376 PROCEEDINGS OF THE ACADEMY OF [1897. 



long as the first three hind tarsal joints; last ventral segment con- 

 vex. Length 17-18 mm. 



$ . — Colored like the 9 ; but in one example the thorax except 

 dorsulum, is more or less wine colored ; clypeus more convex, its 

 apex broadly incurved, silvery pubescence denser; first joint of fla- 

 gellum nearly as long as two following united ; scutellum impressed 

 medially. Length 18 mm. 



Uacarizal (February) ; Chapada (March). Three 9 , one $ 

 specimens. S. laevipes is probably the form mentioned by Kohl a& 

 a dark variety of S. costipennis, his specimen, a $ , having come 

 from Rio Grande do Sul. It differs from costipennis not only in 

 color, but by the smoother legs, longer petiole of 9 , etc. 



Sphex (Isodontia) azteca Sauss. 



One specimen, a S . Chapada (March). 

 Sphex caliginosus Er. 



Fifteen 9 , 22 $ specimens. Chapada (March, April) ; Santa- 

 rem. 



Sphex fuliginosus Klug (=conyener Kohl). 



A large series of females. Chapada (March, April). 

 Sphex Servillei Lep. (=latior Er. —roraHis Kohl). 



I have no doubt that latior is identical with Servillei. The large 

 series present, indicates a common occurrence. Chapada (January^ 

 March, April) ; Santarem. Ninety-one specimens, of which only 

 five are females. 



Sphex funestus Kohl. 



Chapada (March, April) ; Corumba (May) ; Santarem. Four 

 specimens. 



Sphex neotropicus Kohl. 



Chapada (March, April) ; Santarem. Three female, two male 

 specimens, one of the latter with reddish fore legs. 



Sphex ingens Sni. 



A single male of this huge species, without particular locality or 

 date of capture. 



Sphex melanopus Dhlb. {—ruficavda Tasoh.). 



Three specimens. Uacarizal (February) ; Corumba (May). 

 Sphex hrasilianus Sauss. 



A single specimen of the var. tinctipennis Cam. Chapada 

 (April). 



