PROTOMONADIDA 



143 



arboreus in the sand dunes on California coast. Multiple division 

 and endogenous budding characterize this species, 



Crithidia gerridis Patton (Fig. 51, d). In the gut of several 

 species of water bugs belonging to the genera Gerris and Micro- 

 velia. Total length 22 to 45 microns. 



Fig. 51 a-c. Crithidia euryophthalmi. X 875 (After McCulloch). 

 a, b, from the mid-gut; c, from the rectum. 

 C. gerridis. X1070 (After Becker). 

 C. hyalommae. XIOOO (After O'Farrell). 

 Leptomonas ctenocephali. XIOOO (After Wenyon). 

 Phytomonas elmassiani. X1500 (After Holmes), 

 i, from milkweed, Asclepias sp.; j, from the gut of a 

 suspected transmitter, the bug, Oncopeltus fasciatus. 

 Herpetomonas muscarum. X1070 (After Becker). 

 \'arious phases of H. drosophilae. XIOOO (After 

 Chatton and Leger). 



d. 

 e,f. 



g.h. 

 i. J- 



k. 

 1-n. 



Crithidia hyalommae O'Farrell (Fig. 51, e,/). In the body 

 cavity of the tick {Hyalomma aegyptium) of the cattle in Egypt. 

 The flagellate through its invasion of ova is said to be capable 

 of infecting the offspring while it is still in the body of the 

 parent tick. 



Genus Leptomonas Kent. Exclusively parasitic in inver- 

 tebrates. The blepharoplast is very close to the end beyond 

 which the fiagellum projects, and therefore there is no undulat- 

 ing membrane (Fig. 47). Non-flagellate phase resembles Leish- 

 mania. 



