ICHNEUMONID^. Ill 



mainder smooth snd shining; second segment with a short raised channel at 

 base. Length 3 lines. 

 Hah. — Illinois. (Dr. S. Lewis.) 



B. frontalis. — J. Black; spot on middle of face, sometimes the margins of 

 clypevis, spot on mandibles, palpi, tegulse, a spot or a cuneiform mark in front, 

 a short line beneath, and spot at tip of scutellum, white; legs honey -yellow, 

 tips of posterior femora, their tibiae, except base which is pale, and their tarsi 

 black; wings hyaline, iridescent, nervures brown, areolet wanting; antenuse 

 as long as body; body smooth, somewhat shining, without any distinct punc- 

 tures ; abdomen depressed. Length 2 — 2J lines. 



Hah. — Conn., Pa., Ills. Eight specimens. 



B. concinnus. — 9- Black, shining ; anterior orbits, clypeus, mandibles, palpi, 

 tegula;, spot before, two beneath, scutellum and postscutellum, lemon-yellow ; 

 clypeus bilobed at tip; antennae subrobust, langer than head and thorax ; body 

 subpubeseent ; mesothorax shining, feebly punctured; metathorax rugulose 

 down the middle; wings hyaline, iridescent, nervures and stigma brown, areo- 

 let wanting; legs pale honey-yellow, anterior coxae, all the trochanters, and 

 tips of femora, yellow; posterior tibise white, tips of the latter and their tarsi 

 entirely black; abdomen entirely black, rugulose at base, smooth and shining 

 at tip, first segment equilateral. Length 2J lines. 



Hah. — Connecticut. (Coll. Mr. E. Norton.) 



B. frigidus. — 9- Robust, black, finely pubescent; clypeus, mandibles, palpi, 

 tegulse, and a dot before, yellowish-white; clypeus broadly rounded at tip; an- 

 tennae slender, filiform, as long as the body ; pleura, except space beneath wings, 

 flanks of metathorax, and legs, honey-yellow; metathorax with sharply de- 

 fined longitudinal carinae, and a transverse one at the verge of truncation, which 

 latter is abrupt: wings hyaline, iridescent, nervures and stigma brown, areolet 

 wanting; posterior tibiae and tarsi whitish, annulated with black, tips of pos- 

 terior femora also black ; abdomen short, robust, rugulose, smoother at tip. 

 Length 2J lines. 



ifafi.— Great Slave Lake, H. B. T. (Coll. Mr. E. Norton.) 



B. agilis. — %. Small, black; all beneath antennae, lower part of cheeks, scape 

 beneath, large mark on each side of mesothorox, tegulae, spot before, tip of scu- 

 toUums, pleura, except large mark beneath wings, base of four anterior legs, 

 and basal spot on each side of third abdominal segment above, yellow; clypeus 

 depressed, subtruncate at tip ; antennae as long as body, slender, testaceous be- 

 neath ; metathorax smooth and rounded; wings hyaline, iridescent, nervures 

 and stigma brown, areolet wanting; legs pale honey-yellow, posterior tibiae and 

 tarsi blackish, base of the former more or less, and their spurs pale; abdomen 

 depressed, shining, first segment longer than broad, with a prominent lateral 

 tubercle before the middle; basal fovese of second segment deep and palish 

 and sometimes the apical margin of third segment is pale ; venter more or less 

 pale. Length 2 lines. 



Hah. — Connecticut, (Norton), Illinois (Dr. Lewis.) 



B. pleuralis. — -J. Black, subopaque, densely and finely sculptured; spot on 

 middle of face, clypeus, mandibles, palpi, cuneiform mark on each side of meso- 

 thorax, tegulse, spot beneath, most of scutellum, and the postscutellum, whitish ; 

 clypeus depressed, apex truncate; antennae slender; flanks of metathorax, pleura, 

 excei)t sjjace beneath wings, and the legs, honey-yellow; metathorax rounded, 



