60 



BULLETIN 918, U. S. DEPARTMENT OF AGRICULTURE. 



stalked to costa, rest separate, lb furcate at base. 6 Hindwings (fig. 7, B) somewhat 

 broader than forewings, 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 (fig. 9, B), with harpes and uncus well 

 developed; tegumen evenly chitinized. Posterior tibise (fig. 9, A) hairy above. 



Larva. — Head (PL V and fig. 8) 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 



D 



Fig. 6.— Pink bollworm. A, Pupa from front: lb, Labrum; /, front; c, clypens; g,gena; mi, mandibles', 

 ge, glaced eye; c, eye; mp, maxillary palpus; mr, maxilla; h, first thoracic leg; h, second thoracic leg; 

 ?3, third thoracic leg; o, antenna; w, fore wing: go, genital opening; ao, anal opening. B, Tip of pupa 

 from left side: c,Cremaster. C, Mature pupa, with eyes of the imago visible through pupal skin. D, Pupa 

 from back: /.Front; v, vertex; h , first thoracic segment ; tz, second thoracic segment; t 3 , third thoracic 

 segment a.\, first abdominal segment: an, second abdominal segment; n 3 , third abdominal segment; a 4 , 

 fourth abdominal segment; a- a , fifth abdominal segment; a 6 , sixth abdominal segment; a 7 , seventh 

 abdominal segment; o s , eighth abdominal segment; ag, ninth abdominal segment; a 10 , tenth abdominal 

 segment. (Busck.) 



dorsal extremities of hind margin about one-half of the width of the head. Front 

 triangular, reaching beyond the middle; adfrontal sutures somewhat undulating, 

 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 parallelogram; iii and iv on a line between ii 

 and v; v smaller than the rest. 7 Epistoma with the usual two pairs of setag (E 1? E 2 ) 

 well developed. 



s The European (Gelcchia) Pectinophora malvclla 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 sometimes 

 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. gossypiclla, where the venation seems constant, 

 as given above. 



7 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, 111., 1915. Bibliography, p. 145-146. Illinois Biological Monographs, v. 2, no. 1.) 



