A.iT.2t5 WASPS OF SUBFAMILY PSENINAE MALLOCH 57 



mentarily so on apical one; intercariiial space on center of ventral 

 surface of head almost linear; front finely punctured, more glossj^ 

 and less closely punctured between ocelli ; space between posterior 

 ocelli greater than distance of either from eye. Mesonotuni with 

 moderate sized and quite deep punctures which are not regularly 

 arranged but more aggregated along the linear depressions ; scu- 

 tellum similarly punctured, least closely so on disk, the apex with 

 a central depressed longitudinal line that does not extend to ante- 

 rior margin; mesopleura with deep closely placed punctures about 

 as large as those on mesonotuni, eps 2 appearing rugoso-reticulate. 

 Propodeum as in tibialis, the central part of enclosure without a 

 definite bare glossy diamond-shaped area, and the reticulations ex- 

 tending up to the lateral edges of enclosure. Petiole about as long 

 as the enlarged part of the segment and fully two thirds as long 

 as hind femur. Legs and wings normal. 



Female. — Antennal fiagellum clubbed; clypeus with the central 

 third almost transverse, the extremities of that part with a slight 

 angle. Mesopleura with the punctures much smaller and wider 

 placed than in male, eps 2 striate. 



Length, 7-8 mm. 



Type (U.S.N.M. No. 44227), male, Chesapeake Beach, Md., July 

 3, 1924 (J. E. Malloch) ; allotype, same locality, July 2, 1916 (W. L. 

 McAtee). 



The specimens have been donated to the National Museum by the 

 collectors. 



PSENIA ATRICORNIS. new species 



Male and female. — The male is much darker in color than any of 

 the three next preceding species, having the abdomen appearing 

 entirely black on dorsum except the narrow and rather indistinctly 

 paler apices to the tergites, and the antennal flagellum black except 

 at extreme tip where it is brownish yellow. The female which 1 

 place with this male is marked with red triangles on each anterior 

 lateral angle of the third, and the posterior lateral angles of second 

 and third tergites when seen from above, the incurved ventral parts 

 of the tergites and the sternites of these segments almost entirely 

 red. The antennal flagellum is also yellow below except on the basal 

 segment. The hairs of the face are silvery white in both sexes. 

 The male has the sensory areas of the flagellum much as in littoralis, 

 but the type specimen has the basal two without elevations and the 

 apical one with a partial one at base. The male has the lower part of 

 the mesopleura with large punctures, becoming striato-punctate an- 

 teriorly, and the upper part, eps 2, with small punctures. The fe- 

 male is much less coarsely punctate on these parts, the eps 2 being 

 but feebly punctured. Propodeum as in littoralls. Petiole in male 



