66 
One day while coming down the Kasai the Captain, finding it c Id, put > V • 
cloth jacket. Many more tsetses were not- than on the vfeik 
duck suits of the European passengers and of the negro steersman 
The flies seem to find their hosts rather by sight than by Mnnll, sin. e in i gne 
locality a moving person is usually more troubled by them than i» one wh- .u% *•:'.! 
The persistency with which Glossitta /'<>//'■ attacks 
despite slapping and brushing is very characteristic As has alrrah 
been stated, its flight is ordinarily rapid and darting It is usually 
accompanied by a peculiar and charSU ' i m fly can 
nevertheless, if it wishes, fly as noiselessly as an Anophelt A fuD\ 
gorged fly is exceedingly heavy on the wing, and Utoall] 1 t only a 
yard or two before taking refuge in some quiet corner, where it 
quickly lightens itself by the rapid extrusion per tt n urn of large 
quantities of colourless serum. Immediately . goes 
through an elaborate toilet and carefully deans .is proboscis. W 
times just after feeding a drop of blood has been seen adher.ng to Ihr 
outside of the proboscis at about its middle. 
If a tsetse (G. fusca or G. pal pahs) be held by its «ingl. or other- 
Z d t C3n bC " lade *° drop Tclear Hod 
from the ,p of tts proboscis. Koch has made a sin, 1 
association w 7 tha ‘ ■» * .unly found . 
plants were pointed™'^ One Z ConR " ,W ° 
other a variety of mimosa Rotl * *° n ° f ^ ^ 
river bank, and therefore were ' fZ '°' V lanH alon S 
Needless to say, the flies h . * Ways Seen whcrr tsetses existed 
both were absent. ^ ° en ' 'l'"’"' l\ seen in n! 
was found to be ab^mhomZ' 1 ' 0 " 3S WeD “ U ‘ e fact ,hal 
tatsed the question whether th, '' PP '>rcntly well suited to it hare 
given locality may not varv T nun,bers of ‘wise flies present m a 
influences. No satisfactory^ *** ® rea,ly * hrou 8 h seasonal or other 
observations are, however 7,e 7 ^ hCe " obtained The following 
ts At fl Matadi and elsewhere h ^ th ' S c °nnection 
Br-h” t n S s S s ^ 2> “ / “l in '*>• t-ambi*. « J the 
b “ e more ««c.ly i „? h " ,T " y : ana «*•« that i„ Kit, Ini' ]t‘. 
more numeroui 
f-t/fa/ii p n wH il 
.in., Forw-hnngmir 
• ^7- 'ov. aj, iqoj. 
nark 
