-83- 
Un identified species of Diptera 
See Kelsall et el. (l59_) under Musca domes t ice -, on r> . 31.. 
Geoffroy ( 105 ) in 1895 described the following test made with nicouline 
(rotenone) extracted from the root of Lonchocarous nicou : Flies were placed 
tinder a bell "*ith a piece of sugar dried in en oven efter being dipioed into 
an alcoholic solution saturated with nicouline. The flies th?t c?ne to the 
sugar did not take long to fall; they became lifeless, .unable to fly, and 
manifested their vitality only by an intermittent trembling of feet and 
wings. 
Daniels (6_5_) in 1905 wrote that the effects of derris on dipterous 
larvae in cesspits filled -ith semisolid materiel are local only. 
Gilmer ( 110 ) in 1923 reported that derris powder -hen blown into the 
air is not effective against flies. 
The Handelsmuseum of the Koloniaal I n stituut (161) of Amsterdam in 
1930 stated that flies and fly larvae appeared to be immune to derris 
emulsion, 
Schmitt ( 246 ) in 1930 reviewed the use of Derris ell in t ice as an 
insecticde. Dusting with the finely pulverized root -as effective against 
flies. 
Campbell and Sullivan (52) in 1933 re-norted Te^hrosie l^tidens from 
Florida to be less effective then a sample of derris when tested as a 
kerosene extract against flies. 
Gnedinger ( 117 ) in 1933 reviewed the literature on rotenone in fly 
s-oreys and cited unpublished -ork by Ginsburg, -hich indicates that the 
pyrethrins are more toxic than rotenone to flies. 
A writer called "0. H." ( 128 ) in 1933 stated that it -as possible 
to use a derris root extract in -olace of arsenic in the preparation of 
fly paper. 
Spoon ( 257 ) in 1933 reported tests of rotenone as an insecticide 
in Holland and stated that rotenone a-npe?red to have no value against 
full-grown 'files. 
Worsley ( 326 ) in 1934 reported thet egeinst flies tephrosin had been 
found to be as effective as pyrethrusi -provided the insects were actuelly 
hit with it; pyrethrum, however, had a temporary renellent effect for a 
short time after spraying, a property which te-nhrosin does not nossess, 
Pearson ( 228 ) in 1935 reported on the role of pine oil in cattle- fly 
sprays. Tests were made with a commercial -pine-oil extract of derris 
