520 MR. H. W. BATES ON THE LEPIDOPTERA 



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

 in South-East Brazil hy the Th. Pijtho of Felder, which I consider a local form of the same 

 species. 



Genus Dircenna, Doublcday. 

 Double!, and Hewits. Gen. Diurn. Lep. p. 119. 



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

 lower disco-cellular is strongly angulated, and emits a recurrent nervule ; hut 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 l)ranch is thrown oflF 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 

 JleUioiKi and Tlini-idia. The body is slender; the antennas moderately elongated, and 

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

 long porrcct hairs, their third joint being long and pointed. The male fore tibi;i} 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. n. Klugli, Hiibn. Zutr. f. 801, 802.— Mexico. 



2. D. Jeiiiiiiia, Iliilm. ib. f. 807, 808. — Venezuela and New Granada. 



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



3. D. Dero, Hilbn. Zutr. f. 213, 211.— South-East Brazil, Bahia. 



1. D. lilujeo, Eelder, Lepidop. Fragment., p. 40. — South-East Brazil, Para, and 

 Amazons. 



5. D. Xtintho, ib. p. 10.— South-East Brazil, Bahia. 



(■). D. Zclid, Guer. Icon. Begne Animal, text, p. 470. — Bolivia. 



7. 1). Epidero (Boisduval, MS.), n, sp. — Amazons. 



8. D. Lenea, Cram.f t. 231, f. D. cf . 



I). Mvlnnidu, Cram. t. 231, f. F. 2. 

 D. Zielo, Boisduval, MS. 



1. DiRCEXNA uiiOEO, Eeldcr. 



D. rho'eo, Felder, Lepidop. Fra;;ment., p. 40. 



This form differs from the D. l\'i'o of IIiil)ner only in the greater Ijreadtb and irre- 

 gularity of tlic dusky-black border of the hind wing, especially in the 9, and in the 



' Diiceniiu DiiiUid, IK'wits. Trans. Ent. Soc. vol. ii. N.S., ]il. xxiii. f. 3, is a llijmenids. 



t Tliis spfcit's is inipertVctly kiiDWii. Cramer's figiiics are very un.satisfactory. In Cayenne examples, tlie wings 

 are clcaicr hyaline than represented by him ; the hasal halt' of the i'ore wing, the anal (piadrate patch of the hind 

 win£j, and the nervnres are suffnsed with l)riglit fulvous. The nervures near the apex of tlie fore wing are hright 

 yelliiw. It appears to he a rare species. In Dr. lioisduval's collection, typical examples stand under the MS. name 

 nf /;. Zti-h). I am indi'htcd to Dr. Ijoisdnva! for the [jresent of a fine examjile. 1 believe, however, that D.Lenea 

 ((iniana), I). Epideru (Amazons), I). Zi'/ni (liolivia), and I). Xanlho (IJahia) might l)e all treated as geographical 

 forms of one and the same S|)eeies. 



