18 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



claws are entirely toothless. Of the genera beyond this point it 

 agrees best with Odontaulacus Kieffer, from which it differs, in addi- 

 tion to its lack of claw teeth, in its short ovipositor and the lack of 

 ovipositor guides on the hind coxae. 



Frons convex, without scrobes or carinae ; occipital carina effaced ; 

 eyes bare ; pronotum with anterior margins rounded ; prescutum with 

 a shallow median fovea anteriorly, the lobes rounded; propodeum 

 strongly elevated; stigma very broad with radius beyond middle; 

 second intercubitus represented by a very short stub on radius ; third 

 intercubitus very largely hyaline; first recurrent about two-thirds 

 its length before first intercubitus; first brachial cell as broad as 

 long ; hind wing with mediella, basella, cubitella, and nervellus some- 

 what developed, nervellus slightly antef ureal; hind coxae in female 

 without ovipositor guides; claw^s without teeth; abdomen in female 

 little longer than thorax, broadly truncate at apex ; ovipositor sheath 

 barely as long as abdomen. 



Genotype. — Pycnaulctcus hrevicaudus, new species. 



PYCNAULACUS BREVICAUDUS, new species 



Female. — Length, 6 mm. ; antennae, 4 mm. ; ovipositor sheath, 2.5 

 mm. 



Head smooth; malar space and sides of face very densely and 

 finely punctate opaque ; frons more sparsely and less finely punctate ; 

 first and third joints of flagellum subequal in length and about two- 

 thirds as long as second joint, others gradually shorter, penultimate 

 joint twice as long as thick; transverse rugae of prescutum very 

 coarse, those of scutellum fine, lateral lobes of mesoscutum with only 

 one prominent carina, this at about the middle with much finer 

 rugosity before and behind; thorax laterally confused rugose, with 

 the impressions of pronotum and mesopleurum shining and more dis- 

 tinctly rugose, upper division of metapleurum polished; propodeum 

 concentrically rugose before, reticulately rugose behind, insertion of 

 abdomen. 



Head and thorax black; antennae black with scape pale testaceous 

 and pedicel brown ; mandibles dark piceous ; legs beyond coxae testa- 

 ceous; wings yellowish hyaline, immaculate; tegulae brownish testa- 

 ceous; abdomen ferruginous more or less darkened toward apex, ex- 

 treme base of petiole black. 



Type locality. — Palo Alto, Calif. 



Type.— Cat. No. 42160, U.S.N.M. 



One specimen captured May 14, 1922, by E. O. Essig. 



U. S. GOVERNMENT PRINTING OFFICE: 1923 



