NO. 2140. AMERICAN CHALCTDOTD HYMENOPTERA—QIRAVLT. 47 



CLOSTEROCERUS UTAHENSIS CINCINNATUS, new variety. 



Male. — Length, 0.70 mm. Differs from the typical form in having 

 the second stripe of the forewing very broad and the basal infmna- 

 tion is somewhat as in calif ornicus. Also from both in having the 

 body more shiny, the sculpture more delicate. Mandibles tridentate. 



From a female on a tag, "Par. on a Cynipid, J. U. Lloyd, Cincin- 

 nati, Ohio, July 1, '95. 463°2." 



Type.— Cat. No. 19606, U.S.N.M., the above specimen, and the head 

 and pair of wings on a slide. 



HEMIPTARSENOroEUS AMERICANUS. new species. 



Female. — Length, L75 mm. Differs from semialhiclavus in having 

 the stigmal vein over a third the length of the marginal. 



Dark metallic green, the antennal club silvery white, the following 

 parts fulvous: The abdominal petiole and a large V-shaped area 

 dorsad, its apex at base and each arm extending to about middle; 

 proximal two-thirds of abdominal venter except the lateral margins 

 narrowly; the legs except the cephalic concolorous coxae, the ends 

 and middle of the sides narrowly of cephalic femora and the white 

 tarsi; scape and pedicel (lighter). Distal tarsal joint dusky; also 

 more or less of the hind tibia. Funicle black. Forewings lightly 

 smoky from base of the marginal vein distad to the apex, the infusca- 

 tion more or less irregular. Funicle subcompressed, 1 two and one- 

 half times longer than wide, 2 and 3 subequal, but 3 stouter, each 

 longer than 1; 4 as stout as 3, subequal to the club, shorter than 1, 

 distinctly longer than the pechcel and a third shorter than 3. Club 

 1 distinctly longer than 2. Antennae inserted in the middle of the 

 face, the club with a short termmal spine. Mandibles 5-dentate. 

 Head and thorax scaly punctate, the propodeum more coarsel}^, with 

 a delicate, nearly complete, long median carina and one irregular 

 lateral one (composed of several crooked rugae). Spiracle minute, 

 round, cephalad. Middle femur above metallic. Postmarginal vein 

 a third or more longer than the slender stigmal. Abdominal petiole 

 very short. Segment 2 of the abdomen longest, occupying about a 

 fourth of the surface, the abdomen flat above, keeled beneath. 

 Axillae advanced half way into the scutum. Propodeum long. 



From a female captured in the forest, District of Columbia, May 

 11, 1915. 



Type.— Coii. No. 19624, U.S.N.M., the above specimen on a tag, the 

 head and forewing and the hind tibia on a slide. 



A somewhat similar species occurs in Australia. 



