyni. Mit- 
teleuropas, p. 621.) 
TRIBE BASSINI. 
Promethes rohweri, sp. nov. 
Female. Leng-th 4.25 mm. Black ; face, underside of antennae ; 
marks on thorax and bands on abdomen, light yellow; legs light 
yellow and fulvous, to a slight extent variegated with black. Head 
about three times as wide as thick, smooth and polished, with faint 
indications of punctulation on the vertex and cheeks. Face smooth 
and highly polished, its central portion slightly elevated. Clypeus 
sharply separated from the face, rounded above, its lower margin 
deeply and broadly notched. Cheeks almost half the length of the 
eyes. Antennai 22-jointed, distinctly shorter than the body ; first 
flagellar joint as long as the scape; second two-thirds as long and 
about three times as long as thick ; following gradually decreasing, 
the fifth twice as long as thick. Mesonotum shining, faintly punctu- 
late, without trace of furrows. Scutellum shining, strongly convex. 
Metathorax incompletely areolated, the basal median, and first lateral 
areas indicated ; second lateral area partly enclosed ; petiolar absent. 
Mesopleura? smooth and highly polished, pro and metapleurte punctu- 
