23 
was of a tough, leathery, elastic character, and had a number 
of patches of minute prickles on them. The under surface of 
the body was slightly flattened, and the skin had a wrinkled 
appearance. I put these maggots in some soil in a pot, 
covering them to the depth of one inch, stretching some 
muslin over the top. The next day they had wriggled their 
way to the surface of the soil. Some of them died, but by 
keeping the soil moist the remainder kept alive. In a few 
days their skins became quite hard and stiff, and turned quite 
black in colour. All of them afterwards died and moulded 
except one, which I opened on June 19th, and found it partly 
filled with a clear liquid. In this liquid was a whitish semi¬ 
solid substance in the shape of an insect. The top of the 
chrysalis came off like a lid. Some of the warbles were 
scarcely perceptible to the touch on April 23rd, and the 
orifice was very small—about the size of the prick of a 
common darning needle ; but others were as large as half a 
walnut, with an orifice about -k inch in diameter. Some 
of the warble holes were covered with dried gummy matter 
which had exuded from the maggots, while others were quite 
free from it. A month afterwards, in looking over the heifers 
from which I ejected the maggots, I found that nearly all the 
holes were healed up; in others, where I had applied 
mercurial ointment, the dried-up maggot was protruding from 
the orifice about half an inch, and were easily pulled out of the 
hole. They were black and shrivelled up. There were a 
quantity of maggots in warbles in the beginning of June. 
On June 10th, the maggots were nearly matured and ready to 
fall out. On June 25th, I pressed some maggots out of 
warbles on yearling bulls, and covered them with soil about 
one inch deep in a pot, covering the whole with gauze. The 
following day, two of them had found their way to the top, 
and were lying bare. They afterwards died. I believe the 
reason why they did not live, and turn into the fly state, was 
that by pressing them out of the warbles I either did them 
some injury, or that they were not ready for the chrysalis 
state. 
The chrysalis is dark brown or black in colour, and much 
resembles the maggot in appearance, but is flatter on one 
side. Its external coat is the hardened skin of the maggot, 
