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ically recognized. If, as we believe, the insect is not elsewhere found 
in this country, every effort should be made to stamp it out upon the 
few trees which it infests at present. 
A NEW PLANT-LOUSE ENEMY. 
Mr. Webster sent us early in April specimens of a small slug which 
which he had found feeding upon plant-lice upon the leaves of Dock. 
We sent the slugs to Mr. W. G. Binney, Burlington, N. J., who de- 
termined the species as Limax campestris Binney, and stated that he 
had never known the species to feed in this way before. 
“Still,” he remarks, “slugs will eat almost anything that presents 
itself—vegetable matter usually, but in captivity they prey upon one 
another—will take sponge cake, strawberries, flour, lettuce, etc. The 
marginal teeth of their lingual membrane are aculeate. In the true 
carnivorous slugs all the teeth are such.” From this it appears that 
the instance observed by Mr. Webster was exceptional, and probably 
does not promise any particular benefit. 
THE TWIN-SCREW MOSQUITO. 
One of the best of recent newspaper hoaxes was that which appeared 
in the New York Sun early in March, concerning a new product of the 
New Jersey marshes, which it is proposed to dub the Twin-screw Mos- 
quito. Some hundreds of specimens of this creature were “ shot” by a 
party of hunters on the Hackensack Meadows. They are described as 
resembling two mosquitoes with the bodies united behind, thus giving 
a piercing apparatus to each end. A long, pseudo-technical deserip- 
tion, reputed to come from Prof. George Hume, of Jersey City, accom- 
panied the article, and a very good illustration of a male and female 
mesquito in copulation pictures the new terror. 
ECONOMIC ENTOMOLOGY IN NEW SOUTH WALES. 
The Agricultural Gazette of New South Wales for December, 1891, 
contains an excellent article upon the Plague Locust, by Mr. A.S. Olliff, 
and some entomological notes by the same author. Mr. Olliff attacks 
the locust problem from the standpoint of American writers, and gives 
a careful review of the work which has been done by the Entomological 
Commission of this country, adopting the recommendations of the com- 
mission, and urging thorough study of the permanent breeding grounds 
ot the Australian species. This plan would be quite in accordance 
with our own ideas, and the locust problem in Australia can receive ne 
intelligent treatment without a preliminary survey of this nature. The 
entomological notes include some consideration of the Spinning Mite or 
Red Spider of Australia, which is a species of Tetranychus allied to T. 
telarius, and an announcement of the fact that the Entomologist is 
about to begin the study of the Australian ticks. 
