ALT. 20 WASPS OF SUBFAMILY PSENINAE MALLOCH 55 



three times as long as its width at center. The head is as in rufihash, 

 but the intereai-inal space is even narrower in center, there is a quite 

 marked thickening or angle of the occipital carina on each side in 

 line with the lower margin of each eye which is not evident in most 

 of the other species, the antennal scape is fuscous, and the hairs of 

 the face are white. 



Length, 8 mm. 



Originally described from Los Angeles County, Calif. The sin- 

 gle female before me, in addition to the type, is from Lindsay, 

 Calif., on Asclepias (W. A. Davidson). 



The correct type number of this species is U.S.N.M. No. 12855, 

 not 12355 as published. 



PSENIA SAYI (Rohwer) 



Psenulus (Ncofoxin) sai/i Rohwer. Proc. Ent. Soc. Wasliiugton. vol. 12. p. 100, 

 1910. (Female.) 



This species is one of a group in which the hind tar.si are fuscous, 

 with the apices of the basal 4 segments narrowly yellow, which an- 

 nulation is best seen when the tarsus is viewed from the tip against 

 the light. The various species are best distinguished by the sculp- 

 ture of the mesopleura and the propodeum as stated in the fore- 

 going key. 



The mesopleura in the male is more distinctly shining than in the 

 female, and the punctures are larger, especially on the upper por- 

 tion and posteriorly on the lower portion, on the latter assuming the 

 appearance of reticulations or irregular striae. The petiole of the 

 abdomen in the male is also longer than in the female, in some speci- 

 mens almost as long as the hind femur. The fore and mid femora 

 are yellow above to a variable extent in both sexes, the abdomen in 

 the male has in the Alabama and Louisiana specimens a preponder- 

 antly blacker tone than in the series before me from Arizona, the 

 apices only of the first and second and the base of the second ter- 

 gites being more or less broadly reddish, while in the Arizona speci- 

 mens the entire second segment and a large part of the anterior half 

 of the third segment are red. The Arizona specimens are also 

 slightly longer and slenderer, though it is my opinion that they 

 belong to this species. I have seen no females from Arizona that I 

 can refer here. The available females are all from farther east, and 

 all have the apex of the first, all of the second, and at least the basal 

 half of the third tergite red. The flagellar elevations of the male 

 are linear and are present on the third to tenth segments as a rule, 

 though there may be a very faint trace on the second and sometimes 

 hardly a trace on the tenth segment. The space between the carina 



