210 



The Tewksbuiy plant has the characteristics of a greenhouse growth, 

 differing from the common European forms of the wild plant in points 

 which are likely to be affected by cultivation. 



The doubts thus awakened as to any mention of the plant by De la 

 Pylaie ; the absence of any single, authentic specimen of the plant ever 

 collected in America ; and the peculiar appearance of the Tewksbury 

 growth, added to the evidence adduced in my former article, all lead 

 to the conviction that the Calluna vulgaris is not indigenous to the 

 United States, nor to Northern America. 



The Secretary read a paper by Mi\ A. S, Packard, Jr., on 

 Synthetic Types in Insects, 



Mr. S. H. Scudder made some remarks upon the structure 

 of the head in hexa23od insects. He mentioned some of the 

 difficulties which beset the investigator, and showed that the 

 law of centrifugal development exhibited in the thorax of 

 insects, in their growth from larva to imago, was illustrated 

 during the development of the head, not in tlie sub-division 

 of the rings of which it is composed, but in the tri-partition 

 of the appendages borne upon the lower portion of the 

 rings. 



The following letters Avere read, which had been recently 

 received, viz. : — 



From the Secretary of the Trustees of the New York State Li- 

 brary, Albany, Feb. 17th, 1863, and the Buffalo Society of Natural 

 Sciences, February 18th, 1863, acknowledging the receipt of the pub- 

 lications of the Society ; the Botanical Society of Canada acknowledg- 

 ing the same, and asking for certain numbers in addition. From 

 Thomas Macfarlane, Esq., Acton Vale, Canada East, February 9th, 

 1863, and G. A. Boardman, Esq., Milltown, Maine, February 18th, 

 1863, acknowledging their election as Corresponding Members ; 

 and from Benjamin D. Walsh, Esq., Rock Island, 111., acknowledging 

 the same, and presenting some of his Entomological papers. 



Mr. Samuel R. Carter, of Paris Hill, Maine, was elected 

 Corresponding Member. 



