62 
BULLETIN 918, TJ. S. DEPARTMENT OE AGRICULTURE. 
Epipharyngeal shield (ES) merely a slight chitinization of the edge of the median 
incision: epipharyngeal setae narrow plates, triangularly grouped near anterior margin. 
Epipharyngeal rods not discernible in the labrum proper, only represented by their 
posterior projections, which are rather well developed. 
Mandibles (fig. 5. A-D) strong, as broad as long, with four stout, rather short teeth: 
the three lower ones pointed ; the upper blunt : a fifth lower tooth is slightly indicated 
on the underside: one long and one shorter seta on upper side near lower edge. 
Labium and maxillae normal (fig. 8, C). 
Antennae (fig. 5. E) four-jointed, with second joint considerably longer than joint 
3, longer than broad; the longer seta longer than the entire antenna; papillae minute, 
muchTshorter than third joint. 
Three pairs of normal thoracic feet; four pairs of abdominal prolegs with crotches 
of uniform size in an incomplete circle, opening outwardly (fig. 5, H); anal prolegs 
with a transverse row of uniordinal hooks. 
The arrangement of the body setae is normal, as shown in figure 10. A. B. It differs 
from that of Gelechia in having the three setae on prespiracular plate of prothorax 
nearly equidistant, while in Gelechia the posterior seta is farther separated from the 
two others than they are from each other, and in having the three setae vii of the 
proleg-b earing abdominal segments arranged in a triangle, not in a line as in Gelechia. 
9 JP J 
Fig. 8.— Pink boll-worm. A, larval head from underside. B, Seta arrangement of epieranium in figure A: 
J, Ocellus i; II, ocellus ii: HI. ocellus iii: IV, ocellus iv: V. ocellus" v: VI. ocellus vi; Oi, ocellar seta 
1; 2 ocellar seta 2; 3 , ocellar seta 3; Oa, ocellar puncture; SOi. subocellar seta 1: S0 2 . subocellar 
seta 2; SO3, subocellar seta 3; SOa, subocellar puncture: <?i, genal seta; Ga, genal puncture. C, La- 
bium and maxillae: sp, Spinneret; Ip, labial palpus; 1, lacinia and galea; m, mentum; sm, submen- 
tum; cr, cardo; st, stripes; pig, palpiger; m pi, maxillary palpus,, first joint; m p 2 , maxillary palpus, sec- ■ 
ond joint; mp 3 . maxillary palpus, third joint. (Busck.) 
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; F l and P 2 are posterior, respectively, to Adf x and 
Adf 2 . which in Gelechia are nearly opposite to these, and L x is posterior to Pj, 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 (fig. 5, K). 
In Gelechia they are biordinal and in a complete circle. 
Pupa. — The pupa of Pectinophora 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 (fig. 4. 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. Antennae brown with narrow black annulations; 
