belonging to the Genus Castnia. 14*1 
The palpi in some are long, in others reaching half way to- 
wards the base of the antennae ; the first joint is always short and 
thick ; the second always the longest, and of equal thickness 
throughout ; the third is always very short, with the apex mucro- 
nate. These joints are more or less covered with scales. 
The head is broad, sometimes broader in the male than in the 
female, with large and prominent eyes : it is also furnished with 
three distinct ocelli. 
The body is large, somewhat pointed, thickly covered with pro- 
minent scales, and generally ending with a brush of longer ones. 
The wings vary in form and also in the disposition of the ner- 
vures ; the discoidal cell of the lower wing appears to be open, 
except that a very slender nervure proceeds a short distance from 
the base, and diverges to each side, forming two small cells, whilst 
in Castnia Nicon the discoidal cell is open, but a slender nervure 
proceeds from the base, and is attached only to one side, and thus 
forming a cell. These insects, like all others which deflex 
their wings when in a state of repose, are furnished with wing- 
guide or guides, for they vary in number as to species. They 
proceed from the main nerve of the lower wing, and are received 
into a socket placed on the upper nerve of the discoidal cell of 
the anterior pair. The socket is covered with scales, so as to be 
scarcely visible. 
The species of this genus may be divided into the following 
sections : — 
I. Those with the palpi very long, closely applied to the head, 
and covered with short scales. The fore-wings are subtriangular, 
thickly clothed with scales, with the exterior margin straight, or 
slightly rounded ; the lower wing beneath with one guide. — C. 
Cyparissias, Licus, Evalthe, Fonscolombei, pi. xiii, fig. 1, &c. 
II. Those with the fore-wings elongate-triangular; the hind- 
wings are expanded, with the posterior margin somewhat trun- 
cate. — C. Ardalus, Palatinus. 
III. Those with the palpi short, reaching halfway towards the 
base of the antennae, and covered with long scales ; the fore-wings 
covered with small scales, with the exterior margin rounded. 
The outer margin of all prominently fringed with long scales. — 
C. Hubneri, pi. xiii. fig. 2. 
IV. Those with the wings covered with minute scales, partly 
diaphanous ; the fore- pair with the exterior margin rounded, 
similar also in the hind-pair, with three wing-guides. — C. Cochrus, 
Linus , and Acrceoides. 
V. Those with the antennae similar to the others, but the 
