168 



Salycylic Acid as a Preservative. Having lately experimented 

 with salycylic acid as a preservative, I found that when about ten grains of 

 it are added to a quarter of a pound of brown glue, to be dissolved in water 

 for the purpose of gluing sheets of cork into insect-boxes, it is an excellent, 

 material to preserve, clarify and deodorize the glue. I also found the fol- 

 lowing useful for preserving delicately tissued invertebrates and larval 

 insects : Dissolve twenty grains of salycylic acid in two fluid ounces of 

 alcohol and add three ounces of water. — Curl F. Gissler, Brooklyn, N. Y., 

 Feb. 13, 1876. 



Proceedings of the Club. 



§ 10. Prothoracic Tubercles in Butterfly Caterpil- 

 lars. Mr. S. H. Scudder suggested that the extensible tuber 

 cle of the under surface of the first thoracic segment of most 

 butterfly caterpillars would probably prove homologous with the 

 osmateria (or more highly developed extensible tubercles of the 

 upper surface of the same segment) of the caterpillars of the 

 swallow-tail butterflies. Osmateria are found only and always 

 in the subfamily to which the swallow-tails belong; inferior 

 tubercles in all other butterfly caterpillars, but never in the 

 swallow-tails. Prepared caterpillars of all the principal groups 

 were exhibited in illustration. [See these Proceedings, § 3, 

 p. 64.] November 12, 1875. 



§ 11. Guadalupe Orthoptera and Butterflies. Mr. 

 S. H. Scudder exhibited the Orthoptera and Butterflies col- 

 lected in February and March, 1874, by Dr. Edward Palmer, 

 on the island of Guadalupe, off the coast of Lower California. 

 There were but four different kinds of Orthoptera ; one an 

 undescribed species of Gryllus with very short wings, most 

 nearly allied to 67. fjeruvianus Sauss., and probably indigenous, 

 the remainder Acrydii ; one an undetermined species of the 

 genus Acrydium of the American division Schistocerca ; the 

 others undescribed species of Trimerotropis, one of which is 

 also found in California and a very closely allied species in 

 Texas ; while the last, though probably not indigenous, has 

 not yet been recognized among the Orthoptera of the main 

 land. The only butterfly found upon the island, according to 

 Dr. Palmer, is Vanessa Carye, a species common to the west 

 coast of America from California to Peru. Nov. 12, 1875. 



No. 24 was issued April 14, 187fi. 



