AGANISTHOS.—COEA. 325 
macula in costa apicem versus alba, posticis albido marginatis; subtus brunneis linea communi a 
macula costali anticarum ad angulum analem nigra, fasciis duabus fuscis nigro marginatis ad basin, linea 
altera arcuata a costa media ad angulum posticarum analem nigra; fascia quoque brunnea arcuata ab 
angulo posticarum apicali ad angulum analem, extra eam et margine externo albido atomatis. 
Hab. Fuoripa®?—Mexico, Cordova (iimeli); Guatemaa, San Isidro (Champion) ; 
Moraeua Vary, Pacific slopes (fF. D. G. & O. S.); Costa Rica (Van Patten’), 
Cache (Rogers); Panama, Volcan de Chiriqui (Champion), Bugaba (Arcé), Lion Hill 
(M‘Leannan).—Cotomsia to South Brazit; Harrt. 
A common and very widely distributed species, varying but little throughout its 
range. It has a rapid and powerful flight. Mr. Bates says it frequents open sunny 
places in the neighbourhood of towns’. Haitian specimens have the tawny marking 
of the primaries broader. 
Fabricius described this species twice over in his ‘Systema Entomologie.’ The 
second name® has been more generally used than the first 1, and we continue the practice. 
Mr. Butler and others resort to that first given; but both having appeared in the same 
work, we do not see why question of priority need have been raised. 
COEA. 
Coea, Hiibner, Verz. bek. Schm. p. 48 (1816, partim). 
Aganisthos et Megistanis, auctt. partim. 
The common South-American butterfly Papilio cadmus of Cramer has been usually 
placed either in the genus Aganisthos or in Megistanis. Prof. Westwood associated it 
with the latter genus; but Mr. Bates considered that all its essential points of structure 
agreed with those of the former. A close examination shows us that in reality it does 
not agree satisfactorily with either, as will be seen from the following comparison :— 
The cell in both wings is closed by an atrophied lower discocellular nervure as in Megi- 
stanis, that of Aganisthos being open. In the outline of the primaries and in general 
coloration it agrees with Aganisthos, but the secondaries have a caudal appendage and 
a dentate outer margin as in Megistanis; in the pattern of the underside of the wings 
it differs widely from both these genera, and in this respect recalls to mind several 
species of the Old-World genus Charaxes. In the structure of the male armature it 
has peculiarities apart from the species with which it has been associated, as will be 
seen below. 
Hiibner’s name Coea seems here applicable as a generic term for this species, having 
been used for Papilio cadmus, and to another butterfly now placed in Philognoma. 
In Coea cadmus the subcostal of the primaries emits two branches before the end of 
the cell, the third branch lies close to the subcostal for some distance, and then diverges 
to the margin; both the upper and middle discocellulars are very short, and an atrophied 
