14 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



111., near the junction of Rock River and Mill Creek. He found 

 the following species : 



Hyalina arhorea^ Say. Pupa fallax^ Say. 



Hi/alma Tninusctda^ Binney. Pupa armifera^ Say. 



Hyalina lineata^ Say. Pupa contracta, Say. 



Helix striaiella^ Anthony. Succinea obliqua^ Say. 



Helix lahyrinthica^ Say. Segmentina armigera^ Say. 



Helix monodon^ Rackett. Planorhis hicarinatus^ Say. 

 Pomatiopsis lapidaria^ Say. 



Of these Helix striatella and Pupa armifera were not in- 

 serted by Mr. Pratt in his list of shells found in the vicinity of 

 Davenport (just printed), as he knew of no authentic recent 

 sj)ecimens being found, though they were both known to 

 occur as fossils in the loess of the bluffs. 



Prof. D. S. Sheldon exhibited a colored drawing of Thysania 

 zenohia Cram., made by Mr. C. V. Riley from a specimen which 

 Prof. Sheldon took on the roof of Griswold College in 1867. 

 This large and beautiful moth has never been taken in a region 

 so far north as this before, and is a remarkable instance of a 

 tropical insect being drifted north, probably with one of the 

 severe thunder storms which so frequently visit the Mississippi 

 Valley during early summer. The specimen from which this 

 drawing was made is preserved in the cabinet of Mr. Riley in 

 St. Louis. 



Mr. Putnam reported but few insects collected. There was 

 an unusual scarcity of all insects, and particularly of butterflies. 



May 16th, 1876. — Historical Section. 



J. A. Crandall in the chair. 



Five members present. 



W. C. Putnam, of the Committee on Organization, reported 

 a series of rules, which, with some amendments, were unani- 

 mously adopted, as follows : 



Standing Rules of the Historical Section. 



1. The name of this Section shall be the Historical Section of the 

 Davenport Academy of Natural Sciences. 



2. The object of this Section is the collection and recording for future 



