187 [Scudder. 



water side in the Potsdam sandstone ; sometimes, however, 

 the sides were equal. 



The Corresponding Secretary read the following list of 

 letters : — 



From the Albany Institute, June 7tb, 1865; the Naturhistorlsclier 

 Verein der preussischen Rheinlande und Westphalens, and theMittel- 

 rheinischer geologischer Verein, Darmstadt, August 24th, 1865; 

 the India Museum, and the Literary and Historical Society of Que- 

 bec, September 16th, 1865, acknowledging the receipt of the Society's 

 publications; the Real Academia de Ciencias, Madrid, July 13th, and 

 August 24th, 1865, acknowledging the same and presenting their own 

 pubUcations; the Naturhistorische GescUschaft zu Hannover, July 

 15th, 1865; the Museo publico de Buenos Aires, the Societe Impe- 

 riale de Geographic a St. Petersbourg, the Societe Linneenne de 

 Lyon, the R. Istituto Tecnico di Palermo, August 24th, 1865, pre- 

 senting their pubUcations. 



The following paper was read : 



Notes upon some Odoxata from the Isle of Pines. By 

 Samuel H. Scuddek. 



The Isle of Pines, where the Insects were obtained, which form the 

 basis of the following notes, is, zoologically speaking, a portion of 

 Cuba, though differing from It, or at least from those portions of it 

 with which It is In geographical contiguity, by very marked physical 

 features. I believe that a few insects have been found there, which 

 have not yet been discovered in Cuba, but probably a more careful 

 search will bring them to hght. The island is about twenty-five miles 

 In diameter, its nearest point fifty miles distant from Cuba, (a 

 distance broken moreover by a series of keys stretching in a north- 

 westwardly direction) and is in the longitude and jurisdiction of Ha- 

 vana. The climate is milder, but much more equable than that of the 

 contiguous parts of Cuba. 



The Odonata mentioned In the following pages were obtained at 

 Sante Fe, on May 10th and 13th, with the exception of one or two 

 which were taken in Cuba at an earher date, but which became 

 mingled in my collection, so that I was not able to distinguish them; 

 the notes have reference particularly to the colors of the living insects. 

 I am indebted to Mr. P. R. Uhler for some valuable hints upon the 

 generic relations of some of the species mentioned. 



