259 
occasionally found in the Human Body. 
dressed provisions ; and as Sphodrus, Blaps and Tenebrio frequent 
the cellars of many of our houses, they at night, when in search 
of food, probably enter the larders and safes where provisions are 
kept, and deposit their ova in cheese, butter, bread, pastry, and 
even in cold meat. As to the larvae of carnivorous Coleoplera 
entering the body, there is no need of any explanation here, as it 
is generally acknowledged they will attack dressed as well as un- 
dressed pi o visions. I therefore proceed to the consideration of 
the genera producing Myasis, or the fly-disease. There appears 
to be four different modes of accounting for it. First, the insects 
deposit their ova on the living person ; secondly, they deposit 
them on dressed meat, and are taken with it into the stomach ; 
thirdly, we sometimes swallow ova in too ripe fruit, or in un- 
boiled vegetables, such as water-cresses and salads ; and, fourthly, 
we may swallow ova as well as larvae in impure and turbid water. 
Scholechiasis is probably occasioned also by swallowing raw vege- 
tables on which eggs have already been deposited ; at least one 
case appears clearly made out, namely, that of a young boy who 
had repeatedly eaten raw cabbage ; the larvae voided by the 
mouth appearing the same as the caterpillars of the common white 
cabbage butterfly (P. Brassicce, Lin.) 
In concluding these remarks, 1 beg leave publicly to thank se- 
veral individuals present wdio have kindly given me their assist- 
ance by informing me of various cases, and for the loan, as well 
as exhibition, of specimens to illustrate my paper. I trust I may 
indulge the hope that some of the medical profession may be in- 
duced to devote part of their time and leisure hours to a study 
worthy of their skill and attention. Any assistance this Society 
can give I may promise will be cheerfully granted. The ento- 
mologist can name the insects which attack our persons, and 
detail their general habits and economy. To the medical profes- 
sion we leave the discovery of antidotes adapted to relieve human 
suffering, and there will be a debt of gratitude due to those indi- 
viduals who are fortunate enough to suggest remedies capable of 
mitigating and subduing the unparalleled tortures occasioned by 
insectal disease. 
Figures 2, 3, 4, and 5, in Plate XXII., represent various larvae obtained from 
the human subject contained in the Museum of the College of Surgeons. 
Fig. 3 and 4 are closely allied to the larva of Anthomyia canicularis of Meigen, 
figured in Plate XV. 
Fig. 5 evidently belongs to a species of (Estridte. 
Fig. 1 and 1 a, represent the larva of a species of the last-named family, which 
infests the rhinoceros, from the same Museum, whence it has been named 
CE. Rhinocerontis, Owen. 
