298 ENTOMOLOGICAL NEWS. [Oct., '06 



of the abdomen of a female. It was, I judge, rather more than 

 2.0 mm. long and of a light dirty yellow color. I have sent 

 to Esupua to procure if possible some living flies and also some 

 in alcohol so as to be able to send Mr. Austen a series of larvae. 

 The pupa I have not seen." 



THE NEW FLY AND TRYPANOSOMIASIS. 



I have lately seen three cases of human trypanosomiasis, all 

 of whom had been frequently in the "fly belt" at Esupua. 

 About 500 blood examinations were made, so that about three 



Fig. i. Tr. ? g-ambietise Button. 



out of every 500 natives living in the districts adjacent to the 

 Esupua "fly belt" harbor trypanosomes in their blood. The try- 

 panosome found seems to be morphologically identical with Tr. 

 gambiense Button. The shape of the posterior end, the ar- 

 rangement of the controsome, nucleus and flagellum, as well 

 as the "set" of the organism on the slide, correspond with the 

 same points in Tr. gambiense. The protoplasm stains some- 

 what irregularly with Romanowsky, taking on a basophilic 

 reaction. The centrosome stains a dark purple, and the flagel- 

 lum, which stains pink, seems to rise from or near it. The 

 nucleus lies near the middle of the body and often occupies more 

 than two-thirds the width of the parasite. It is oval in shape 

 and stains red like other chromatin material. Following are 

 measurements of a stained specimen of the parasite : 



Length (about) 24 



Greatest width 3.5 



Distance of centrosome from posterior end 3 



Length of free flagellum (about) 9 



Largest diameter of nucleus 4 



