220 Proceedings 



sensoria of the sixth joint. 3. Circular Sensoria. more or less scattered 

 over the surface of the third and sometimes also on the fourth and 

 fifth joints. The circular sensoria show considerable variation in the 

 different genera, and may be transverse, annulate, tuberculate, etc. 



The hairs of the antennae are also undoubtedly sense organs, of 

 which several different forms may be distinguished: 1. A group of 

 short spine-like hairs on the apex of the spur, (the narrow prolongation 

 of the sixth joint). 2. Hairs scattered over the surface of the an- 

 tennae, long and slender in Lachnus Chaitophorus, etc.; short and spine- 

 like in Aphis; club-shaped in Nectarophora. 



A Mineral Resembling Meerschaum, from the Serpentine 

 Range of Hampden County, Mass., by A. D. Roe. [See paper 



J.] 



The Sugar Beet Industry at St. Louis Park, by C. C. 



Hafer. 



243d Meeting, April 4, 1899. 



Eleven present ; President MacDougal in the chair. 



John Skinner elected to membership. 



A committee, Dr. J. K. Hosmer, Dr. F. W. Sardeson, and 

 A. D. Roe, was appointed to consider paying a curator of the 

 Academy museum. 



The President reported informally on the proposition of 

 the Omaha Exposition corporation for the mounting, exhibi- 

 tion, and subsequent return to the Academy at this city of 

 the Menage Philippine Expedition material stored at the 

 State University buildings. 



Brief papers were read by Dr. F. W. Sardeson and Dr. 

 U. S. Grant. 



244th Meeting, October 3, 1899. 



President Oestlund in the chair. 



Ten persons present. 



The disposition of the collections of the ]\Ienage Expedi- 

 tion to the Philippine Islands on their return from Omaha, 

 was considered. A committee was appointed, consisting of 

 Messrs. Roe, Winchell and Burchard. 



The following program of papers was presented : 



A Theory of the Origin of Copper in the Lake Superior 

 district, by C. P. Berkey. 



River Collecting of Zoological Material, by J. E. Guthrie. 



