PACHYTHONE. 425, 
mala and Mexico it is rarer. We have no specimens from the latter country, though 
the types were procured there. Boisduval’s type of Mesene niciades, kindly lent us by 
Mons. C. Oberthiir, is a much rubbed female of this species. 
Found in sunny openings in the forest (Champion). 
PACHYTHONE. 
Pachythone, Bates, Journ. Linn. Soc. Zool. ix. p. 389 (1868). 
We know of nine species of this genus, which is distributed from Panama to South 
Brazil, five being found in the Amazons valley; two species occur within our limits, 
both in the State of Panama. All the members of this genus are very scarce insects, 
so much so that we have none to spare for dissection; we therefore copy Mr. Bates’s. 
diagnosis of the genus, and leave it in the same position in the family as he placed it. 
“This new genus is formed to include a number of species very similar in size and 
range of coloration to Mesene, but differing in the much more bulky thorax and 
abdomen, and especially in the abbreviated and thickly clubbed antenne. The wing 
neuration is the same as in Mesene and the allied genera; the palpi are very short, not 
passing the lower edge of the frontal pad; and the hind wings are broadly rounded, 
with the outer margin on about the same level as the anal angle. The antenne scarcely 
reach to half the length of the costa of the fore wing; their shafts are brown, spotted 
obscurely with ashy or lighter brown. Eyes naked. The male fore legs are very short ; 
the other legs are moderately elongate and clothed with short scales.” 
1. Pachythone philonis. 
Pachythone philonis, Hew. Ex. Butt., Pachythone and Cremna, ff. 3, 4°. 
Alis fusco-brunneis, anticis fascia aurantia a costee medio fere ad angulum analem transeunte; subtus sicut 
supra, posticis fascia submarginali pallida vix obvia. 
d nobis ignotus. 
Hab. Panama, Chiriqui (Ridde), Bugaba (Champion).—CoLomsia *. 
We have some doubts whether this is really P. philonis of Hewitson, as our specimen 
shows no traces of any spots towards the base of the wing ; the colour of the wings 
below is also much darker. Our materials, however, are too scanty to form a definite 
opinion as to whether there is more than one species. 
Our single specimen was taken by Mr. Champion in the low forest region west of 
Bugaba, whence Herr Ribbe also sent Dr. Staudinger an example; both these are 
females, as are also the type of P. philonis and of an allied species, P. palades, from 
Brazil; the male therefore of this form of Pachythone remains yet to be discovered. 
2. Pachythone gigas. (Tab. XLIV. fig. 25.) 
Pachythone gigas, Godm. & Salv. P. Z. S. 1878, p. 364°. 
Alis nigris, anticis macula elliptica magna in triente apicali, altera acuta ad basin, per margine interno exten- 
BIOL. CENTR.-AMER., Rhopal., Vol. I., January 1836. 31 
