58H 



ZOOLOGY 



SECT. 



House-flies and Blow-flies, Bot-flies (Fig. 474), Crane-flies and 

 "Daddy-long-legs." 



FIG. 473. Pulex (mosquito) and larva. 

 (After Guerin and Perclieron.) 



FIG. 474. Bot-fly of the horse (Gastro 

 philus equi). a, mature insect ; 6, 

 egg attached to a hair ; c, d, and e, stages 

 in the larval development. (After Brehm.) 



ORDER 6. LEPIDOPTERA. 



Insects with both pairs of wings well developed and covered 

 with scales (modified hairs). The maxillae are modified to form 



Fio. 475. Butterfly (Pieris),with caterpillar and chrysalis stages. (After Guerin and Percheron.) 



