CALYDNA. 433 
Hab. Panama, Chiriqui (Mus. Staudinger’). 
We are indebted to Dr. Staudinger for the loan of the single specimen of this insect 
which we described and now figure. It is an isolated species, having no near allies 
that we are acquainted with. 
CALYDNA. 
Calydna, Westwood, Gen. Diurn. Lep. p. 436 (1851). 
Calydna comprises about thirty species, ranging from Mexico to South-east Brazil; 
three only come within our limits, and all occur in Mexico. 
The subcostal branch of the primaries in C. hegias emits two branches before the end 
of the cell and one after it; both the lower and middle discocellulars are atrophied, the 
latter meets the upper radial a little beyond its junction with the subcostal, so that there 
is a very short upper discocellular, the former meets the median some way beyond the 
second branch; the costal and median sides of the cell are very nearly equal. The 
secondaries have a basal nervure; the discocellulars are atrophied, the upper meets the 
subcostal beyond the first branch, the lower the median beyond the second branch ; 
the costal side of the cell is about equal to the median side. 
The front legs of the male are slender, they have the trochanter inserted beyond the 
middle of the coxa, femur > 4 coxa, tibia < coxa, tarsus=femur; the terminal tarsal 
joint of the front leg of the female=second joint, and has a setose pad beneath, the 
first, second, third, and fourth joints each terminate beneath with a pair of strong 
spines. The palpi have a slender terminal joint— % middle joint; the antenne have 
thirty-two joints, the terminal twelve forming a well-defined club. 
The harpagones in the secondary sexual organs of the male are subtriangular; the 
outer edge curves outwards about the middle, and recedes again before the apex, which, 
as well as the outer margin, is setose. The penis is a simple rod, with the usual 
curved strap running from its middle to the base of the harpagones. The bursa copu- 
latrix of the female has two well-defined chitinous spines with granular surfaces. 
1. Calydna venusta, sp.n. (Tab. XLVII. figg. 1, 2.) 
Alis obscure fuscis, maculis nigris brunneo marginatis notatis, lmeola submarginali lunulata albida, extra eam 
maculis nigris in serie positis, anticis macula subtriangulari ad cellule finem, duabus minoribus extra eam, 
altera juxta costam, semihyalinis ; subtus pallidioribus maculis omnibus multo magis distinctis, cilia alterne 
fusca et alba. 
 alis brunnescentioribus, aliter mari sat similis. 
Hab. Muxtco, Acapulco (J. J. Walker); Nicaragua, Chontales (Belt). 
We have two specimens of this species, one a male in beautiful condition, which was 
captured by Mr. Walker near Acapulco and kindly presented to us; the other, from 
Nicaragua, is apparently a female, but much worn. 
We do not know that it has any near ally. 
BIOL. CENTR.-AMER., Rhopal., Vol. I., January 1886. 3K 
