470 ~ RHOPALOCERA. 
NYMPHIDIUM. 
Nymphidium, Mlliger, Mag. vi. p. 286 (1807) ; Westwood, Gen. Diurn. Lep. p. 447 (1851). 
This genus comprises about seventy species, ranging throughout Tropical America 
from Mexico to South Brazil; of these, nineteen are found in Central America, the 
numbers gradually increasing as we approach the southern continent, three species 
being found in Mexico, seven in Guatemala, and no less than thirteen in the State of 
Panama. Six out of the nineteen species extend their range into the southern continent, 
leaving thirteen peculiar to our country. 
The subcostal nervure in the primaries of WV. molpe emits two branches before the 
end of the cell and one after it; there is a very short upper discocellular, the atrophied 
middle discocellular meeting the radial close to its junction with the subcostal; the 
lower discocellular is also atrophied, and meets the median a little beyond the second 
branch ; the costal side of the cell is a little longer than the median side. The secon- 
daries have a basal nervure; both discocellulars are atrophied, the upper one meets 
the subcostal a little beyond the first branch, the lower the median a little beyond the 
second branch; the costal side of the cell is shorter than the median side. 
The front legs of the male of WV. lycorias have the trochanter inserted beyond the 
middle of the coxa, femur=4 coxa, tibia=coxa, tarsus=tibia. The terminal joint of 
the tarsus of the female (NV. molpe) is the same length as the second joint, and all 
except the last terminate in a spine. The palpi have the terminal joint longer in the 
female than in the male, >4 middle joint; the antenne have forty-five joints, and 
terminate in a very slender club. 
The harpagones in the secondary sexual organs of the male consist of two long 
slightly depressed spines, the lower slightly setose, except at the distal end, the upper 
setose near its distal end; there is a large patch on either side near the base of the 
harpagones of long sete. The penis is decurved and stout, and the usual strap runs from 
its base to the base of the harpagones. The bursa copulatrix of the female has a pair 
of thin projections strongly serrate along one edge, and granular towards their base. 
In WN. lycorias the harpagones of the male differ widely from those of W. molpe, being 
lobes with a vertical outer edge, slightly dentate, and terminating at the upper 
angle with a flattened elongate projection bearing at its end several well-defined 
papille. 
a. Sexes dissimilar. 
1. Nymphidium mycone. 
Nyphidium mycone, Hew. Ex. Butt., Nymphidium, t. 3. ff. 16, 17, 18'; Bates, Journ. Linn. Soc. 
Zool. ix. p. 451 *. 
Alis brunneis maculis ad basin et lituris duabus submarginalibus saturatioribus, inter has fascia fusca albido 
