44 MEDICAL ENTOMOLOGY 



E. Outside of the corpuscles in the preparations already ex- 

 amined search for flagellated bodies, the microgametes (sperma- 

 tozoans), or male sexual elements. These are produced from 

 crescent-containing blood on exposure to air for a few minutes. 

 (Some species do not form crescents before flagellation, e. g. the 

 benign tertian and the quartan.) 



F. In a stained preparation of the salivary glands of a malaria- 

 infested Anopheles mosquito determine the presence of sporo- 

 zotts, recognizable as slender, slightly curved rods. 



G. In a stained preparation of the midgut of a malaria- 

 infested Anopheles mosquito, determine the presence of sporo- 

 blasts, as pigmented bodies (elongate, as sporozoits when ad- 

 vanced) inside of cysts recognizable as wart-like bodies external 

 to the gut. 



H. As a matter of comparison examine a blood smear of Texas 

 cattle fever, and study and draw the causative organism Babesia 

 (Piroplasma) bigeminum with reference to form and relative 

 size. This organism is carried by the cattle tick, Margaropus 

 annulatus. 



