230 Annals of the Carnegie Museum. 



BB. I. Posttriangular field of the hind wing with no single cell reach- 

 ing from M 4 to Cuj Most didyma hypodidyma, spiniftra. 



BB. 2. Posttriangular field of the hind wing with at least one cell 



reaching from M 4 to Cu r .... ocellata. 



A. 2. Internal triangle of the front wing 2-celled ; discoidal triangle of the 

 front wing free. 

 Posttriangular field of the hind wing with no single cell reaching from M 4 



to Ciij didyma laevigata. 



Posttriangular field of the hind wing with at least one cell reaching from 



M 4 to Cu x • ocellata dentiens. 



A. 3. Internal and discoidal triangles of the front wing free, posttriangular field 



of the hind wing with at least one wing reaching from M 4 to Cu t catenata. 



A A. Number of cells between the hind angle of the triangle and vein A 2 immediately 

 opposite that angle on the hind wing one ; at least one cell reaching from M 4 

 to Cu x on the same wing. 

 Discoidal triangle of the front wing 2-celled, internal triangle 3-celled. 



athenais, 

 Discoidal triangle of the front wing free. 



E. Internal triangle of the front wing 3-celled. 



\_schitmanni of Mexico & Central America]. 



EE. Internal triangle of the front wing 2-celled longifasciata. 



EE. Internal triangle of the front wing free. 



The two posttriangular rows of the front wing increase to three at the 



level of the first postnodal macrocercis. 



The two posttriangular rows of the front wing increase to three distal to 

 the level of the first postnodal tibialis, eximia. 



151. Micrathyria didyma hypodidyma Calvert. 



Micrathyria didyma hypodidyma Calvert, Biol. Centr. -Amer. Neurop. p. 224, foot- 

 note. 1906. 

 Micrathyria protce Forster, Entomologisches Wochenblatt, xxiv, p. 153, 167. 1907. 



The following additional material is at hand. 



Habitat: — Brazil, Rio Grande do Sul, 2 d\ 1 9. Rio de 

 Janeiro, January, 2 d and part of 1 d\ November part of 1 d, un- 

 dated 2 d and part of 1 d, t ? ; H. H. Smith. Muniz Freire, 

 Espiritu Santo, June 19, 1908, 1 <d ; J- D. Haseman. 



Paraguay, Rio Parana, below Rosario, December 18, 1 ? ; H. H. 

 Smith. All in the Carnegie Museum, Pittsburgh. 



These specimens show considerable variation in the venation. 

 There is only one cell between the hind angle of the triangle and 

 A 2 immediately opposite that angle in both hind wings of 1 <d R- G. 

 do Sul, and in one hind wing of 1 d of R. d. Janeiro. The internal 

 triangle of the front wings is two-celled in one wing each of 1 c? R. 



