238 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



vertex broad. Ocelli at angles of au obtuse- angled triangle; eyes 

 sparsely hairy, broadly oval; cheeks longer than eyes; scrobes elon- 

 gate; epistonia with a large, rounded, longitudinal carina; mandibles 

 stout, long, o-dentate, with a long, sharp, apical tooth. Antennae 

 inserted slightly above mouth; scape long, slender, subcylindrical, 

 wslightly swollen near middle and reaching nearly to'top of head; pedi- 

 cel subcylindrical, nearly four times as long as broad; funicle joints 

 short, increasing slightly in width from 1 to G and each about as long as 

 broad; club about two-thirds as long as funicle, broader at base than 

 sixth funicle joint, obliquely truncate from tip to near base. Mesonotum 

 flat, scutftllum slightly elevated, rounded at tip; scapulae narrow, not 

 ([uite meeting at tips. Abdomen flat, broadly oval, pointed at tip. 

 Marginal vein of fore wing very short, broader than long; postmar- 

 ginal much shorter than the rather stout stiguial vein; costal cell of 

 hind wings very narrow but extending nearly to hooklets. 



BERECYNTUS, BAKERI, new species. 



Female. — Length, 1.4 mm.; expanse, 3.4 mm.; greatest width of fore- 

 wings, 0.03. Head and mesoscutum densely and shallowly punctate, 

 Avith irregular, frequently hexagonal punctations, those of head rather 

 finer than the others; mesoscutellum with close, shallow, very elongate 

 l)unctation ; mesopleura faintly longitudinally aciculate. Head, thorax, 

 and abdomen lustrous. General color highly metallic greeu; mesoscu- 

 tellum bronzy; flagellumof antenuaeblack; all legs black exceptfemoro- 

 tibial knees and torsi, which are brown. Wings hyaline, veins dark 

 brown. 



One fenuile collected in Colorado by Mr. 0. F. Baker (Baker's No. 860). 



Type.—^o. 5030, U.S.N.M. 



ASTYMACHUS, new genus. 



Female. — Comes nearest to Aphycus. An elongate", rather slender 

 form. Plead moderately broad, eyes naked, vertex broad, ocelli at 

 angles of a slightly acute-angled triangle; mandibles short, tri-den- 

 tate, teeth subequal. Antennae inserted Just below middle of face; 

 scape short, not widened; pedicel longer than first funicle joint, trian- 

 gular, somewhat longer than wide; funicle joints increasing somewhat 

 in width from 1 to 0, each about as wide as long; club ovate, as long as 

 funicle joints 4, 5, and G together. Mesonotum apparently not arched; 

 scutellum transverse, naked; metauotum naked. Hind femora consid- 

 erably swollen. Abdomen long ovate, perfectly sessile, acute at tip; 

 ovipositor extruded for about one fifth the length of the abdomen. 

 Wings hyaline; marginal vein short but thick; post marginal lacking; 

 stigmal short, but longer thau marginal. 



Male. — Resembles female except in antennae. l^'uuicle joints and 

 club clothed with sh(Ht but rather thick i)ubescence; funicle joint 1 

 longer and narrower thau other funicle joints, about as long as pedicel; 

 club not quite so long as tliree preceding funicle joints. 



