Regular Meeting, March 7th, 1864.

President in the Chair.

Present twelve members; also Messrs. Turnbull, Smith, Gardiner, and Burgner, by invitation.

Donation to the Cabinet: Stuffed skin of a large venomous Snake, from the Sierra Madre of Mexico, east of Mazatlan, presented by Mr. Burgner.

Donations to the Library: Pamphlets on the North American Helicidæ, by Thomas Bland, extracted from the Annals of the N. Y. Lyceum of Natural History. American Journal of Science and Arts for January, 1864. Boston Journal of Natural History, Vol. VII, No. 4.

Dr. Behr presented the following paper:

On Californian Lepidoptera. No. IV.

BY H. BEHR, M.D.