June 4 ,1917 
The Pink Bollworm 
347 
stalked to costa, rest separate, ib furcate at base. 1 Hindwings (fig. 1, B) somewhat 
broader than fore wings, trapezoidal; costa deflected from the middle; apex pointed; 
termen sinuate; 8 veins; 8 connected with cell by an oblique bar; 6 and 7 closely 
approximate at base; 3 and 4 connate; 5 parallel with 4; frenulum simple in the 
males, triple in the females. Male genitalia (PI. 8, B), with harpes and uncus well 
developed; tegumen evenly chitinized. Posterior tibiae (PI. 8, A) hairy above. 
Larva. —Head (text fig. 2 and PI. 9) spherical, nearly circular in outline viewed 
from above, a little wider than long; greatest width a little behind the middle; 
incision of dorsal hind margin about one-fourth of the diameter of the head; distance 
between dorsal extremities of hind margin about one-half of the width of the head. 
Front triangular, reaching beyond the middle; adfrontal sutures somewhat undulating, 
B 
Fig. i .—Pectinophora gossypiella: A, Venation of forewing; B, venation of hindwing. 
reaching to the incision of hind margin; adfrontal ridges converging from near the 
middle, at the point of attachment of tentorial arms, to the longitudinal ridge, which is 
one-half as long as front. Projection of the dorsal margin over the ventral is one-half 
of the diameter of the head. Triangular plates of hypostoma distinctly separated by a 
slightly pigmented gula, nearly equilateral, but somewhat elongated and projecting 
slightly beyond the ventral margin of epicranium. 
Ocelli six; i, ii, v, and vi forming a paralellogram; iii and iv on a line betweenii 
and v; v smaller than the rest. 2 Epistoma with the usual two pairs of setse (Ei, E 2 ) 
well developed. 
1 The European ( Gelechia ) Pectinophora malvetta Zeller exhibits an amount of variation of the venation 
in the forewing which is very unusual in this group of insects. Veins 2 and 3 in this species are some¬ 
times coincident or partly coincident at base or at tip; the variations sometimes differing in the two 
wings of the same insect. No such variation has been ascertained in P. gossypiella, where the venation 
seems constant, as given above. 
2 This numbering of the eyes differs from that of Fracker in that his numbers 5 and 6 are reversed, so 
as to make them continuous with the rest. (Fracker, S. B. The Classification of Lepidopterous Larvae . . . 
169 p., 10 pi. Urbana, Ill., 19x5. Bibliography, p. 145-146. Illinois Biological Monographs, v. 2, no. 1.) 
