534 MR. H. W. BATES ON THE LEPIDOPTERA 



2. Xapeogenes Tunaxtina. 



2 . Size, shape, and general colour of N. Cyrianassa. Apical yellow spot of the fore 

 Aving oval in shape, rounded on its inner edge, sinuated in the middle, leaving the dusky 

 crossbelt of undiminished thickness to the outer margin. Disk of the hind wing semi- 

 opake, fulvous. Tlie rest as in N. Cyi'iauassa. 



Pound in the forest at Tunantins, north shore of the Upper Amazons. All the 

 individuals seen were conformable to the above description. 



V>. Kapeogenes Adelpiie. 



<;" 9 . Size, shape, and general colour of N. Cijrianassd. The wings are throughout 

 more 02>ake. The apical yellow spot of the lore wing is oblong, of nearly uniform width ; 

 its inner margin has two slight siiuuitions : the l)lack transverse belt between it and the 

 disk commences at the subcostal nervure, and is gradually attenuated to its termination 

 on the outer margin. 



This constant local form diflers I'rom N. CiiriaHnssa more than N. Tinimdina does. 

 It is peculiar to tlie forests of the Cuparl, a ])ranch river of tlie Tapajos. All the 

 individuals found were constant to their type. 



1. Ts^M'KOGENES Inaciiia, Hewitson. 



IlliDiiiiii liiachia, Hewits. Exot. Butt. Jlhomia, fig. fifi (not fi/)*. 



This sj)eeies closely resentblcs N Cyrici/assa in form and colours. The basal part of 

 llic fore wing, however, has a rntlier larger extent of yellowish hyaline; the suljapical 

 spot is regularly oblong oval, and the l)laek crossbelt is gradually narroAved, its edges 

 ])eing straight, from the costa to the outer margin. The antenna> are entirely black, 

 'ilie hind wing l)eneath wants tlie basal costal yellow spot which is so constant in 

 .V. Cyr'nriiassa and its local varieties. 



I'"()und in company with N. C'yi'hn/assa at I'ara. Althougli the two species are so 

 closely allied and lly together, they appear to maintain themselves perfectly distinct. 

 Notliing resemlding a ]iyl)rid example or connecting form ever occurred. I strongly 

 suspect that we have here a case of mimetic adaptation ; because most of the numerous 

 local varieties of A'. Jiiachiti iwv nujdilied to re))resent species of Itliomia occurring in the 

 same localities. 



;"). Napeogexes I'vkois. 



c< ?. Size, shape, and colour of antenna' of A'. Inaclda. The subajjical yellow spot of 

 the lore wing, and its acconii)auying black crossbelt, as well as the broad fulvous boi'dcr 

 of the hind wing, are also precisely the same. The ground-colour of the wings, ]u)wever, 

 is (piite diiferent. The basal area of the fon^ wing and the discal ])ortioii of the bind 

 wiiiL;' (with their iicrvures) ai'c straw-coloured aiul .sfiiiitransparent . The subniarginal 



* Fii;. 07 is given by Mr. llcwitsuii as a variotv (if liuirhia. It ditVcrs ciiily in colour, and is willuuil a doiiht a local 

 \i\T\i-\x u\' Inorltiii. It occurs a))Uiuiaiitl_v at lialiia, wlu^rc it seems to uiiiiiic Ithnmia KurHuM iit that region. It 

 should have a distinctive name lor the sake of clearness ; I iirojiose that of A'. ci'lj)/i(ii-,ii(i. 



