52 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



antly red than I describe above, and particularly as he states that 

 the hind tarsi may be entirely yellow or with merely yellow rings. 

 I suspect that a critical examination of the types will disclose that 

 there is a mixture of suffusa as here accepted and sayi Rohwer or a 

 closely allied species. However, I restrict the name to the form 

 with entirely yellow hind tarsi as here described. 



PSENIA LONGIVENTRIS, new species 



Plate 2, Figuke 28 



Male and female. — Very similar to suffusa, differing in its darker 

 color as indicated in the key for both sexes, and in the male in the 

 structure of the antennal flagellum and the sculpturing of the meso- 

 pleura. The specimens average larger than those of suffusa and 

 the enclosure of the propodeum is very similar to that of clavicornis, 

 though the lateral areas are much more finely striate. TJie stigma 

 of the wing in this and the preceding species is fuscous, and the 

 occipital carina is not at all reflexed outward as in paJJidlst'/gma 

 but erect. 



Length, 8-9 mm. 



Type (U.S.N.M. No. 44222), male, and 13 male paratypes, Hig- 

 ley, Ariz., July 15, 1917 (E. G. Holt) ; allotype, Gilbert, Ariz., July 

 18, 1917 (E. G. Holt). Paratypes, all males: 3, Holtviile, Calif., 

 July 26, 1917, one on cotton (E. A, McGregor) ; 12, Lindsay, Calif., 

 on Helianthus, orange, and Ascleplas (W. A. Davidson, C. E. Pem- 

 berton) ; 1, El Centro, Calif., on cotton (W. D. Pierce) ; 2, Mount 

 Superstition, near Higley, Ariz., July 24, 1917 (E. G. Holt) ; and 1, 

 Arizona, without more definite locality (Baker collection). 



PSENIA PALLIDISTIGMA, new species 



Plate 2, Figubes 30, 39 



Male and female. — Very similar in general coloration to suffusa, 

 but the wings are more decidedly whitish hyaline, the stigma is paler, 

 brownish yellow in male, and the male has the abdomen more broadly 

 red, while both sexes have no brown color on the apical segment 

 of the hind tarsus. 



Structurally the male differs from that of either of the two next 

 preceding species in the more elongate sensory areas of the antennal 

 flagellum, which are present on the fourth to tenth segments, in- 

 clusive, and the peculiarly reflexed lower portion of the occipital 

 carina (pi. 2, fig. 30), a character not met with elsewhere in the 

 genus as far as I have found. The female has this feature lacking, 

 but it has the same closely rugoso-reticulate propodeal enclosure as 

 the male (pi. 2, fig. 39), a rather striking character. The mesopleura 



