436 Mr. W. C. Hewitson on some new species of Butterflies. 



are all bordered with black ; a less distinct silvery line runs along 

 the margin of both wings ; the abdominal fold is gray. Exp. 

 ly^^ inch. 



In my own collection. From Rio de Janeiro. 



On the upper side this species nearly resembles H. Syma, on 

 the under side it is like H. Cytherea. It is also nearly allied to 

 H. Mythra of Godart. 



Heterochroa Ahia. PI. IX. fig. 5. 



Upper side dark brown, with a narrow central common band 

 of white commencing at the median nervure of the anterior wing 

 and extending to near the ferruginous spot at the anal angle of 

 the posterior wing, where it is narrow and pointed, straight on 

 the anterior wing, curved inwards on the posterior. Between the 

 commencement of the white band — which it touches — the costal 

 margin and the apex of the anterior wing, is an irregular some- 

 what triangular large patch of orange. Both wings have the 

 usual submarginal lines of black. 



Under side indistinct ; the white band as above, but pro- 

 longed at the anal angle to the margin of the wing. Inside the 

 band almost white, the cells of both wings crossed by two ferru- 

 ginous belts margined with black ; outside the band claret colour. 

 Exp. 2 inches. 



In my own collection. From Rio de Janeiro. 



This species is easily known from all the others by the pointed 

 anal angle of the posterior wings. 



Heterochroa Thoasa. PI. IX. fig. 6. 

 Heterochroa Thoasa, Hewitson MSS., Diurnal Lepidoptera, p. 278. 



Upper side light brown, with a very broad central band of 

 white, rounded at both ends, commencing at the median nervure 

 of the anterior wings and ending near a small rufous spot at the 

 anal angle of the posterior wings ; between its commencement and 

 the costal nervure of the anterior wing is a spot of white, and 

 between it and the apex of the wing a small lunular patch of 

 orange. The usual submarginal lines border both wings. 



Under side rufous, with the broad band and spot of white as 

 above, a silvery belt of white near the base of both wings, and a 

 short one across the cell of the anterior ; on the anterior wing 

 between the submarginal lines are several obscure spots of lilac, 

 and near the margin of the posterior wing between two of these 

 lines a belt of white ; the abdominal fold is also white. Exp. 

 1/^ inch. 



In the British Museum and my own collection. From the river 

 Amazon. 



