246 PROCEEDINGS OF THE ACADEMY OF [1897. 



sparsely and abdomen with cinereous pile, especially prominent on 

 dorsal segments 4 and 5 ; thorax with slight purplish reflection ; 

 head longer than broad : clypeus large, hardly twice as broad as it 

 is long in the middle, front depressed before anterior ocellus, finely 

 punctured ; space between hind ocelli distinctly less than that be- 

 tween them and eyes ; eyes distinctly separated from base of mandi- 

 bles, separated above by a distance about equal to the fifth and sixth 

 antennal joints ; joints 1 and 2 of flagellum about equal in length ; 

 pronotum angulate behind ; middle segment rounded behind, not 

 impressed ; legs strongly spinose, claws bifid, spurs large, the inner 

 one of hind tibia? nearly equal to four-fifths the length of first hind 

 tarsal joint ; abdomen depressed ; wings fuscous, darker apically 

 and basally with bluish reflection, width of third submarginal at top 

 less than half that of second at same place. Length 13 mm. 



Chapada (March). One specimen. Resembles male of deceptus, 

 but may be distinguished by cinereous band of dorsal segments 4 

 and 5, elongate head, etc. The antennae are also much shorter. This 

 may prove to be the male of either partitus or argenteus. 



Pompilus argenteus Tasch. 



Chapada (December). One specimen. The females of partitus 

 and deceptus are Very similar, superficially, to argenteus. The 

 medially denticulate clypeus and silvery sides of thorax of the latter 

 distinguish it from them, however. 



Pompilus pygidialis Kohl. 



Uacarizal (February) ; Chapada (April). Three specimens. 

 Pompilus fervidus Sm. 



Chapada (March) ; Rio de Janeiro (November) ; Santarem. 

 Seven specimens. 



Pompilus costatus Tasch. 



Six specimens. Chapada (January and March) ; Corumba 

 (April) ; Santarem. P. varietatis Smith, is apparently synonymous 

 with costatus. 



Pompilus vinicolor n. e\>. PI. IV, f. 6. 



$ . — Thorax, legs and base of first abdominal segment, wine-color ; 

 head, antennae above, apical tarsal joints, and abdomen black ; inner 

 and posterior orbits, dot on each side of scutellum, postscutellum 

 (metanotum), narrow lines on coxae and two spots on first dorsal 

 abdominal segment at base, yellow; dorsulum with a black stripe on 

 each side ; clypeus finely punctured, with large, sparse punctures on 



