Entomological Society. 141 glandular bodies coexist ; the former I regard as the true salivary organs, the latter as veneniferous glands for the destruction of prey. In Nepa, Notonecta, Naucoris and Ranatra these bodies are beauti-fully developed. In pulmonary Arachnida the veneniferous glands are situated in the cephalothorax ; their excretorj' ducts arise from the anterior part of the gland and traverse a minute canal in the mandibles, and open at the perforated extremity of these organs. In Myriapoda, as in the preparation of Geophilus longicornis now before us, the veneniferous glands lie at the base of the mandibles among the striped or voluntarj-muscles that occupy this region. With an inch glass we see these organs most satisfactorily ; they consist of two oblong compact bodies composed of bundles of diaphanous cells closely pressed together and inclosed in a distinct capsule reposing loosely at the base of the jaws and occupying the hollow part of these organs ; from the anterior part of the gland rises a single ex-cretory duct, which passes forwards in an arched direction and enters a canal in the horny part of the perforated jaw and opens near its apex, as in the Arachnida. By this mechanism, when Geophilus in-serts its mandibles into the body of its victim, it at the same moment introduces a poison into the wound which destroys life, after the same principle as the parotid glands in some ophidian reptiles, as Crotalus, Naja and Vipera, are metamorphosed into veneniferous glands for the destruction of living prey. After this communication was made, Dr. Wright demonstrated the preparation to the members of the Club, and exhibited the singular structure with the aid of the microscope. ENTOMOLOGICAL SOCIETY. January 5th, 1846.— The Rev. F. W. Hope, F.R.S., President, in the Chair. Mr. Edward Doubleday exhibited a large web, of a delicate silken texture and four or five yards long, sent from Mexico, and intended for the collection of the Britiifh Museum, known by the name of the Tela de Maiz, spun by the caterpillars of some small Yponomeuta or Anacampsis over heaps of maize laid up in store. The President exhibited a portion of Mr. Fortnum's collection of insects formed at Adelaide in South Australia, with drawings of some of the more remarkable kinds, and announced that it was intended that a share of the duplicates should be placed in the collection of the Entomological Society. Mr. Bedell (who was present as a visitor) exhibited a specimen of Argyromiges Roborella of Zeller, a species new to Great Britain. A note was read by Mr. Brayley, accompanied by a species of Anthomyia (A. pluvialis, Linn.?), observed by a druggist to settle in great numbers on the filter when he was preparing tincture of cantharides, and at no other time. I'hey did not however come out of the cantharides. Extracts were read from letters addressed by Mr. Benson to Mr.