The Animal Parasites of Man

by Harold Benjamin Fantham; Max Braun; J. W. W. Stephens; Fred. V. Theobald

Fig. 382.—Pulex irritans. 14/1.

Fig. 383.—Larva of flea. Enlarged. (After Railliet.)

Fig. 384.—Pulex serraticeps. 22/1.

Fleas live in human dwellings all over the world, and periodically pass on to persons to suck their blood. They may deposit their eggs on very uncleanly individuals, and even undergo development, therefore it is possible to find larvæ and pupæ on such persons.