ANIMAL PARASITES. 



145 



It has a characteristic odor. It is entirely nocturnal in its 

 habits, sucking blood at night and hiding in the cracks 

 of the bed, of cupboards, etc., in the daytime. This 

 pest can usually be eradicated from beds, etc., by 

 washing with bichloride of mercury (1-500), pure 

 carbolic acid, or kerosene. 



Where the room or building is so badly infested that 

 these measures do not sufhce, fumigation with sulphur 



Fig. 19. — Sarcopsylla (pulex) petietrans: 

 young female, enlarged. (After Braun.) 



Fig. 20. — Bed-bug; 

 I, side view; 2, back view. 



(i pound to each looo cubic feet of space) is a reliable 

 measure. No moisture is required as in the case of 

 fumigation against bacteria, so that fabrics are not 

 necessarily injured, and the exposure need not be longer 

 than two or three hours. 



Pediculi or lice are found chiefly in two 

 Pediculi. situations on the body, in the hair of the 

 head (pediculi capitis), and in the pubic 

 hairs (pediculi pubis or inguinalis). 



