384 T. gallinarum and T. gambiense in Fowls and Ducks. 



From June 19 to 24, 1911, duck Experiment 144 was fed upon daily by 

 flies known to be infective for T. gambiense. After a lapse of 16 days 

 laboratory-bred flies were fed upon Duck 144, as shown in the preceding 

 table. 



On January 16, 1912, Duck 144 was killed and 6 c.c. of its citrated blood 

 injected into a monkey. This monkey remained healthy and never showed 

 trypanosomes in its blood. 



Conclusions. 



1. That T. gallinarum can multiply in the gut of G. palpalis, although this 

 fly is probably not the normal host. 



2. That Muscovite ducks are not capable of acting as a reservoir for 

 T. gambiense. 



DESCEIPTION OF PLATE. 



The figures were all drawn at a multiplication of approximately 3000 diameters with 

 the aid of the drawing apparatus of Abb6. 



Fig. 1. Division stage showing the double appearance of the kinetonucleus and the two 

 trophonuclei. 



Fig. 2. Division stage showing centrodesmose of the trophonucleus spindle. 

 Fig. 3. Slender long form. 



Fig. 4. Division stage showing centrodesmose of the kinetonuclear division apparatus ; 



note double appearance of the kinetonuclei. 

 Fig. 5. Short, broad form from proveutriculus. 

 Figs. 6 and 7. Other forms from proventriculus. 



Fig. 8. Typical broad form showing posterior granule and lines to tropbonucleus and 



kinetonucleus. 

 Fig. 9. Multiple division. 



Figs. 10 and 11. Very typical forms from the ordinary type of gut infection. 

 Figs. 12 and 13. Slender forms from proventriculus ; these forms are also found further 

 back in the mid and hind gut. 



