eee) 
of his researches in the Comptes Rendus de la Société de Biologie, April, 
1892. The disease manifests itself by patches of a whitish eruption, 
mainly upon the lips, forehead, around the eyes and ears, and upon the 
neck of the animal, the mite causing the disease (Sarcoptes minor Furst) 
being found in vast numbers beneath the crusts of thiseruption. The 
author’s experiments upon the transmissibility of the disease were made 
by removing these crusts, with the insects beneath. from a diseased toa 
healthy subject. MM. Railliet thinks it would be premature to draw from 
his experiments any fixed conclusions, and gives the following as the 
results of his investigations: 
(1) That it was impossible for him to transmit the itch caused by 
Sarcoptes minor from the rabbit to other rabbits, or to cats, to rats, or 
_ dogs: 
(2) That it is easily transmitted from cat to cat; 
(3) That it is transmitted only with great difficulty from the eat to 
the rabbit; and 
(4) That rabbits which have contracted the disease from a cat can 
transmit it to other rabbits. 
~ 
FUNGUS DISEASE OF THE MIGRATORY LOCUST. 
Apropos to the note on page 151 of the current volume, upon this 
subject, we have received from M. Brongniart, of the Museum d’His- 
toire Naturelle at Paris, a note in which he says: 
It is a pity to let erroneous ideas persist on this subject. My researches—M. Giard 
to the contrary notwithstanding—show that the Migratory Locust (Sehistocerea pere- 
qrina) oiiers several parasites. (1) Two forms of Botrytis, which kill the sects rap- 
idly; (2) certain forms of Fasarium (— Lachnidium acridiorum Giard) which do not 
kill the insect; (3) the form Polyrhizium (Giard),which does not Kill the insect, ete. 
M. Giard and my colleague Kiinckel have not studied the forms Botrytis, and 
therefore conclude that they do not exist, yet Dr. Delacroix and I have clearly 
shown these destructive forms of Botrytis to whomsoever would look. 
THE SALTBUSH SCALE OF AUSTRALIA. 
We noticed. upon page 294 of the last number, Mr. A. Sidney Olliffs 
preliminary notice of a new species of Pulvinaria destroying the fodder- 
plant known as the saltbush, in New South Wales. In No.3, Vol. 1, 
Agricultural Gazette, of New South Wales, he devotes a full:page plate 
to this interesting insect, which he has named Pulvinaria maskelli, and 
gives a full account of its habits, with extended description of the spe- 
cies and descriptions of two of its natural enemies, viz, Thalpochares 
pulvinarie and Chrysopa ramburi Sch. 
A PROPOSED INSECTICIDE POR TEA—BUSHES. 
Mr. G. F. Strawson, in a letter to Bell’s Weekly Messenger of October 
26, proposes the use of a combination of benzine and naphthaline in the 
proportion of one part of the naphthalin to eight of benzine, for use 
=r) 
