18 BULLETIN BROOKLYN ENTOM. SOC. VOL. VII. June 1884. ] 
the female than the male. ‘The abdomen is more or less tufted in all 
the species, on the anterior segments. The spiracles are as usual, oval 
linear. The genital organs are very prominent and marked in the male, 
There is a special and marked modification of these parts in the various 
species of the genus. The supra-anal clasper is narrowed and extended, 
and on the end is curved downwards, forming a strong corneous hook, 
laterally somewhat winged. In some species, this hook is more curved 
than in others. The lateral plates are subject to great and remarkable 
modifications. Except in 2ézlis, the clasper is independent of the plate 
itself, and consists of a strong corneous spur, rising from near the center of 
the plate, and varying very much in ‘orm. The commonest form is a 
somewhat flattened conical spur, curved inwards, pointed, divided below 
into two parts, (which are here contained in the membrane of the plate), 
extending to and supported by the strong borders of the plate itself. In 
relicta this spur is much shorter, stouter and more heavy; in LZvzone 
it is much longer, and more slender; in /ia and fuatriv it is 
yet longer, more slender and with a different curvature and shape; 
in cerogama it is very curiously flattened and curved; in Afolibuh the 
modification is remarkable; the divided part is freed from the mem- 
brane of the plate, is greatly extended and curved, and the spur itself is 
almost obsolete asa spur. In zudzlis, the spur, as well as the divided 
part, is enclosed in the membrane of the plate, and the clasper is formed 
by the projection of the spur beyond the edge of the plate. 
So far as my observations have gone, the female genitalia correspond 
in form with those of the typical Woctu:d. 
From examination of cabinet specimens, I believe, that the eggs 
are not all fully developed when the imago emerges. The num- 
ber of eggs probably runs up toas many as 400, laid by a single female. 
Prof. French had an amatrix lay 292. 
The fore wings are large, broad, triangular, somewhat arched along 
the costa, more or less pointed and extended at the apex. rounded, and 
very generally undulate on the outer margin, somewhat concave on the 
inner margin, and suddenly narrowing near the base. They are some- 
what more narrow, pointed, and squammose in vestiture, in the male 
than in thefemale. The Azzd wings are large, undulate on the outer 
margin, with rounded apex, and with rounded, almost obsolete anal 
angle, For the markings which are in the main common to all the 
species I refer to figs. 17 and 18 of plate I. 
The vestiture of the wings shows a variation in the shape of the scales 
