106 Mr. A. G. Butler on the 



Mr. Trail, that he secured no less than 274 species of 

 butterflies alone, in the intervals betAveen his official 

 duties. Of the species collected many are very rare, and 

 several are beautiful new forms ; but the greatest merit of 

 the collection consists in the extreme care with which the 

 precise locality, date of capture, and (where practicable) the 

 habit of each specimen, is registered. With the assistance 

 of such valuable information as Mr. Trail has thus given us, 

 any collector may know positively where and at what time 

 he is likely to obtain examples of the species here recorded ; 

 whilst the cabinet naturalist may form some opinion re- 

 specting their economy, as, for instance, whether or not 

 they produce one, two, or even more broods in a year. 



The Heterocerous Lepidoptera, which are more nume- 

 rous and far more difficult to determine than the butterflies, 

 must be reserved for a future communication. 



My thanks are due to Messrs. Druce and Hewitson for 

 kindly permitting me to consult their cabinets in order to 

 the more satisfactory determination of some of the ob- 

 scurer groups. 



Family NYMPHALIDiE. 



Danain^, Bates. 



Danais, Latreille. 



1. Danais eresimus. 



Papilio eresimus, Cramer, Pap. Exot. ii. pi. 175, 



G, H (1779). 



Low swamp at Prainha, 16th and 17th November, and 



8th December, 1873; Rio Sapo, 21st November, and 



Tunantins, 24th November, 1874. Captured in the marsh 



upon a white composite flower, Marokyopoton. 



Heliconoid Danain^. 

 Methona, Douhleday. 



2. Methona confusa. 



Methona confusa, Butler, Cist. Ent. i. p. 151, n. 1 

 (1873). 

 Alter do Chao, 7th January; forest behind Arimanahy, 

 9th, beach at Samauma, Rio Tapajos, 13th, Obydos, 

 26th March; Conceicao, Rio Mauhes, 7th May; Tunan- 

 tins, 23rd November, 1874; and Serpa, 13th February, 

 Almeyrim, 19th February, 1875. 



