244, BE. A. MINCHIN. 
163, 164). A count gave the following numbers of the 
different types : 
Large, Large, Medium- Slender, Divid- 
jimi) gers SEU os, Hote me 
1st smear 248 90 27 27 = «108 9 
2nd smear 258 24, 37 13 94 8 
Total. 506 114 64 40 197 7 
Percentage » 03946 1255 16:82) 04°26." 321 1°81] 
Of the contents of the proctodzeum I have two smears ; in 
one, which I may call the pure smear, there are no blood- 
corpuscles; in the other there is a slight admixture of black 
blood and the preparation contains blood-corpuscles. The 
trypanosomes show the same types as in the black blood 
(figs. 165-170), and a count of the pure smear gave the 
following results : 
Large, Large, Small Medium- Slender, Divid- 
slender. stout. * sized. H-like. ing. 
Numbers 258 62 21 A 106 24: 
Percentage 54-31 13° 4°42) 0°84" 227319 05 
Comparison of the figures shows that the percentage of 
Herpetomonas-like forms is about the same in the black 
blood and the proctodzum. 
Nov. 14th (264 hours after infection)—Three flies (all 
males) were dissected. In two of them the stomach con- 
tained no red blood, but numerous bacteria, and the intestine 
contained blackish fluid; in both of these the proventriculus, 
stomach, intestine, protodeeum, testes, and seminal vesicles, 
and in one the salivary glands, were examined without finding 
any trypanosomes. 
In the third fly the digestive tract was found gorged with 
blood, both red in the stomach and black in the intestine. 
Trypanosoma grayi was found present in stupendous 
numbers throughout the stomach, intestine, and procto- 
deesum; in the last named the trypanosomes were found both 
