ddZ CALIFORNIA ACADEMY OF SCIENCES. 



Additions to Library: 



From correspondents 215 



By purchase 11 



By donation .... 6 



The following paper was read: 



The Economy of Nature as Exemplified by Vegetable and 

 Animal Parasites, by H. H. Behr. 



December 16, 1889. — Stated Meeting. 



The President in the chair. 



Additions to Museum: 



216 specimens of Insects, donated by E. C. McGregor. 



40 specimens wallow aphis (Lachnus dentatiis), donated 

 by G. P. Eixford. 



56 specimens of Insects, donated by E. F. Lorquin. 



5 specimens Ctenuchamultifavia, donated by C. D Haines. 



1 specimen of larval form of Anieles Mexicana; 204 speci- 

 mens of Lepidoptera, donated by H. H. Behr. 



90 specimens of Lepidoptera, donated by Carlos Troyer. 



I Spider (Lycosa), donated by Miss M. E. Parsons. 



8100 specimens of Insects, collected by the Lower Cali- 

 fornia Expedition. 



1300 species of European and Algerian plants, donated 

 by E. St. C. Cosson, Paris. 



300 species of Plants, donated by Department of Agri- 

 culture. 



600 species of Plants, donated by T. S. Brandegee. 



II specimens of Birds, donated by Boburt A. A. Wright. 

 4 specimens of Birds, from various donors. 



17 specimens of Birds, donated by L. Belding. 

 212 specimens Birds, 120 Mammals and 50 Eeptiles, col- 

 lected by the Lower California Expedition. 



