ART. L'6 WASPS OF SUBFAMILY PSENINAE — MALLOCH 49 



PSENIA TIBIALIS (Cresson) 



Plate 2, Figures 27, 33, 38 



Mimesa tibialis Ckesson, Trans. Amer. Ent. Soc, vol. 4, p. 488, 1872. (Male 

 and female.) 



This species is black in both sexes, with a more evident pale pos- 

 terior margin to the segments in the female than in the male, the 

 face is silvery white haired, antennal flagellum broadly yellow below 

 on entire extent except on the first segment, the fore and mid tibiae 

 and all tarsi yelloAv, hind tibiae broadly blackened in middle, to 

 apex on the outer side, hind tarsus of female usually with the apical 

 segment browned above. 



The antennal flagellum of the male is not at all clubbed, while that 

 of the female is distinctly so, the sensoiw areas on the male flagellum 

 are linear, jDresent usually on all but the apical and basal two seg- 

 ments, though there is some variation in the presence or absence on 

 the penultimate, and usuallj^ the last or even the one preceding it 

 is distinctly shorter than the other, not extending along the eutiie 

 length of the segment. The enclosure of the propodeum is irregu- 

 larly rugoso-reticulate (pi. 2, fig. 33), and the areas laterad of the 

 latter are rather coarsely reticulate, the mesopleura is almost dtill 

 becattse of the presence of shagreening, and the puncttires are 

 rather large thotigh not deep, and moderately widely separated, 

 closer on eps 2. The female pygidial area is usually abotit 2.5 as 

 long as wide in center. 



Length, 6-7.5 mm. 



Originally described from Texas and District of Columbia. I 

 have seen it from these localities and also Louisiana. 



The District of Columbia male lacks a sensory area on the apical 

 three flagellar segments. 



PSENIA AEROFACIES, new species 

 Plate 2, Figure 34 



Female. — Very similar to fihmlis, difi^ering essentially in the 

 yellow haired face and the sculpture of the propodeal enclosure 

 \pl. 2, fig. 34). 



Male. — Similar to the male of tibialis, the face being silvery white 

 haired, but the propodeal enclosure is sculptured as in the female. 



Length, 7.5-8.5 mm. 



Type (U.S.N.M. No. 44219), female, Rosser, Tex., June 28, 1905, 

 on Cassia sp.. Hunter No. 450 (C. R. Jones). Allotype, Victoria. 

 Tex., July 8, 1907, on Acacia sp. (J. D. Mitchell). Paratype male. 

 Mexico, no other data (Baker collection). 



175503—33 4 



