180 GRAMMAR OF ENTOMOLOGY. 



time to time as it increases in bulk ; feeds on 

 woollen cloths, hair, and decayed animal and 

 vegetable substances. Pupa elongate ; changes 

 within the sack. Imago with filiform antennae, 

 and narrow wings ; flight gregarious, rising and 

 falling. Tinea, and allied genera. 



657. Plume-moths (Alucitites). Larva slen- 

 der, with ten prehensile feet; the anterior part 

 capable of great attenuation and extension, in 

 the manner of a leech. Pupa elongate ; changes 

 in a silken cocoon. Imago with filiform antennae ; 

 wings extended at right angles with the body ; 

 very narrow, and divided to the base, each divi- 

 sion having the appearance of a perfect and dis- 

 tinct feather. Pterophorus, Alucita. 



