26 



Fig. 7. The bag-worm, a, larva ; 6 pupa ; c, adult female ; d, adult 

 male; e, bag- containing eggs ; /, bag containing larva; ff, young 

 larvae, with conical cases. (From Riley). 



grown worm measures 1 .75 inch in length and its greatest 

 diameter is somewhat more than .50 inch. If cases are 

 examined during the winter a large number will be 

 found empty, these being old ones which adhere to the 

 twigs longer than one season, or else are those which 

 produced males. In every one which produced a female 

 the preceding summer will be found an oblong brown 

 cylindrical object tapering a little at one extremity, but 

 blunt and with a ragged opening at the opposite end 

 through which the adult insect escaped ; for these are the 

 deserted pupal skins of the female. Each appears at 

 first to be full of a powdery material, but on rymoving 

 some of this the minute soft whitish eggs will be ob- 

 served packed closely so as to fill the greater part of the 

 skin. 



The adult female of the bag-worm is a very singular 

 creature, looking more like a worm than a moth, incapa- 

 ble of flight, having no rudiments of wings, and with 

 only minute and functionless legs. The very scales of 

 the greater part of her body are abortive, and are rubbed 



