308 RHOPALOCERA. 
We are indebted to M. Charles Oberthiir for the opportunity of examining Boisduval’s 
type of this species, which we find to be identical with the insect we named A. falcata 
in 1878 2. 
On the upperside A. felderi has a general resemblance to A. iphicla; but the 
primaries are more falcate, and there is no fulvous spot at the anal angle of the 
secondaries. On the underside the present species has peculiarities of its own, as will 
be seen on reference to our figure. 
With the exception of a single specimen from Mexico, all our series are from Guate- 
mala, where it is by no means an uncommon insect. Boisduval’s type is marked from 
Costa Rica, but we have ourselves no evidence of its occurrence in that country. 
ad". Three black-margined white spots in a triangle at the end of the cell of the 
primaries beneath. 
25. Adelpha celerio. 
Heterochroa celerio, Bates, Ent. Monthl. Mag. i. p. 127*; Journ. Ent. u. p. 330, t. 13*. f. 4”. 
Papilio iphicla, Cr. Pap. Ex. t. 188. f. E, F (nec Linn.)’. 
Alis fusco-brunneis ad basin et marginibus indistincte lineolatis, anticis plaga subapicali fulva, fascia communi 
lata a vena mediana ad angulum posticarum analem alba viridescente vix tincta; subtus ferrugineis, 
plaga et fascia ut supra; anticarum cellula, stria basali, maculis tribus triangulum formantibus ad finem et 
altera infra eam albis nigro marginatis; posticis fascia transversa ad basin nigro limbata, alis ambabus 
margine externo maculis lunulatis serie duplici positis albidis ornatis. 
Hab. Mexico, Oaxaca (Fenochio), Cordova (Riimelt) ; Guatemata!, Polochic valley, 
Chuacus, Choctum (Hague), Panima, Chiacam (Champion), San Gerénimo, central 
valleys, Pacific slopes (F. D. G. & O. 8.); Nicaragua, Chontales (Belt, Janson); Costa 
Rica (Van Patten), Irazu (Rogers); Panama, David, Volcan de Chiriqui, Bugaba 
(Champion), Lion Hill (M‘Leannan)—Cotompi1a; Amazons vaLuEy!; N. Brazit. 
This is one of the commonest species of Adelpha in Central America, being found 
throughout the region from Southern Mexico to Panama; thence it passes into South 
America, and is, according to Mr. Bates, found sparingly throughout the Amazon 
region”. It inhabits the low country up to an elevation of 3000 feet. 
26. Adelpha serpa. 
Heterochroa serpa, Boisd. Sp. Gén. i. t. 8. f. 4°. 
A, celertoni similis, sed fascia communi angustiore et viridescenti haud tincta; subtus alis omnino flavicanti- 
oribus, lunulis posticarum submarginalibus latioribus serie duplici lineola angustissima divisa. 
Hab. GUATEMALA.—Brazit }, 
The authority for including this Brazilian species in our fauna rests upon a single 
specimen formerly in Mr. Bates’s collection, labelled as coming from Guatemala. 
This example is a female, and differs in no way from many others in our collection: 
