244: 



ENTOMOLOGY FOR MEDICAL OFFICERS 



by the wing- venation (Fig. 112). The larvse burrow in 

 leaves and in all sorts of other things, including wood, 

 corks of bottles, stored grain, dried fruits, potatoes, horn, 

 fur, and clothes. Three species of clothes-moths {Tinea) are 

 known : T. pellionella is brown with a few dark spots on 

 the fore wings ; its larva makes a portable case out of frag- 

 ments of the stuff it eats, and finally pupates in the case : 

 T. tapetzella has black and white fore wings ; its larva also 

 constructs a case : T. biselliella is straw coloured ; its larva 

 does not make a case until it is ready to pupate. Clothes- 

 moths can easily be kept off by the use of the volatile 



FiQ. 112. — Denuded Wing of Tima; the fringe merely indicated. 



insecticides known to all housekeepers, and by periodical 

 airing of clothes ; simple wrapping in brown paper may 

 be sufficient. 



Tortricidm. A large family of Micro- Lepidoptera with the 

 wings broader and not so deeply fringed as those of the 

 Tineids, and the venation of the hind wings slightly different 

 The larvae are known as leaf-rollers, but some burrow in 

 fruit, nuts, and seeds. "Jumping- beans" are seeds that 

 are inhabited by a living larva of a Tortricid. 



