D PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64. 



sparsely punctate, polished and impunctate laterally, metapleurum 

 subopaque: propodeum longitudinally rugulose between the trans- 

 verse carinae. shining before and behind. First and second tergites 

 very denselj- opaquely punctate basad of the transverse furrows, 

 polished bej^ond. second with a transverse longitudinally striate im- 

 pression just before the furrow; third tergite polished; ovipositor 

 sheath two-thirds as long as first tergite. 



Black; clypeus piceous; scape and pedicel, mandibles, palpi, 

 tegulae, and legs (largely) stramineous to pale testaceous, the palpi 

 palest and the hind legs with the most red, hind femur and tibia and 

 all tarsi apically infuscate; wings hyaline, venation, except costa, 

 pale. 



Male. — Smaller and more slender; antennae 15-jointed; otherwise 

 like female. 



Type locality. — Agricultural College, Michigan. 



Allotype locality. — Algonquin, Illinois. 



Type.— C^t. No. 25916. U.S.N.M. 



One female (type) bearing the label "Ag. Coll. Mich., 234," and 

 one male (allotype) labeled " 5.10.96-151 " and also the number 

 6714; also one female (paratype) taken at Madison, Connecticut, July 

 25, 1919, by W. E. Britton. 



TRIBE CRYPTINI. 

 CRYPTOIDEUS BITUMINOSUS, new species. 



In my key to North American species ^ runs directly to Ivctuosus 

 (Provancher), from which it may at once be distinguished by the 

 very indistinct sternauli not at all indicated posteriorly ; first flagel- 

 lar joint distinctly longer than second ; immaculate wings ; long and 

 distinct notauli; propodeum coriaceous before and punctate behind 

 basal carina. The propodeal spiracles are only slightly oval though 

 distinctly not round as in agrili (Viereck) ; and the malar space is 

 only slightly longer than the basal width of mandible. 



From agrili it is at once distinguishable by its lack of antennal 

 annulus and immaculate, pale infumate wings as w^ell as by the 

 structural character used in the key. 



Female. — Length 8.5 mm. ; antennae 6.5 mm. ; ovipositor 2 mm. 



Temples narrower than eyes, evenly convex; cheeks from in front 

 weakly convex; malar space slightly longer than basal width of 

 mandible; vertex, frons and face confluently punctate; inner orbits, 

 malar space and temples shagreened, the last sparsely punctate; 

 cheeks polished and sparsely punctate. Mesoscutum opaque sha- 

 greened, finely and densely punctate; scutellum polished, sparsely 

 punctate; pleura and propodeum coarsely, confluently punctate, the 



'Proc. U. S. Nat. Mus., vol. 55, 1919, p. 536. 



