112 



the colouration is very different. Fore wing black ; the basal portion having a large 

 triangular spot (occupying about three-fourths the surface of the wing) of a rich car- 

 mine colour, glossed with cobalt-blue, in certain lights. This is followed by a belt of 

 the most beautiful blue colour, leaving only the apex and a narrow outer margin 

 black, the former of which has a short belt of three large indistinct pale spots. 

 Hind wing has the base and the margins narrowly black ; the disk entirely of the 

 same rich blue as the belt across the fore wing. 



" I took two of this very richly coloured species, one at Ega and one at St. 

 Paulo : one of them is in the collection of Mr. W. C. Hewitson and one in my 

 own. I saw only four individuals during four years' residence and travel on the 

 Upper Amazons. 



" SiDERONE Mars. 



" $ . Considerably less in size than S. Ide. The fore wing has the apex more 

 more falcate than in that species ; the outer margin much more strongly rounded, 

 leaving the hinder angle indistinct; the hind wing also is shorter. 



" Above. Deep black, ^ith two clear white spots near the apex. A large 

 oblique belt of carmine crosses the wing from the costal edge to near the hind 

 .angle ; its costal part dilated towards the extreme base of the wing. Hind wing 

 black. Two conspicuous rounded red spots near the middle of the costal edge. 

 Anal lobe gray. 



^^ Beneath. The base and apex of both wings are of a rich rufous-brown. The 

 discal portion is glossy brownish gray, irrorated nearly throughout with rufous-brown. 

 The hind wing has a broad belt across the middle, of a shining ash-colour, spotless. 

 The apex of the fore wing has a belt of white and lilac-coloured spots. 



" I only saw one individual of this species, at St. Paulo, near the frontier of Peru. 

 Like all the other species of Siderone and Paphia, it has the rapid flight of the typical 

 Nymphales, and, like them, not easily scared when reposing, pertinaciously returning 

 to the same spot after being driven away. Its near relative, Siderone Ide, so common 

 in the West Indian Islands and Guiana, also occurs in the country, but is very 

 rare." 



The Secretary read the first part of a paper by Mr. H. W. Bates, intituled " Con- 

 tributions to an Insect Fauna of the Amazon Valley." 



