clxxi 



May 17, 1875. 

 W. T. Harris, President, in the chair. 



Fifteen members present. 



Minutes of previous meetings read and approved. 



The Corresponding Secretary read several letters and commu- 

 nications. He stated that he had received the following works : 

 From the Secretary of the Interior — Hayden's 7th Ann. Rep. of 

 the Geological Survey of the Territories ; Coues' Birds of the 

 Northwest; Lesquereux's Cretaceous Fauna; Leidy's Extinct 

 Vertebrate Fauna ; Thomas's Synopsis of Acrididae ; Porter and 

 Coulter's Flora of Colorado. From the Royal Academy of Sci- 

 ences, Berlin — a copy of their Proceedings. A Memoir on the 

 Antiquity of Caverns and Cavern Life of the Ohio Valley, by 

 Prof. Shaler, Boston ; Herbert Spencer's "Illustrated Sociology," 

 from Mr. Ward Combs, of Fieldon, Ills. ; Proceedings of the Aca- 

 demy of Sciences, Konigsberg. Also a work by Gustav Wen, 

 "Ueber die Wasserabnahme in den Quellen, Fliissen und Stro- 

 men bei gleichzeitiger Steiger ungder Hochwasser in den Cultur- 

 landern," accompanied by a circular asking for facts relative to 

 the same subject in this part of the world. 



Nos. 1 and 2 of vol. iii. of the Transactions were ordered to be 

 sent to Mr. W. W. Caulkins in return for his work on Fresh- 

 water Shells. 



Dr. Richardson read a brief paper on the appearance of four 

 rainbows. 



Dr. Stevens presented to the Academy a number of crinoids, 

 trilobites, and orthocerata, obtained from the Grafton stone quar- 

 ries in Illinois. He reported that specimens were quite numerous 

 in that rock. 



Mr. Riley referred to the ravages of the young locusts in the 

 western counties of the State as truly alarming. He said, how- 

 ever, that he did not apprehend that they would do any serious 

 damage outside of the districts in which they had hatched ; that 

 the bulk of them would get wings by or before the middle of June 

 to enable them to fly away, which they would do. He predicted 

 that they would this season return to the northwest ; that very 

 few eggs would be deposited in Missouri this year, and that, con- 

 sequently, there would be no injury from the pests in 1876. He 



