350 
Journal of Agricultural Research 
Vol. IX, No. 10 
The genus differs further from Gelechia in the possession of an antennal pecten in the 
moth, and in the arrangement of the setae of the larval head; Aa is anterior to A 2 , not 
posterior to it as in Gelechia; P! and P 2 are posterior respectively to Adf L and Adf 2 , 
which in Gelechia are nearly opposite to these, and L t is posterior to P 1? not on the 
level with it as in Gelechia. 
The most striking larval difference is in the crotches of the abdominal prolegs, which 
are uniordinal and arranged in an incomplete circle, broken outwardly (PI. io, K). 
In Gelechia they are biordinal and in a complete circle. 
Pupa. —The pupa of Peciinophora gossypiella is pubescent, without any long setae 
except on last joint, and thus is easily distinguished from the smooth, seta-bearing 
pupa of Gelechia; cremaster present. 
SPECIFIC DESCRIPTION 
Moth (PI. 7, A.)—Labial palpi reddish brown; second joint with two diffused black 
bars exteriorly; terminal joint with two well-defined, broad, black annulations, one 
at base, the other at apical fourth. Antennas brown with narrow black annulations; 
basal joint with long black pecten. Face and head light reddish brown with some 
pale iridescent scales. Thorax reddish brown with a sprinkling of black around the 
collar; patagia somewhat lighter brown, unmottled. Fore wings darker brown with a 
series of small, ill-defined, black sf>ots along the costal edge from base to apical fourth, 
where there is a larger dash of light ocherous brown; dorsal edge and apical part of 
wing suffused with darker, blackish brown; the middle of the wing is irregularly 
sprinkled with blackish scales and contains on the cell an ill-defined, round, blackish 
spot, sometimes divided into an upper and lower spot; there is also a smaller spot on the 
base of the cell; the pattern of the wing is rather vague and there is considerable 
variation in different specimens; in many there is an ill-defined blackish fascia at 
apical fourth just before the light costal dash, but in other specimens this fascia is 
not present and the round dorsal spot is dissolved into several smaller spots. Cilia 
light ocherous brown, streaked with blackish. Hindwings dark fuscous, somewhat 
iridescent, lightest towards base; cilia ocherous, terminal and apical parts suffused 
with dark fuscous: vein ic with long, ocherous fuscous hairs on the upper, side. 
Abdomen flattened and ocherous above, dark brown laterally with underside suffused 
with black and with ocherous scaling at the joints. Legs (PI. 8, A) blackish fuscous 
with narrow ocherous annulations at the joints. The abdomen is very similarly 
shaped in the male and in the female and it is exceedingly difficult to distinguish the 
sexes, even in living moths, without dissection or by examination of the frenulum. 
The male genitalia (PI. 8, B) are remarkably small in proportion to the size of the 
species: harpes narrow at base, broadening towards tip; tip strongly haired; a 
cluster of long, heavy, straight spines from inner side, well within the tip; sacculus 
armed on its edge with a row of stout spines; uncus moderately long, broad at base, 
tapering to a [point, laterally heavily haired; aedceagus short, stout, with a terminal 
hook. In the female the ovipositor is weakly chitinized, covered with stiff hairs; 
genital plate heart shaped; bursa copulatrix with two opposite, strongly chitinized, 
hornlike, serrated invaginations (PI. 8, C). 
Alar expanse 15 to 20 mm. 
Full-grown larva.— The full-grown larva (PI. n, A) is n to 13 mm. long, 
cylindrical, white, with dorsal side strongly suffused with pink. Head reddish brown 
with blackish brown mandibles and the other trophi yellowish. Thoracic shield 
rather small, divided in the middle, dark brown. Anal plate small, dark brown. 
Tubercles small, but distinct, yellowish brown, surrounded by deeper pink than the 
prevalent suffusion and bearing rather short, dark-brown setae. Crotches of abdomi¬ 
nal feet 15 to 17. 
