138 PRIZE ESSAY : 



where they abound. All cracks in the floor or walls should be 

 stopped with plaster of Paris, and apertures for ventilation se- 

 cured by fine gauze. Burning sulphur will kill the moths. 

 Grain should be cut early to anticipate the appearance of the 

 moth. (See Patent Office Report for 1849-50, for further in- 

 formation on this subject.) 



249. The Anyoumois 'Moth (Anacampsis Cerealella.) In the 

 Southern States of . the American Union the larva of this moth 

 is said to feed upon the grain in the open fields. In the North- 

 ern States it is found in granaries, and of course we may expect 

 to find it in Canada. 



250. The Angoumois moth (b) is a four-winged insect, about 

 three-eighths of an inch long when its wings are shut (a.) 



(a) (b) 



if \ 



ANGOUMOIS MOTH.(l) 



Its upper wings are narrow, and of a light brown colour, with 

 the lustre of satin. The lower wings and the rest of the body 

 are ash-coloured. The female lays from sixty to ninety eggs on 

 the ears of wheat and other grains. Sometimes the eggs are laid 

 in the field, sometimes in the granary. They breed twice in the 

 year, there being an early summer and an autumnal brood. Each 

 worm, like caterpillar, selects a single grain into which it bur- 

 rows, and on the flower of which it subsists. 



251. The caterpillar is about a fifth of an inch long ; colour 

 white, with a brownish head ; it has six small-jointed legs, and 



(1) From the Patent Office Report for 1854. 



