Insects as Intermediate Hosts of Tapeworms 
177 
larvae and adult of a moth, Asopia farinalis, m the earwig, Anisolabis 
annulipes, the Tenebrionid beetles Akis spinosa and Scaurus striatus. 
117. One way in which Dipylidium infection in 
children may occur. After Blanchard. 
Grassi considers that the lepi- 
dopter is the normal inter¬ 
mediate host. The insect takes 
up the eggs scattered by rats 
and mice. It has been experi¬ 
mentally demonstrated that 
man may develop the tape¬ 
worm by swallowing infested 
insects. Natural infection 
probably occurs by ingesting 
such insects with cereals, or 
imperfectly cooked foods. 
Hymenolepis lanceolata, a parasite of geese and ducks, has been 
reported once for man. The supposed cysticercoid occurs in various 
small crustaceans of the family Cyelopidae. 
118 . The probable method by which Dipylidium infection usually occurs. 
