1897.] NATURAL SCIENCES OF PHILADELPHIA. 271 



dark, second submarginal subquadrate, about one-third the size of 

 third, and receiving first recurrent vein in middle, third submarginal 

 large, narrowed about one-third to marginal, receiving the second 

 recurrent vein between base and middle. Length 12 mm. 



Santarem. Two specimens. Bears a superficial resemblance to 

 congruus, but is quite distinct in the forms of clypeus, etc. 



Salius (Priocnemis) egensis D. T. (=Priocnemis opulentus Sm.). 



Santarem. One specimen. This species has a remarkable resem- 

 blance to Pompilus regius Fabr., but it is purely superficial, as the 

 subpetiolate abdomen and serrated hind tibia? of egensis easily dis- 

 tinguish it from regius. 



Salius (Priocnemis) nigerrimus n. sp. 



9 . — Deep black ; without pale pubescence; fore margin of clypeus 

 subtruncate, or slightly incurved ; front impressed, but not strongly ; 

 eyes almost reaching base of mandibles, inner orbits parallel, the 

 space between them at top about equal to the length of the first and 

 half of the second joints of flagellum ; space between hind ocelli 

 much less than that between them and eyes ; antenna? fairly slender, 

 the first joint of flagellum longer than second ; pronotum angulate 

 behind ; middle segment rounded, feebly impressed down middle, 

 legs not strongly spinose, serration of hind tibia? distinct, longer spur 

 of hind tibia? equal to about two-fifths of the length of first hind 

 tarsal joint ; wings dark fuscous, with purplish reflection, third sub- 

 marginal cell receiving the second recurrent vein in the middle, 

 twice as large as the second, which receives the first recurrent vein 

 in the middle. Length 12 mm. 



Chapada (April). One example. 



Salius (Priocnemis) hexagonus n.sp. 



9 . — Dark steel-blue or green, thorax black ; dorsulum and 

 scutellum with golden pile, that on thorax on sides and beneath, 

 silvery ; tarsi testaceous ; antennal joints seven and eight and ninth 

 beneath, yellow ; clypeus large, hexagonal, distinctly punctured 

 anteriorly, broadly truncate ; eyes not reaching base of mandibles, 

 space between them at top greater than length of antennal joints 2 

 and 3 ; space between hind ocelli less than that between them and 

 eyes ; first joint of flagellum fully one-third longer than second which 

 latter is shorter than any of the following, except, perhaps the last; 

 head large, subquadrate, but not wider than thorax ; thorax robust ; 

 pronotum short, rounded behind, transversely swollen anteriorly ; 



