626 



AN INTRODUCTION TO ENTOMOLOGY 



Fig. 767. — Wings of Pectinophora gossypiella. 

 Busck.) 



(After 



unites with it ; and in some forms, veins R4 and R5 coalesce through- 

 out their length , but 

 they are usually 

 stalked. The hind 

 wings are usually 

 more or less trape- 

 zoidal; and the 

 outer margin is 

 usually sinuate or 

 emarginate below 

 the apex. 



The larva? vary 

 greatly in habits ; 

 some are leaf-min- 

 ers; but more feed 

 in rolled or spun to- 

 gether leaves or in 

 stems orseed heads; 

 and one is a serious 

 pest of stored grain. 

 This is the larg- 

 est family of the 

 Microfrenatae ; 

 more than four hundred species have been described from our fauna. 



A revision of the 

 American moths 

 of this family was 

 published by 

 Busck ('03). 



The Angou- 

 mois grain-moth, 

 Sitdtroga cerealel- 

 la. — The larva of 

 this moth feeds 

 upon seeds, and 

 especially upon 

 stored grain. It 

 occurs through- 

 out our countr>^ ; 

 but it is especial- 

 ly destructive in 

 the Southern 

 States. In that 

 part of the coun- 

 try it is extreme- 

 ly difficult to 

 keep grain long 

 on account of 

 this pest and cer- 



Fig. 768. — Paralechia pinifoliella: larva, pupa, adult, and 

 leaves mined by the larva. (From the Author's Report 

 for 1879.) 



