1897.] B NATURAL SCIENCES OF PHILADELPHIA. 275 



or a little incurved ; eyes slightly separated from base of mandibles, 

 converging distinctly above, separated at the top by a distance 

 scarcely equalling the first joint of flagellum; ocelli large, the space 

 between hind pair decidedly greater than that between them and 

 eyes ; pronotum angulate behind, somewhat swollen antero-laterally ; 

 middle segment rounded, feebly impressed, subopaque ; legs strongly 

 spinose, the serration of hind tibise very strong ; longer spur of hind 

 tibiae equal to a little more than one-third of the length of the first 

 hind tarsal joint ; abdomen subsessiie, robust, apical segment densely 

 clothed with brown hairs ; wings pale fuscous, with purplish reflec- 

 tion, apex paler, hind wings paler, not resplendent with purplish, 

 second submarginal cell narrow, elongate, receiving the recurrent 

 vein a little beyond middle, third submarginal much larger, nar- 

 rowed about one-quarter above, reciving the second recurrent before 

 the middle. Length 24 mm. 



Santarem. One specimen. Differs from the two preceding in 

 color of wings, larger size, etc. 



Salius (Priocnemia) luteicornis Lep. 



Rio de Janeiro (November). One example. 



Salius (Mygnimia) carinatus Lep. 



Chapada (March, October, December) ; Corumba (April). Five 

 specimens. 



Salius (Mygnimia) bituberculatus Guerin. 



Three specimens. Rio de Janeiro (October, November) ; Santa- 

 rem. This is the Pompilus bituberculatus Guerin. Four specimens 

 which may be the male of this species, resemble the female in colora- 

 tion, are as a rule smaller, and the second ventral segment lacks 

 the long, teat-like tubercles so characteristic of the female. The last 

 ventral plate is carinated down the middle, rounded at apex. These 

 males came from Rio de Janeiro, Santarem and Chapada. 



Salius (Mygnimia) mammillatus n. sp. 



9 . — Resembles bituberculatus, but is black, with slight purplish 

 pile; antenna? with joints 1, 2 and 3 except apex, black, four and 

 five orange-yellow, the remainder missing ; clypeus with long black 

 hairs, its fore margin broadly subtruncate ; front distinctly impressed ; 

 eyes just about reaching base of mandibles, converging above, the 

 space betwen them at top about equal to length of fourth antennal 

 joint ; ocelli approximate, the space between hind pair less than half 

 of that between them and eyes ; pronotum angulate behind ; poste- 



