08 BULLETIN 45, UNITED STATES NATIONAL MUSEXTM. 



posterior cox;e above, tlie middle tibiic above, and the posterior femora 

 and tibise above, more or less piceous. Antennsie 10-joiiited, reaching 

 to the ti]) of metathorax, incrassated toward the tips, the temiinal 

 joint twice as hmg as the penultimate; the pedicel stouter but not 

 longer than the first tiagellftr joint, the joints beyond submoniliform. 

 The collar is about one-third the length of the mesonotum, above 

 finely, transversely ruguh)se; mesonotum without furrows; scutellum 

 smooth, polished, with a row of punctuies surrounding the ])osterior 

 margin; metathorax finely rugose. Wings hyaline, the veins ]»ale, 

 the stigma large, brown, with a pale spot at base, the stigmal vein 

 short. Abdomen small, ovate, subpetiolate, smooth and shiuing, about 

 as long as the thorax, excluding the collar. 



Habitat. — Washington, I). C. 



Type in Coll. Ashmead. 



Described from a single specimen given to me by E. A. Sclnvarz. 

 The species is the smallest known, and could easily be mistaken for a 

 small Aphelojms. 



Anteon Popenoei AsLm. 



Dryinits Popenoei Ashm., Bull. No. 3, Kuns. Exper. Sta., App., }>. 1, June, 1888. 



^ . Length, 2""". Black ; head subopaque, microscopically punctuate ; 

 thorax and abdomen polished, black; metathorax and mesopleura 

 finely rugose; the superior edge of the truncature in the former mar- 

 gined. Clyi^eus anteriorly arcuate, smooth. Mandibles 4-dentate, pale 

 brown. Antennae 10-jointed, brown, with sparse, long, white hairs; 

 pedicel small, half the length of the scape; first fiagellar joint longer, 

 but shorter than the fourth; fourth joint and those beyond, except the 

 last, nearly equal, about as long as the scape. Wings hyaline, the 

 stigma large, pale-brown, the stigmal vein short. Legs, including coxa?, 

 reddish-yellow. 



Habitat. — Eiley County, Kansas. 



Type in Kansas State Agricultural College. 



MYSTROPHORUS Fnrster. 



Hym. Stud., n, p. 91 (1856); Eiithe, Berl. Eiit. Zcits., 1859, p. 120. 



(Typo M. forDiicd'formis Eutbe.) 



Head large, broad, subquadratc, lu^arly twice broader than the tho- 

 rax, the occiput not emarginate; ocelli 3, triangularly arranged; eyes 

 oval. 



Antenna' in both sexes l<>-)ointed, in 9 subclavate, the pedicel small, 

 the first fiagellar joint a little longer and slenderer than the scape, thes 

 following shorter. 



^Faxilhuy ])ali)i 4 jointed; labial ])al]>i L'-jointed. 



Mandibles truncate at tips, with -> nearly <M|ual, acute teeth. 



