Hagen.] 888 [November I, 



The prices are 3 thalers for the 4 1-2 inch, 7 thalers for the 2 3-10 

 and the 1 2-10 together. The others, together with a complete 

 stand, 21 thalers. An achromatic pocket lens made on a new plan 

 and magnifying 12 diameters, with 9-10 of an inch focal distance and 

 1-2 inch field is furnished for 3 thalers. 



Mr. P. S. Sprague announced that he had raised a hymen- 

 opterous parasite from the pupa of Pieris rapce, which Dr. 

 Packard had identified as Pteromalus puparum of Europe. 



Dr. Hagen presented to the Society a specimen of the 

 wingless Bittacus apterus Mc Lach., discovered in San Jose, 

 Cal., by Mr. Wm. Holden, and described in the Entomolo- 

 gist's Monthly Magazine for October, 1871. Dr. Hagen 

 stated that Mr. Holden had found a wingless Tipula in the 

 same region which bears a striking resemblance to the 

 Bittacus. 



Mr. F. G. Sanborn reported the recent capture of a spider, 

 of the genus Lycosa?, upon which was a parasitic larva ap- 

 parently dipterous. 



Dr. Hagen remarked that two species of Hymen optera 

 were known to be parasitic on spiders in Europe, but this 

 was the first account of a dipterous parasite on these animals. 



November 1, 1871. 



The President in the chair. Twenty-nine persons present. 



The President offered the following tribute to the late 

 Secretary of the Society, Rev. J. A. Swan, who died Octo- 

 ber 31, 1871. 



I know not how to utter the deep grief I feel and whicli 

 I know is shared by you all, in the death of our dear com- 

 panion, Mr. Swan, the Secretary of this Society. No one I 



