62 



BULLETIN 918, U. S. DEPARTMENT OF AGRICULTURE. 



Epipharyngeal shield (ES) merely a slight chitinization of the edge of the median 

 incision ; epipharyngeal seta? 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 maxillse normal (fig. 8, C). 



Antenna? (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, 

 much shorter 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 seta? is normal, as shown in figure 10, A, B. It differs 

 from that of Gelechia in having the three seta? on prespiracular plate of prothorax 

 nearly equidistant, while in Gelechia the posterior seta is farther separated from the 

 two othera than they are from each other, and in having the three seta? vii of the 

 proleg-bearing abdominal segments arranged in a triangle, not in a line as in Gelechia. 



Fig. 8.— Pink bollworm. A, larval head from underside. B, Seta arrangement of epicranium in figure A: 

 I, Ocellus i; II, ocellus ii; 777, ocellus iii; IV, ocellus iv; V, ocellus v; VI, ocellus vi; 0\, ocellar seta 

 1; Oi ocellar seta 2; O3, ocellar seta 3; Oa, ocellar puncture; SO\. subocellar seta 1; SO2, subocellar 

 seta 2; SO3, subocellar seta 3; SOa, subocellar puncture; Gi, genal seta; Ga, genal puncture. C, La- 

 bium and maxillae: sp, Spinneret; Ip, labial palpus; I, lacinia and galea; m, rnentum; sin, submen- 

 tum; cr, cardo; st, stripes; pig, palpiger; mp\, maxillary palpus, first joint; mpt, maxillary palpus, sec- 

 ond joint; mpi, 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; P x and P 2 are posterior, respectively, to Adf x and 

 Adf 2 , which in Gelechia are nearly opposite to these, and L, 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 (fig. 5, K). 

 In Gelechia they are biordinal and in a complete circle. 



Pupa. — The pupa of Pectinophora gossypiella is pubescent, without any long seta? 

 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. Antenna? brown with narrow black annulations; 



