12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



PSEN (PSENEO) SPICATUS. new species 



M(de. — Shining black. Antennal scape shining black, flagellum 

 dark dull brown, the basal 4 or 5 segments brownish yellow below; 

 hairs of face silvery white. Prothoracic lobes and abdominal peti- 

 ole black. Legs black to brownish black, the tarsi more noticeably 

 brown. Wings grayish hyaline, veins and stigma dark brown, the 

 (;osta with a brown tinge in cell beyond the stigma. 



Frons glossy, with large deep punctures, which are contiguous in 

 front and to some extent on sides, the impressed line behind posterior 

 ocelli distinct; antennal flagellum very slightly thickened apically, 

 the basal segment longer than the scape, segments 2 to 9 each with 

 a small pimplelike elevation near middle on one side that is most 

 distinct on 6 to 8 and sometimes slightly linear on 2 and 3. Thorax 

 almost as in fulvipes^ but the lower part of the mesopleura (eps 

 1) is less closely punctured and lacks definite rugae; propodeum 

 with the enclosure rugose on entire extent, no smooth central dia- 

 mond-shaped area present. Petiole as in the preceding species. 

 Legs and wings normal. The most conspicuous feature of the 

 species, and the one which gives it its name, consists of the spikelike 

 projection on each lateral angle of the pronotum. 



Length, 10.5 mm. 



Type (U.S.N.M. No. 44207) and tioo paratypes. — From Beulah, 

 N.Mex., August 8, 1900 (T. D. A. and W. P. Cockerell). 



PSEN (PSENEO) ANGULATUS. new species 



Male. — Differs from spicatus in the paler-colored legs, the tibiae 

 being yellowish at base and apices and the tarsi almost entirely 

 yellow. The bases of the flagella are more completely yellow. 

 Petiole of abdomen red. 



The antennal structure differs from that of spicatus as stated in 

 the key, and the prothorax has the angles very much less produced. 



Length, 9 mm. 



ry^e.— U.S.N.M. No. 44208, from Nelson County, Va., August 10, 

 1924 (W. Eobinson) ; paratype, Eoxborough, Pa., September 28, 

 1908 (C. T. Greene). 



Subgenus PsEN Latreille 



Reference as under genus, page 6. 



Our conclusions as to the identity of this subgenus are based upon 

 an examination of the type of the segregate in the collection of the 

 National Museum. The male differs from that of any found in 

 North America which are retained herein in having the antennal 

 flagellum flattened, most of the segments except a few at the base 

 having an oblique groove or depression on one surface, and the 



