OF WASHINGTON. 57 



B. discretum Montandon (20). 



Sao Paulo d'Olivenga, Amazon (as) and Manaos, Brazil; 

 Province of Corrientes (Argentine Republic) ; Rio Apa 

 (Paraguay) (20). 

 B. elegans Mayr (Zaitha) (2). 

 Rio Apa (Paraguay) (2). 

 B. ellipticum Latreille (Zaitha) (19). 



Zaitha elliptica Mayr, Montandon, Champion (14) (19). 



Mexico (19). 

 B. eumorpha Dufour (Zaitha) (2) (14) (= dentatum Mayr) 



(2) (I 4 ) (I 9 ). 



Luque (Paraguay) (2). 

 B. fluminea Say (19). 

 B. foveolata Mayr (Zaitha) (2). 



Rio Apa (Paraguay) (2). 

 B. gestroi Montandon (17). 



Argentine Republic; Paraguay (17). 

 B. margineguttata Dufour (Zaitha) (14) ( testaceopallidum 



Latreille) (14) (19). 

 B. martini Montandon (Zaitha) (14) (20). 



Patagonia (14). 

 B. mayri Berg (19). 



Venezuela ; Guiana ; Brazil ; Rio Beni, Bolivia ; Argentine 



Republic (19). 

 B. micantula Stal (Zaitha) (2). 



Rio Apa and Asuncion (Paraguay) (2). 

 B. noualhieri Montandon (20). 



Rio Grande do Sul (Brazil) (20). 

 B. oxyura Dufour (20). 

 B. plebeja Stal (Zaitha) (2) (20). 



Buenos Aires (Argentine Republic) (2) (20). 

 B. subspinosa Dufour (Zaitha) (19) ( boscii Lepeletier and 



Serville) (19). 



B. testaceopallidum Latreille (loA) (15) (19) (20). 

 Zaitha carbonaria Dufour (19). 

 Z. margineguttata Dufour (14) (19). 

 Z. margincpunctatum Dufour (Montandon) (20). 

 Z. stolli Mayr (19). 



Family NEPID^. 

 Genus NEPA Fabricius (i) (n) (19). 

 N. apiculata Harris, Uhler (u) (19). 

 cincrea Ferrari (in part) (n) (19). 



New York; Illinois (19) ; Mexico (n) (19). 



