520 MR, H. W. BATES ON THE LEPIDOPTERA 



eacli other so much, that I could not distinguish them when on the wing. It is replaced 

 in South-East Brazil by the Th. Fytho of Eelder, which I consider a local form of the same 

 species. 



Genus Dircenna, Doubleday. 

 Doubld. and Hewits. Gen. Diurn. Lep. p. 119. 



In this genus the hind-wing neuration resembles that of Methona, inasmuch as the 

 lower disco-cellular is strongly angulated, and emits a recurrent nervule ; but the middle 

 disco-cellular in the S is bent, and directed towards the apex of the wing. The internal 

 nervure is very short, terminating on the abdominal edge. In the fore wing the first 

 median branch is thrown off at a moderate distance from the base of the wing, terminating 

 on the hind margin, close to the posterior angle, the cell being much broader than in 

 liethona and ThyricUa. The body is slender ; the antennae moderately elongated, and 

 thickened towards the tip into an elongate club. The palpi are clothed in front with 

 long porrect hairs, their third joint being long and pointed. The male fore tibiae and 

 tarsi are aborted, being reduced to a small knob at the apex of the femur. 



Doubleday left the list of species referable to this genus in an unsatisfactory state. 

 The following are all at present known * ; — 



1. D. Klugii, Hubn. Zutr. f. 801, 802.— Mexico. 



2. D. Jemima, Hllbn. ib. f. 807, 808. — Venezuela and New Granada. 



D. lambe, Doubled, and Hewits. Gen. Diurn. Lep. pi. xvii. f. 2. 



3. D. Dero, Hiibn. Zutr. f. 243, 244.— South-East Brazil, Bahia. 



4. 2). Bho'eo, Felder, Lepidop. Eragment., p. 40. — South-East Brazil, Para, and 

 Amazons. 



5. D. Xantho, ib. p. 40. — South-East Brazil, Bahia. 



6. D. Zelia, Guer. Icon. Regno Animal, text, p. 470. — Bolivia. 



7. D. Bpidero (Boisduval, MS.), m sp. — Amazons. 



8. D. Lenea, Cram.t t. 231, f. D. c?. 



D. Melanida, Cram. t. 231, f. F. ? . 

 D. Zalo, Boisduval, MS. 



1. DiBCENNA KHOEO, Eeldcr. 



D. rho'eo, Felder, Lepidop. Fragment., p. 40. 



This form diflPers from the B. Bero of Hiibner only in the greater breadth and irre- 

 gularity of the dusky -black border of the hind wing, especially in the ? , and in the 



* Bircenna Duillia, Hewits. Trans. Ent. Soc. vol. ii. N.S., pi. xxiii. f. 3, is a Hymenitis. 



f This species is imperfectly known. Cramer's figures are very unsatisfactory. In Cayenne examples, the wings 

 are clearer hyaline than represented by him ; the basal half of the fore wing, the anal quadrate patch of the hind 

 wing, and the nervures are suffused with bright fulvous. The nervures near the apex of the fore wing are bright 

 yellow. It appears to be a rare species. In Dr. Boisduval's collection, typical examples stand under the MS. name 

 of D. Z<bIo. I am indebted to Dr. Boisduval for the present of a fine example. I believe, however, that D. Lenea 

 (Guiana), D. Epidero (Amazons), D. Zelia (Bolivia), and D. Xantho (Bahia) might be all treated as geographical 

 forms of one and the same species. 



