HISTORY OF INSECTS. 25 



and maintaining their hold by means of their 

 hooked jaws. 



70. The maggots make small round holes in 

 the white tissue, sometimes so deep as to go com- 

 pletely through it, but not through the other coats 

 of the stomach ; the colour of the maggot is a 

 whitish red, and the segments of its body are 

 surrounded with a double row of horny bristles, 

 a longer and a shorter series ; the last two seg- 

 ments are destitute of these bristles : the bristles 

 are of a reddish colour, with black points, which 

 are directed towards the posterior extremity of the 

 maggot. 



71. The food of the maggot appears to consist 

 entirely of the coat of the horse's stomach, or of 

 some fluid secreted from it, and not in any degree 

 of the vegetable matter taken into the horse's 

 stomach as food : the maggots pass the autumn, 

 winter, and spring in the stomach of the horse, 

 thus taking nearly a year to arrive at their 

 growth. 



72. When full grown, these maggots quit their 

 hold of the coat of the stomach, are carried 

 through the intestines with the food, and fall to 

 the ground, where their skin hardens, and they 

 become pupae, in which state they turn to a darker 

 colour, but preserve, in a great degree, the shape 

 and character which they possessed as larvae. 



73. In about twenty days after falling to the 

 ground, the shell of the pupa opens at the smaller 



