CHAPTER XXVII. 



MASTIGOPHORA. 1 



Herpetomonas Muscae (Domesticae). 2 This flagellate proto- 

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

 domestica). The cell body is spindle shaped (Fig. 146) and 15 to 

 to 2 5 A* 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 deli- 

 cate thread extends in the cytoplasm to- 

 ward the posterior end. The nucleus (tro- 

 phonucleus) is at the center of the cell. 

 Multiplication takes place by longitudinal 

 division. 



Leptomonas (Herpetomonas) Culicis. 3 

 In the digestive tract of mosquitoes, 

 flagellated organisms occur which bear a 



FIG. 146. Herpetomonas 



a, Normal indi- confusing resemblance to trypanosomes. 

 Th fy >ltiply abundantly in the blood 

 which the insect ingests and are most 



.. f . . . 



easily found in the mosquito near the end 

 of digestion of a blood meal (48 to 96 hours after feeding). The 

 body is 1 6 to 45 ju in length and 0.5 to 2/4 in width. Artificial 

 cultures have been obtained in the condensation water of blood- 

 agar and these have been purified by streaking on blood-agar 



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

 interested student should consult Doflein: Protozoenkunde, III Auflage, Jena, 1911. 



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

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



378 



blepharoplast. (From 



Doflein after Prowazek.) 



