xxxiv Trans. Acad. Sci. of St. Louis. 



Libraeian's Report. 



The Librarian reported that the accessions to the library for the 

 year 1911 by exchange with 114 home and 301 foreign societies 

 amounted to 634 volumes and 126 pamphlets, and by donation 78 vol- 

 umes and 80 pamphlets. 



The Transactions for the year were sent to 114 home and 301 

 foreign societies. 



Curator's Report. 



The Curators reported that during the year donations were received 

 from: 



Dr. Adolf Alt, a fine specimen of Haliotis tulerculata from Cali- 

 fornia. 



Report of the Entomological Section. 



Tuxedo Park, Dec. 31, 1911. 

 To The Academy of Science of St. Louis: 



The Entomological Section has held five meetings during the year 

 1911. 



The papers presented at these meetings were as follows: 



Professor J. F. Abbott — ^An examination of Poulton's Theory of 

 Mimicry. 



Hermann Schwarz — A collecting trip through St. Louis and .Jeffer- 

 son Counties, Missouri. 



Ernst Schwarz— The genus Catocala. 



Philip Rau — Sexual selection in the Cecropia moth. 



J. T. Monell — Abnormal Aphids. 



The average attendance at these meetings was five members and 

 Blx visitors. 



Respectfully submitted, 



(Signed) Hermann Schwarz, 



Secretary. 



