CHAPTER XXVII 



MASTIGOPHORAi 



Herpetomonas Muscae (Domesticae).''— rThis flagellate proto- 

 zoon is commonly found in the intestine of the house fly {Musca 

 domestica). The cell body is spindle shaped (Fig. 154) and 15 to 

 25/i in length. The flagellum is of about 

 equal length and contains two stainable 

 filaments which terminate near the deeply 

 staining blepharoplast situated in the 

 anterior part (flagellated end) of the cell. 

 From this blepharoplast a delicate thread 

 extends in the cytoplasm toward the pos- 

 terior end. The nucleus (trophonucleus) 

 is at the center of the cell. Multiplication 

 takes place by longitudinal division. 



Leptomonas (Herpetomonas) Culicis.' 

 In the digestive tract of mosquitoes, 

 flagellated organisms occur which bear a 

 confusing resemblance to trypanosomes. 

 They multiply abundantly in the blood 

 which the inject ingests and are most easily 

 found in the mosquito near the end of 

 digestion of a blood meal (48 to 96 hours 

 after feeding). The body is 16 to 45/i in length and 0.5 to 2^ 

 in width. Artificial cultures have been obtained in the condensa- 

 tion water of blood-agar and these have been purified by streaking 



' Only a few protozoal forms can be considered and those very briefly. The 

 interested student should consult Doflein: Protozoenkunde, III Auflage, Jena, rpii. 

 ' Prowazek, Arb. Kais. Gesundheitsamt., 1904, Bd. XX, S. 440. 

 ' Novy, MacNeal and Torrey: Journ. Inf. Dis., 1907, Vol. IV, p. 223. 



397 



Fig. 154. — Herpetomonas 

 musccB. a. Normal indi- 

 vidual; b, dividing' form; 

 c, mode of division of the 

 blepharoplast. {From 



Doflein after Prowazek.) 



