MONOGRAPH! A 



Females with five ovaries on each side the uterus, (pi. 19. 

 fig. 3.) Coitus exercetur mare femine submisso. Food the 

 blood of animals. 



O 



HH 

 P 



w 



PH 



ARTIFICIAL DIVISIONS OF THE FAMILY. 



f I. Legs of two kinds, anterior 

 ambulatory, posterior scan- 

 sorial; thorax large, not dis- 

 tinctly separated from the 

 abdomen Genus I. PHTUIRIUS. 



I 1 . Legs all scansorial ; thorax 

 large, not distinctly sepa- 

 rated from the abdomen; 



abdomen of seven segments. Genus II. PEDICULUS. 



III. Legs all scansorial; thorax 

 generally narrower than the 

 abdomen, and distinctly se- 

 parated ; abdomen of eight 



L or nine segments. . . Genus III. H.E MA TO PIN us. 



