218 On Five neio Species 0/ Castnia. 



5. Castnia dodona, sp. n. 



Primaries long and narrow, hyaline, the veins all black ; 

 the apical band oval and very wide ; a black band crossing 

 the middle of the cell. Secondaries with the middle hyaline 

 space very small, and a wide black band crossing the wing 

 from the costal margin to the anal angle ; the outer margin 

 black, with some small white spots at the anal angle. Head, 

 thorax, and abdomen black ; antennae black, the tips yellow ; 

 the sides of the abdomen pale yellow. 



Expanse 4| inches. 



Hob. Ecuador, Sarayacu {Buckley, Mus. Druce). 



This species is allied to Castnia linus, Cram., and was 

 included with it by Westwood, who also sank Castnia helico- 

 nioides, Herr.-Sch. I now have four species of this group, 

 which are easily separated from each other and are geographi- 

 cally quite distinct ; they are as follows: — 



Castnia linus, Cram. 

 Hah. Guiana, Surinam, Cayenne. 



Castnia dodona, sp. n. 

 Hah. Amazons, Ecuador. 



Castnia heliconioides, Herr.-Schaff. 

 Hah. North-west and South-east Brazil. 



Castnia micha, sp. n. 

 Hah. Paraguay. 



The resemblance between these species of Castnia and the 

 following species of Perecopidee from the same localities is 

 very remarkable : — 



Anthomyza brotes, Druce, resembles Castnia linus, Cr. 



Anihomyza Buckleyi, Druce, resembles Castnia dodona, 

 Druce. 



Anthomyza Swainsoni, Druce, resembles Castnia helico- 

 nioides, Herr.-Schaff. 



From Paraguay I have not yet received any species of 

 Anthomyza. 



