248 PROCEEDINGS OF THE ACADEMY OF [1897. 



as second ; pronotum subangulate behind ; middle segment rounded, 

 not impressed ; legs rather strongly spinose, claws with a rather long 

 central tooth giving them the appearance of being bifid, calcaria 

 and tarsi at base yellowish, longer spur of hind tibiae not equalling 

 two-thirds the length of first hind tarsal joint ; abdomen not pilose, 

 microscopically punctured, beneath and at apex with sparse hairs ; 

 wings yellowish, dusky at tips, the venation practically the same as 

 in vinicolor. Length 10-11 mm. 



Chapada (March, December). Two specimens. 



Pompilus familiaris Sin. 



Twelve specimens. Uacarizal (February) ; Chapada (April, 

 May) ; Corutnba (April). 



Pompilus argenteomaculatus n. ?p. PI. IV, f. 7. 



$ . — Black, with sericeous pile, especially on the abdomen which 

 has a grayish appearance ; face, clypeus, cheeks, prothorax anteriorly 

 and its posterior margin, short stripe on dorsulum near tegulse, post- 

 scutellum, greater part of middle segment, coxse more or less, and 

 spot on mesopleurae beneath, silvery, pertaining to golden in some 

 examples; leg spines, calcaria and mandibles medially, reddish ; 

 clypeus short, more than three times broader than long, fore margin 

 incurved ; eyes reaching base of mandibles, separated above by a 

 distance equal to less than length of first flagellum joint ; space be- 

 tween hind ocelli equal to or slightly less than that between them 

 and eyes ; first joint of flagellum about one-third longer than second ; 

 pronotum angulate behind; middle segment rounded, not impressed, 

 the posterior surface somewhat flattened ; legs fairly spinose, tarsal 

 comb short and feeble, claws with a sharp medial tooth, longer spur 

 of hind tibia? somewhat more than half as long as first hind tarsal 

 joint ; abdomen ovate, first segment rounded anteriorly, beneath 

 sparsely and the apex with long black hairs ; wings subhyaline, the 

 costal half of superiors and apical margins much darker, third sub- 

 marginal much larger than second, its width at top nearly twice 

 greater than the corresponding portion of second. Length 13-14 

 mm. 



Chapada (December, February, March). Three specimens. 



Pompilus imitator Sin. 



Santarem. Five specimens. 

 Pompilus turcicus Fabr. 



Santarem ; Uacarizal (February) ; Corumbii (March, April) ; 

 Chapada (November). Six specimens. 



