252 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



spiniform hairs. The dextral style bears mesad on its external face 

 a stout chitinous spine, directed proximo-dextrad and curved proxi- 

 mad. The intervening triangular production between the bases 

 of the styles has a minute but stout spine at its apex, another much 

 smaller spine on the dextral margin, the sinistral margin being 

 broadly subchitinous. 



The general structure and very faintly tessellate tegmina indicate 

 the close affinity of this species to those of the genus recorded below. 



Chorisoneiira gracilis (Saussitre) 



1862. Bl[aUa} gracilis Saussure, Rev. et Mag. de Zool., (2), XIV, p. 167. 

 [[9], Brazil.] 



Tijuca, Rio de Janeiro, Brazil, 3 cf , 1 9 • 



The males have the styles longer than in C. perlucida (Walk- 

 er), the dextro-proximal specialization of the sinistral style and 

 intervening triangular production between the bases of the styles 

 in every way similar, the dextral style with a much smaller, minute, 

 spine mesad on its dorsal margin, directed proximad. 



Saussure 's original description would appear to have been taken 

 from a smaller individual, the material before us agreeing better 

 with Brunner 's characterization of his Brazilian flavoantennata and 

 with Saussure and Zehntner's discussion of material from Rio 

 Grande do Sul, Brazil, at the time those authors placed flavoanten- 

 nata in the present synonymy. 



The tegminal tessellation in these specimens agrees closely with 

 that of C. perlucida (Walker). It is, however, a trifle more distinct, 

 while in two individuals the veins proximad are weakly whitish. 



Chorisoneura nigrifrons (.Serville) 



1839. Blalla nigrifrons Serville, Hist. Nat. Ins., Orth., p. 109. [cf, 9 ; 

 Brazil.] 



Tijuca, Rio de Janeiro, Brazil, 1 d^ , [Hebard Cln.]. 



Closely agreeing with the two previous species in size, form and 

 general coloration, the striking cephalic marking would appear 

 to be a feature by which this species may be readily recognized. 

 The genitalia of the present specimen are in a poor state of preser- 

 vation. 



PERISPHAERINAE. 



Brachycoli tuberculata (Dalman) 



1823. Blaita tuberculata Dalman, Analecta Ent., p. 87. [Brazil.] 

 Tijuca, Rio de Janeiro, Brazil, 3 9,2 small juv. 

 The very early stage, represented by the immature individuals 



