PARASITOLOGY. 



39 



head is crescent-shaped and scarcely as wide as long. 

 The abdomen is narrow and rather ovoid in form, 

 and is comprised of nine segments. The legs are 

 short and are equipped with claws which aid it ^n 





Fig. 8— Trichodectes Scalaris— magnified. 

 a,Mouih Parts. c, Legs. e. Thorax. 



b, Antennae. 



d, Head. 



f, Abdomen. 



holding on to its host. A few scattering hairs are 

 noted over the head, legs and abdomen. 



Trichodectes Spherocephalus (Spher — a sphere) 



(Cephala — a head). 



Animal Infested. — This louse infests sheep. 



Description. — The head is nearly as wide as lon£\ 

 the anterior part being crescent shaped. The thorax 

 is narrower than the head; the abdomen is oval in 

 shape and the legs are short. It is common. 



