CLASS INSECTS, 



451 



not undergo a metamorphosis. As indicated by their name, 

 they live on the bodies of other animals, whose veins they 

 suck. They form two genera, the pediculus (Fig. 49J ), and 





Fig. 4S3. The Flea. Fig. 484. The Nepa. Fig. 485. The Bug. 

 Water Scorpion. 



Fig. 486. (Estrus, or 

 Bat-fly. 



Fig. 487. The Ox-fly, or Gad-fly. 



Fig. 488.* 



* 1. The Ligurian Bee (apis ligustrica) ; 2. the Banded Bee (apis fas- 

 ciata) ; described by M. Isidore Geoffroy St. Hilaire. K. K. 

 G G 2 



