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Psyche 4:253, 1883.

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PSYCHE.
PROCEEDINGS OF SOCIETIES,
CAMBRIDGE, MASS., JAN.-MAR. 1885.
Communications, exchanges and editors' copies should be addressed to EDITORS OF PSYCHE, Cam- bridge, Mass. Commitnications for publication in PSYCHE must be properly authenticated, and no anony- mons articles will bepublished.
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PERMANENT MOUNTING OF
TRACHEAE OF INSECTS.
I have succeeded in a very simple way in mounting permanently the tracheal system of insects. I dissect out the soft parts and spread them on a glass slide of the usual size ; let them dry perfectly; then with pen- cil-brush give them a good coating of collo- dion, after which I melt a little hard, pure balsam in a test tube and put it on the object with a cover glass applied at once. This is, so far as I know, a new method, It is re- markable for its results. The intestines, the ganglia, and the brain are perfectly magnifi- cent. The intestine makes thus one of the most beautiful objects for dark-ground illumi- nation. The brain shows the most abun-
dant ramifications of the trachea, especially in the immense parallel branches in the rods of the eyes. The ganglia can be floated on a cover glass, dried, and mounted in this way. The entire process is simple and easy, and gives the most satisfactory results. There are many points of histological in- terest in the brain which are thus demon- strated.
Lynn, Mass. F. T. Hazlewood.
ZOOLOGICAL SOCIETY 01; LONDON.
I ~ ~ U N E 1883.~. . . Prof. E. Ray Lankester. I?. R. S., read a memoir on the muscular and endoskeletal systems of Li~nztZus and - Sco?*$io.. . . These investigations seemed to confirm Prof. Lankester's previously ex- pressed views as to the near affinity of these two forms, hitherto usually referred to differ? ent classes of the animal kingdom, and to justify the association of Limulus with the arachnida.
18 DEC. 1883.~. . . Dr. F. Leuthner read an abstract of a memoir which he had pre- pared on the odonfoZabi?~i, a subfamily of the coleopterous family lucanidae, remarkable for the polymorphism of the n~ales, while the females remained very similar. The males were stated to exhibit four very distinct phases of the development in their mandibles, which the author proposed to term "prio- dont," "a~nphiodo~~t,""mesndont," and "telo- dont." These forms .were strongly marked in some species, but in others were connected by insensible gradations, and had been treated by the earlier authors as distinct species. The second part of the memoir contained a monograph of the three known genera which constitute the group odo~ztolabini.. . . Mr. J. Wood-Mason, F.Z.S., read a paper on the
embiidae, a little-known family of insects, on the structure and habits of which he had succeeded in making some investigations
during his recent residence in India. He came to the conclusion that the embitdae un- doubtedly belong to the true 01-thoptera, and are one of the lowest terms of a series formed by the familiar acridiodea, locustidae, grylli- dae, and flasmatidae.
I APRIL 1884.~. . .Mr. F. D. Godman,
F.R.S., read a paper containing an account of the lepidoptera collected by the late Mr. W. A. Forbes on the banks of the Lower
Niger, the rhopalocera being described by Messrs. F. D. Godman and 0. Salvin, and
the heterocera by Mr. H. Druce. The species



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