academy of sciences. 117 



Regular Meeting, March 21st, 1870. 

 President in the Chair. 



Dr. Wm. P. Gibbons, of Alameda, and S. H. Herring were 

 elected resident members. 



Donation to the Museum : 



Dr. H. Gibbons, Jr., presented a piece of Oregon fir and a larva 

 of a beetle, probably Ergates spicidatus, that had bored several in- 

 ches in the wood. 



Donations to the Library : 



On Lepetidaj, W. H. Dall, Philad, 1870, patn. 8vo.; Ann. de la Soc. p]u- 

 teraologique Beige, vols. 1 to 12, 1857-1868, 12 vols., 8vo.: Aun. de la Soc. 

 Malacologique de Belgique, vols. 1 to 3,1863-68, 3 vols., 8vo.; 43 Pamphlets, 

 by the Baron de Selys Lougchamps, on Phenom. Period, de la Rogue animal, 

 4to.; Mammifercs du Brabant, 4to.; Micromamalogie, Paris, 1839, 8vo.; Cal- 

 giidrier de Faune en Belgique, 1852, 1854; Animaux utiles a I'agriculture, 1866; 

 Faune Beige, 1st part, 1842; Hybrides anatinees, 1856 ; Oiseaux Americaines 

 admis dans la faune de 1' Europe ; Catalogue des Oiseaux de 1' Europe; 16 

 others on mammals, birds and fishes, with 14 on insects and note on Populus 

 raonilifera, by the same author ; De la class des Fougeres, J. E. Bommer, Paris, 

 1869, 1 vol., 8vo.; Les Platanes et leur culture, by same, Brussels, 1869, 1 vol., 

 8vo.; Instructions pour recueillir Mollusques par Dr. J. Lewis, Mohawk, N. 

 Y., traduit par J. L. Weyers, Brussels, pam. 8vo. 



Dr. Cooper made extracts from a paper of Baron de Selys Long- 

 champs on hybrids occurring naturally among various wild birds of 

 the family Anatidce. He also stated that instances were lately 

 published in the "Ann. de la Soc. Mai. de Belgique" of snails reviv- 

 ing after a torpidity of ten years in a cabinet ; and also that Mr. 

 Gabb had found the eggs of Limax Coliimhianus to hatch after 

 being kept in a box three years. 



Dr. Blake read the following abstract of a paper from the French 

 of M. Gintrac, -of the Academv of Sciences of Paris : 



On account of the disease prevalent amongst the silkworms in France, many 

 experiments have been made in order to discover the best means of rearing 

 them. The results obtained by M. Gintrac, and which were communicated to 

 the Academy of Sciences in Paris in September, seem to contain facts which 

 may be useful for the sericulturists of this State. This observer found that silk- 

 worms succeeded much better when raised in the open air than when kept in 



