50 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



PSENIA ALBIFACIES, new species 



Female. — Very similar to the female of tibialis.^ differing in having 

 the abdomen without distinct pale apices to central part of the 

 tergites, the pygidium not so long or so narrow, the occipital carina 

 obsolescent as it nears the central line on ventral surface of head 

 and the intercarinal space rather wider. The enclosure of the pro- 

 podeum is quite similar to that of tibialis.^ but the striae on upper 

 part of the lateral areas outside of it are finer. The mesopleura is 

 also more finely punctured, especially on eps 1, where it is rather 

 distinctly shining. 



Length, 8 mm. 



ry;?£'.— U.S.N.M. No. 44220, from Sioux City, Iowa, July 13. 1929 

 (C.N. Ainslie). 



PSENIA CLAVICORNIS. new species 



Plate 2, Figure 35 



Male. — A small shining black species much resembling a small 

 specimen of suffusa^ but the abdomen has a narrow reddish apex to 

 the first and second tergites and the apices of the following tergites 

 3^ellowish brown. The face is silvery white haired, the antennae 

 are testaceous-yellow, with the scape and upper surface of the 

 flagellum fuscous. Femora dark brown except at apices, tibiae and 

 tarsi testaceous-yellow, hind pair yellowish brown except at bases, 

 the latter not very much paler than the remainder, hind tarsus with 

 the apical segment hardly darker than basal four. Stigma and 

 wing veins brown. 



Frons glossy, appearing impunctate except under a very high- 

 power lens, the ocelli well elevated, the surface sunken between the 

 ocelli, the distance between the posterior pair subequal to that be- 

 tween either and eye margin; antennal flagellum about as long as 

 head and thorax, much clubbed apically, the penultimate and ante- 

 penultimate segments distinctly wider than long, and no segment 

 with distinguishable sensory elevated area. Mesonotum and scutel- 

 lum with small widely separated punctures on a glossy surface; 

 mesopleura glossy, eps 2 apparently impunctate, eps 1 with very 

 small piliferous punctures, which are widelj^ separated and visible 

 only under a magnification of about 50 diameters; propodeum with 

 the sculpture rather coarse, enclosure as in plate 2, figure 35, the areas 

 laterad of it quite widely striate, becoming rugoso-reticulate on the 

 curve and posterior face. Abdomen slender, petiole about four fifths 

 as long as hind femur, gradually merging into the thickened part, 

 which is not half as wide at apex as its length from there to petiole ; 

 basal exposure of third tergite not half as wide as length of sternite 

 in center. Legs and wings normal for the genus. 



Length, 6,5 mm. 



