154 PROCEEDINGS OF THE ACADEMY OF [1892. 



This ssena? to be a very distinct species when compared with the 

 typical forms of the described Mexican Pachychili ; but these, like 

 all Melauians, are so variable that it is scarcely desirable to mul- 

 tiply species until fuller collections are made. It is here associated 

 with Lea's Melania polygonata because that species is the first 

 described of the particular group of forms to which the pi-esent 

 species or variety belongs. 



March 15. 

 The President, General Isaac J. Wistar, in the chair. 



Thirty-three persons present. 



A paper entitled "Greenland Lepidoptera," by Henry Skinner, 

 M. D., was presented for publication. 



The death of Dr. Sereno Watson, a correspondent, March 9, 

 aged sixty-six years having been announced, the following preamble 

 and resolutions received from the Botanical Section, were adopted : — 



Whereas — The Botanical Section of the Academy of Natural 

 Sciences of Philadelphia having learned with profound regret the 

 death of Dr. Sereno AVatson of Cambridge, Mass., and being desirous 

 of placing on record its sense of this great loss to Botanical Science 

 throughout the world : — 



Resolved — That we recognize the invaluable results of his 

 work in the dissemination of a knowledge of American Botany to 

 which he has given his undivided attention for many years, and 

 which has made his name famous wherever the study of plant life 

 is cultivated. 



Resolved — That a copy of this minute be forwarded to the 

 President of Harvard tlniversity and to the Gray Herbarium 

 at Cambridge with which he was so long associated, and that the 

 same be offered for publication in the Proceedings of the Academy. 



March 22. 

 The President, General Isaac J. Wistar, in the chair. 

 Thirty-eight persons present. 

 The deaths of the following members were announced : — 



Thomas Hockley, March 12, John McLaughlin, March 17, and 

 Andrew J. Parker, M. D., March 18. 



