TEEIAS. 167 



Costa Rica (Van Patten* 67 ), Irazu, Cache (Bogers); Panama, David (Champion), 

 Chiriqui, Calobre, Veraguas (Arce), Paraiso (Hughes), Lion Hill (M'Leannan). — South 

 Ameeica generally to South Brazil. 



Considerable variation is found in a series of specimens as to the width of the black 

 margin of the secondaries, which is wholly absent in our Mexican examples ; it becomes 

 just apparent in some females in Guatemala ; in Nicaragua it is well denned, and thence 

 southward throughout the whole northern portion of South America, but it becomes 

 again evanescent in South Brazil. As regards the underside the northern specimens are, 

 as a rule, much more suffused with yellow, and have indefinite spots on the secondaries. 

 These characters gradually disappear, until we find in most southern examples the 

 under surface nearly immaculate white, with a yellowish tinge at the base of the 

 wings. Lastly, as regards size, with a vast majority of specimens of average dimensions 

 we find, very generally dispersed, examples of very small size which we are not other- 

 wise able to distinguish from those with which they are associated. 



Of the names which have been given to this variable form, T. lucilla and T. celata 

 apply to the insect of South-eastern Mexico, T. marginella to that of Venezuela, found 

 also, according to Butler and Druce, in Costa Rica. The original T. albula of Cramer 

 came from Guiana, and the figure shows no dark margin to the secondaries ; but with 

 Guiana specimens like the figure we also find others with the black margins, these we 

 believe to be females. T. albula appears to be a common species wherever it is found 

 from the sea-level to an altitude of 3000 or 4000 feet ; it is common in Eastern Mexico, 

 probably as far north as Tampico, but it is apparently absent from the western side of 

 that country. In Guatemala it occurs on both sides of the Cordillera. 



Note. — Terias gnathene, Boisd. (Sp. Gen. p. 680 ; Geyer in Hubn. Zutr. v. ff. 937, 938), 

 is stated to have come from Yucatan by Boisduval, and from Honduras by Mr. Butler 

 (P. Z. S. 1871, p. 530), who also gives T. messalina (Fabr.) from the latter source, 

 specimens of both having been purchased for the British Museum from a dealer in 

 1839. 



We are convinced that the former is the male of the latter, and that the species is 

 an Antillean one, found in Cuba and Jamaica, and also in the island of New Providence, 

 whence Mr. Taylor has recently sent us a series of specimens. Its presence on the 

 continent of Central America requires confirmation. 



16. Terias mana. (Tab. LXIV. figg. 13, 14 <s .) 



Terias mana, Boisd. Sp. Gen. p. 681 1 ; Bates, Journ. Ent. i. p. 243 2 . 



Alis albis, antieis costa a basi grisea, apice et margine externo fuscis, illo introrsum angulum analem versus 

 excavato ; posticis nonnunquam margine externo griseo tincto : subtus antieis area interna alba, costa et 

 apice cum posticis flavescentibus, illis maculis indistinctis fuscis notatis. 



Hab. Nicaragua, Chontales (Janson); Panama, Lion Hill (M'Leannan). — Guiana; 

 Amazons valley 2 ; North Brazil. 



