2 3 



THE INSECTS. 



and deposits its eggs in the clothing. It is almost twice the size of the 

 P. capitis and the abdominal segment is broader than the thorax. 



Phthirius pubis. This louse is popularly known as the crab- 

 louse. The female is little more than 1/25 of an inch in length, and 

 the male a trifle less. They are almost square. They have a pref- 

 erence for the white race and live about the pubic region. The 

 female lays about a dozen eggs, which hatch out in about a w r eek. 



FIG. 71. Important Rhynchota. i, Head louse; 2, body louse; 3 crab louse; 

 4, bed bug; 5, mexican bed bug (Conorhinus sanguisuga). 



The Acanthiidae. 



These have a flattened body, a 3 -jointed rostrum and 4-jointed 

 antennae. Their wings are atrophied. 



Acanthia lectularia. This is the cosmopolitan bed-bug. It 

 measures about 1/5 by i/ 8 of an inch. It is of a brownish-red color. 

 The bed^bug^lives in cracks and crevices, especially about beds. It is 

 said they can migrate from house to house. At any rate, they are 



