450 PROCEEDINGS OF THE ACADEMY OP [1898. 



Polybia rufidens Sauss. 



Two specimens. Corumba (April) ; Chapada (May). 

 Polybia atra Oliv. 



Chapada, January, March-June, August, December; Santarem. 

 About 250 examples. 



Polybia dimidiata Oliv. 



Chapada, January, April, October to December. Thirty-four 

 specimens. 



Polybia socialis Sauss. 



A single specimen from Rio de Janeiro, November. 

 Polybia sylveirse Sauss. 



Three specimens, Rio de Janeiro, November. P. enxius Smith 

 seems to be identical with sylveirce. 



Polybia pallipes Oliv. 



The series before me shows that in coloration this species merges 

 from the form figured by Saussure on PI. XXV (fig. 2) of his work, 

 abdomen brownish or blackish, into the species known as fulvo- 

 fasciata DeGeer. The latter has the wings quite yellow, however, 

 whereas in pallipes they are subhyaline. 



About 45 specimens. Chapada, January, March, April, Sept- 

 ember, October, December; Corumba, April, May ; Pedra Branca, 

 April ; Rio de Janeiro, November ; Santarem, February. 



Polybia vespiceps Sauss. 



Sebastia?, October ; Chapada. About 60 specimens. 

 Polybia liliacea Sauss. 



A large series of this species from Chapada, March, April, Sept- 

 ember, October, December; Mararu, April ; Santarem. 

 Polybia angulata Fabr. 



Eleven specimens from Santarem. 



Polybia carbonaria Sauss. 



There is a single male in the collection from Rio de Janeiro, Nov- 

 ember, which I doubtfully refer to this species. Saussure described 

 the female only. 



Polybia angulicallis Spin. 



Two specimens. Santarem. 

 Polybia lugubris Sauss. 



Rio de Janeiro, November. One specimen. 



