eecoed of proceedings. 205 



Januaet 5th, 1878. — Biological Section. 



Four members present. 



Mr. Putnam exhibited some specimens of new bark louse, 

 probably a species of Aleurodes^ found on a hard maple {Ace?' 

 saceharamivi) in Peoria by Miss Emma A. Smith. 



Prof. Sheldon presented a tine series of hermit crabs {Eupag- 

 nus longicarpus^ Stimp.) from Chatham, Mass., in the shells 

 which they were inhabiting. 



January 11th, 1878. — Historical Section. 



J. A. (^randall in the chair. 



Thirteen members present. 



Mr. W. C. Putnam read a paper upon '' Old Fort Armstrong," 

 which embraced nearly all that is now known concerning that 

 important military post. The building of the Fort on Rock 

 Island in 1816, a complete description of its plan and appear- 

 ance, its earlier incidents and later history, together with its 

 abandonment in 1836, were successively described. From 1836 

 to 1865 the buildings went gradually to ruin, being superseded 

 at the latter date by the present Rock Island Arsenal. Much 

 of the material lor the article was gathered from the oldest 

 settlers. 



January 25th, 1878. — Regular Meeting. 



Rev. S. S. Hunting, President, in the chair. 



Forty-two members present. 



The donations to the Library and Museum were reported. 



The following persons were elected regular members : H. R. 

 Claussen, C. A. Ficke, Robert Krause, Francis Ochs, H. Lam- 

 bach, Jens Lorenzen, Dr. J. J. Ohlshausen, Mr. J. M. Parker 

 and Mrs. J. M. Parker — all of Davenport. The following per- 

 sons were elected corresponding members : W. W. Calkins, 

 Chicago, Ills. ; Otto Gunther, Worcester, Mass. ; Miss Alice 



[Proc. D. A. N. S. Vol. II.] 28 [May, 1878.] 



