Fig. 1 



Fig. 2 



Fis-. 3 



Fk. 4 



Fig. 1. Pediculus liumanus (corporis), female, in dorsal aspect. 



Fig. 2. Pediculns humnnus (corpori.''), egg on hair, lateral aspect. 



Fig. 3. PJdhinis pubis, female, in dorsal aspect. 



Fig. 4. Phthirus pubis, egg on hair, lateral aspect. 



Note. The eggs are readily differentiated. Tho.se of Phtlurus 

 are shorter, have an operc\dum or lid which is dome-shaped, 

 and are attached to the hair with a larger amount of cement. 



All of the figures are drawn to the same scale. 



