longitudinally and has an undulating membrane 

 (periplast), which is continued at each end in the form 

 of a flagellum. Intracorpuscular forms are also 

 described. Transmission is probably by ticks (Ixodine). 



OTHER SPIROCHAETES 



1. Sp. equi. In the horse in French Guinea. 

 1 2- 1 5/4, with three to four undulations. 



2. Sp. ovina. In sheep in Erythraea, possibly 

 identical with S. theileri. 



3. Sp. gondii. In thegundi, Ctenodactylus gondi, 

 N. Africa. 



4. Sp. jonesi. In an African fish (Clarias 

 angolensis). Has a rigid appearance, unlike a spiro- 

 chaete. 



5. Spirochaetes have recently been cultivated by 

 Topfer from the blood of owls (? species). Owls not 

 uncommonly also contain trypanosomes. 



SPIROCHAETES IN INSECTS 



Sp. culicis (Jaffe). In the gut of larvae of Culex 

 sp. in temperate zones. 



A. maculipennis. In the gut of the larva, 8-17/4, 

 with one to four nodes. 



C. pipiens. (i) In the malpighian tubes in abun- 

 dance (after feeding on blood), 25-30/4, with three to 

 eight nodes. (2) In the gut, one species with two to 

 three nodes, and another species, 15-25/4, with five to 

 ten nodes. 



Chironomus plumosus. In the gut, 15-20/4, with 

 four to five nodes. 



Glossina spp. Also in the gut. 



