Regular Meeting, June 15th, 1863.

Dr. Ayres in the Chair.

Six members present.

Donations to the Cabinet:

Insects from seeds imported from Germany, by Mr. Bevans; plants from Sonoma, by Dr. Behr.

Donations to the Library:

Annual Report of the Trustees of the Museum of Comparative Zoology for 1862. American Journal of Science for May, 1863, from the Editor.

Dr. Kellogg read the following paper:

Description of a New Species of Mentzelia.