534 
M. FEANCIS. 
tinge; slight stamping of hind feet and wandering about the 
stall; pulse, 45 ; temperature, 9 y°. 
Februar) 7 8th, the animal was about the same with better 
appetite; pulse, 45 ; temperature,95 0 ; animal more quiet and 
drowsy : fasces small, hard and scanty. 
From February 6th to 8th, the foil-ball compound of fifteen 
grains quinine and one grain strychnine were given three 
times daily. 
From February 8th to 10th the following dose was given 
three times daily : Strychnine, grains, lss; alcohol, 1 oz.; car¬ 
bonate ammonia, 11 drachms; fluid canadensis, 11 drachms. 
February nth the horse was very uneasy, wandering 
around the stall, staggering, falling and rising again, rubbing 
nose on manger and walls of barn ; head swollen; respiration 
difficult; temperature, 99 0 ; could not take pulse. The horse 
was destroyed ; post mortem lesions were very slight so far as 
I was able to determine, with the exception of the viscera, 
which were very pale. 
THE SCREW-WORM. 
By M. Francis, D.Y.M., Texas Agricultural Experiment Station. 
In the first annual report of this station I published 
some notes on the screw-worm, giving only such facts as 1 had 
witnessed, and remedies that I had employed. After two 
years of study and observation, during the summer months of 
which I have seen cases of the parasite almost daily, it is 
thought advisable to give a more exhaustive report of the life 
history of the insect. 
The screw-worm is the larva or maggot of a dipterous in¬ 
sect (Lucilia mace liar ia ) that is very common in this portion of 
the country during the summer, and is parasitic on man and 
animals. 
The mature insect (“ Imago ”) is a fly, a trifle larger than 
our ordinary house fly, with a yellow head and three dark 
longitudinal lines on the thorax. The abdomen is yellowish 
green. The fly lays its eggs in wound sores, and even in the 
natural openings of man and animals. 
