236 Entomological Society. 



ihorhynchus, and then enters at considerable length into its anatomy. 

 The stomach is nearly as large in an individual four inches in length 

 as in the adult animal. In this specimen it was found filled with 

 coagulated milk, and no trace was visible, on the most careful exa- 

 mination, of worms or bread, on which, up to the time of his dis- 

 covery of the mammary secretion, Lieut, the Hon. Lauderdale Maule 

 had believed that this individual had been sustained. A portion of 

 this coagulated substance was diluted with water, and examined un- 

 der a high magnifying power in comparison with a portion of cow's 

 milk coagulated by spirit, and similarly diluted. The ultimate glo- 

 bules of the Ornithorhynchus' s milk were most distinctly perceptible, 

 detaching themselves from the small coherent masses to form new 

 groups : the corresponding globules of the cow's milk were of larger 

 size. Minute transparent globules of oil were intermixed with the 

 milk globules of the Ornithorhynchus. A drop of water being added 

 to a little mucus, it instantly became opake j and its minutest divi- 

 sions, under the microscope, were into transparent angular flakes, en- 

 tirely different from the regularly formed granules of the milk of the 

 Ornithorhynchus. 



In passing in review the several viscera of the young Ornithorhyn- 

 chus, Mr. Owen observed on various physiological deductions which 

 might be drawn from them, and on the differences and resemblances 

 borne by them to the same organs in the ordinary viviparous Mam- 

 malia and in the Marsupiata*. 



ENTOMOLOGICAL SOCIETYf. 



June 2.— Numerous donations of books and insects were an- 

 nounced. A prospectus of Prize Essays, on the subject of noxious 

 insects, and remedies for their destruction, proposed by the Society, 

 was read, offering the sum of five guineas annually for the best 

 essay. The subject of that for the present year to be the Turnep-fly . 



Papers were read upon the Sphinx ephemceriformis, by J. F. 

 Stephens, Esq. ; Descriptions of various larvae of Coleoptera, by 

 Mr. G. R. Waterhouse j Upon the habits of Odynerus Antilope, by 

 Mr. Westwood ; Descriptions of the Irish Species of Thysanura, by 

 Mr. Templeton. Mr. Spence alluded to the annoyance caused to 

 the inhabitants of Brighton and some parts of London by the 

 swarms of a minute ant, which had infested houses, occasionally to 

 such a degree that the inhabitants were compelled to quit them. 



July 7. — A report was read of the purchases of insects made at 

 the sale of the late Mr. Haworth's collections. 



Papers were read upon the British species of Dromius, by C. C. 

 Babington, Esq., M.A.; Upon a new British genus "of Neuroptera 

 and family Hemerobiidce, by J. O. Westwood, F.L.S. ; Description 

 of a new genus of Curculionidce , from St. Helena, by M. Chevrolat 

 of Paris; Upon the British genera Acentria, Acentropus, and Zancle, 

 by Mr. Westwood j and the conclusion of Mr. Templeton's Thy- 

 sanura Hibernica. 



* Other notices relative to the Monolrcmata and their affinities will be 

 found referred to in our last Number, p. 147. 

 t Continued from vol. iv. p. 385. 



