AUT. i;6 WASPS OF SUBFAMILY PSENINAE MALLOCH 35 



The wings in the males placed with the type of coquilUtti are not 

 Avhite but yellowish hyaline, and the costal vein is not paler than the 

 radial vein except at extreme base. 



I leave these male specimens without a definite name but consider 

 that they belong to a species unknown to me in the female sex. 



Locality, Los Angeles County, Calif. (Coquillett). 



PSEN (MIMESA) POLITUS, new species 



Male and female. — Shining black, underside of antennal flagellum 

 broadly yellow, facial hairs silvery white, the pleura so densely 

 covered with short silvery hairs that they practically obscure the 

 sculpture on most of the upper portions of the mesopleura ; abdomen 

 in male with apex of first, all of second, and anterior half or more 

 of third tergite red, that of female with all of first to third tergites 

 red; coxae, femora, and apical two thirds of hind tibiae blackened, 

 remainder fulvous-yellow; wings whitish hyaline, veins and stigma 

 fuscous, base of latter and most of costal vein up to stigma yellowish. 



Male. — Slender, the abdomen about 1.5 as long as head and thorax 

 combined. Antennal flagellum distinctly clubbed, penultimate and 

 antepenultimate segments about as thick as long, no segments with 

 distinct sensory elevations; front glossy, with small isolated punc- 

 tures; ocelli quite large, the distance between the hind pair greater 

 than that of either from eye; interantennal elevation slight, with- 

 out an upwardly continued ridge; clypeus with a small, moderately 

 deep rounded central excision in anterior margin; head broader 

 than high. Mesonotum and scutellum glossy, with rather small deep 

 isolated punctures ; mesopleura glossy, eps 2 with very fine and rather 

 irregular longitudinal striae ; propodeum with the enclosure poorly 

 differentiated, the sculpture consisting of fine longitudinal striae 

 which are eliminated just beyond the margin of the enclosure so that 

 there is a rather large bare, slightly alutaceous area on each side 

 that extends almost to the curve, where the striae begin again but so 

 faintly that the posterior face appears to be merely granulose. 

 Petiole a little shorter than hind femur and about 1.5 as long as the 

 swollen part of the first segment, longitudinally convex above and 

 with the laterodorsal carina very poorly developed, the lateroventral 

 one only partially present. Legs and wings normal, second cubital 

 cell little narrowed above. 



Female. — Differs from the male as usual in having the puncturation 

 of the front much weaker, almost lacking, and the clypeus with the 

 anterior margin rounded, the preapical elevation quite small and 

 prominent. This last feature is usually a female character, as it 

 is in this species, but more generally the elevation is more trans- 

 verse, forming a slightly raised and rather poorly margined ridge 

 that extends across about one third of the width of the clypeus. 



