1897.] NATURAL SCIENCES OF PHILADELPHIA. 249 



Pompilus bilunulatus Sauss. 



Rio de Janeiro (November). One male. 

 Pompilus exclusus Sin. 



Santarem. One specimen. 

 Pompilus insignitus n. sp. PI. IV, f. 8. 



$ . — Black, with rather dense silken pile, which is silvery on face, 

 sides of scutellum, postscutellum and middle segment posteriorly ; 

 hind margin of pronotum (which is arcuate), fascia at base of second 

 dorsal segment, a spot at apex of fore femora, and short stripe on all 

 tibia? externally, yellowish ; five or six basal antennal joints beneath 

 fulvous ; clypeus subtruncate, about twice as wide as long in the 

 middle; eyes slightly separated from base of mandibles, at the top 

 the distance between them is about equal to the combined length of 

 the scape and following two antennal joints ; space between hind 

 ocelli somewhat less than that between them and eyes ; antenna? 

 short, barely as long as head and thorax, at any rate not longer, first 

 and second joints of flagellum about equal in length ; middle segment 

 rounded behind ; legs tolerably spinose, fore tarsi feebly so, claws 

 bifid, longer spur of hind tibia? almost equalling the first hind tarsal 

 joint; abdomen with apical margin of segments, as well as legs, 

 obscurely brownish ; wings subhyaline, the anterior portion of supe- 

 riors darker particularly from marginal cell to apex, third submar- 

 ginal longer than second beneath, at the top, however, nearly one- 

 half shorter. Length 9-10 mm. 



Santarem. Five specimens. 



Pompilus singularis n. sp. PI. IV, f. 9, 10. 



$ . — Bluish-purple, when held in certain lights changing to 

 black ; antenna? entirely black ; head very transverse, nearly one- 

 third broader than long ; eyes very shortly ovate, scarcely separated 

 from base of mandibles, diverging above, at which place they are 

 separated by a distance about equal to the posterior width of prono- 

 tum ; ocelli almost forming a curved line, the hind pair separated by 

 a distance about equal to half that between them and eyes ; front 

 with distinct, even punctures, medially impressed ; clypeus finely 

 punctured at base, striato-punctate apically broadly truncate; labrum 

 prominent ; antenna? distinctly shorter than head and thorax, thick ; 

 pronotum angulate posteriorly ; scutellum and postscutellum (meta- 

 notum) prominent and elevated, finely punctured, the postscutellum 

 at sides coarsely obliquely striated ; middle segment much lower than 



