ART. 23 NEW AMERICAN ICHNEUMON-FLIES CUSHMAN 7 



BRACHYCRYPTUS NIGER, new species 



Female. — Length 7.5 mm.; antennae 5 mm. 



Temples very strongly narrowed, slightly convex, sparsely and 

 finely punctate, polished; eyes very large, bulging, convergent below; 

 face about two-thirds as broad as top of frons, opaque, finely and 

 densely punctate; clypeus more coarsely sculptured than the face, 

 transversely rugoso-punctate, very narrowly margined and arcuate 

 at apex; malar space slightly more than half as long as basal width 

 of mandible; upper tooth of mandible slightly longer than lower; 

 frons opaque laterally, shinging medially, with distinct polished 

 scrobes; ocelli small, the diameter of a lateral ocellus shorter than 

 ocell-ocular line and little more than half as long as postocellar fine; 

 antennae filiform, flagellum of uniform thickness throughout, first 

 two joints elongate and equal in length. Thorax: pronotum punc- 

 tate above, obliquely striate in middle, polished in lower angle; 

 mesoscutum shining, sparsely punctate, decUvous anteriorly, notauli 

 sharp, narrow, minutely foveolate, reaching nearly to middle; scu- 

 tellum convex, shining and sparsely punctate basally, longitudinally 

 striato-punctate apically, carinae distinct to middle; mesopleurum 

 and sternum and metapleurum opaque punctate, the mesopleurum 

 shining and more sparsely punctate above and polished in upper 

 posterior corner, sternauli short and broad; propodeum opaque 

 punctate, basal lateral areas shining and sparsely punctate, basal 

 carina only sHghtly curved, apical carina narrowly separated from it 

 medially, with short carinate apophyses, petiolar area very broad and 

 flat; aerolet almost regularly pentagonal; discocubitus unbroken; 

 nervellus broken at the middle, reclivous; legs long, slender, hind 

 tibia slightly longer than femur, basitarsus very nearly as long as 

 other joints combined, pulvillus very small. Abdomen subclavate; 

 first tergite longer than second, very slender, flattened above, poHshed, 

 postpetiole about twice as wide as petiole, slightly decurved, with a 

 distinct longitudinal impression between the spiracles; abdomen 

 otherwise very finely granularly opaque, second tergite nearly as broad 

 as long and more than twice as broad at apex as at base, gastrocoeli 

 very small, spiracles far beyond middle and close to margin; sheath 

 shorter than first tergite. 



Black; first and second tergites narrowly reddish apically; apex of 

 abdomen with a white spot beginning on sixth tergite; wings hyahne, 

 venation black; front legs beyond trochanters and middle and hind 

 femora except at apex testaceous, legs otherwise black to piceous. 



Male. — Differs from female as follows: temples less strongly nar- 

 rowed and more strongly convex; face only slightly narrower than 

 frons; molar space nearly as long as basal width of mandible; antennae 

 slightly tapering apically; thorax dorsally more strongly and densely 

 punctate; nervellus broken distinctly above middle; hind tibia much 



