PARASITA 



163 



chitinous eminence, and there is a broad black band on the 

 last segment, broken near the middle. (See Fig. 118.) 



The male has the abdomen marked beneath with a large 

 black area extending forward from the end of the terminal 

 segment, so as to occupy the central portion of the last 

 three seg^ments. 



Fig. 118. — Hcematopinus urius: a, female; b, ventral view of posterior 

 segments of male; c, leg, showing protractile disk of tibia — enlarged. 

 (.•Vuthor's illustration, Bur. Ent., U. S. Dept. Ag.) 



A curious provision is found in the feet for strengthening 

 the hold upon the hair. It consists of a circular pad-like 

 organ or disk in the outer portion of the tibia, which is 

 received in a conical cavity in the end of the tibia, and which 

 can be forced out so as to press upon the hair held between 

 the claw of the tarsus and the end of the tibia. 



