ca 
832 General Notes. [August, 
low the cover-glass. The striation of the border of the body was 
well marked in both forms, an s one of the most noticeable 
features. It has not been represented in any figures of M. sig- 
modes, and it may be concluded that it was absent, for if present 
it could not fail to have been delineated. On account of this 
peculiarity, present in both the forms, which resemble each other 
so slightly, but which are evidently the same species, I propose 
to name the form M. striatus. Although certain features charac- 
teristic of the normal form are thus absent from the shortened, 
still the normal form and that of M. sigmoides have very distinct 
differences, and so with the two shortened forms, and there is 
therefore a strong probability of the distinctness of the species. 
may mention here that for killing Infusoria, provided only a 
temporary preparation is required, I find a saturated solution of 
corrosive sublimate in water the most useful of any I have tried’ 
A drop or two run under the cover-glass produces almost instant 
death without any of the shrinkage so annoying even with osmic 
acid. After this treatment I find that staining with aniline blue, 
black or Bismarck brown takes place very rapidly and very satis 
factorily.—/. Playfair McMurrich, Agricultural College, Guelph, 
Canada. 
TAIN MITES. — 
i , Mr. A.D. 
Michael, in a paper read to the Linnean Society of Lo 
cludes that true “ Hypopi” are not adult animals, d allied 
stage, or heteromorphous nymphs of Tyroglyphus an +h latter 
genera. Nor do all individuals become “ Hypopi,’ whi 
LIFE-HISTORY OF THE HYPOPUS STAGE OF CER 
tive of adverse conditions. “ Hypopi” are not truly F new 
adult form described is called by the author Dispartpes nnadiev’s 
he believes there are other species of the genus., certain if 
bee-parasites are admitted to be adults, though it 1s un 
they are identical with Dufour’s Trichodactylus. 
} i the NATU- 
Dors THe Crow Brackpirp EAT CRAYFISH ?— In 
RALIST for November, 1881, this question is asked by Ae 
F E. 
p have aot 32 
1 Meckel’s fluid with acetic acid, as recommended by Brass, 
4 
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