Brigham.] 164 [December 2, 



place of the ordinary head of the imago, it bore the head of 

 the caterpiUar. Three other instances of a similar nature 

 were cited by Dr. Hagen ; one })y Miiller, in Dicranxda 

 vinula of Europe ; another by Wesmael, in J^ymphaUs pop- 

 tdi of Europe; the third by Frederic Smith, in Cybister 

 limbatus from Hong Kong; in all of these instances the in- 

 sects were taken alive ; the specimen exhibited by Dr. Hagen 

 was quite fresh and unbroken. 



Dr. E. P. Colby exhibited a specimen of J^ryaxis luniger 

 Lee. He had repeatedly taken this insect under stones on 

 the seashore, which were covered by water to the depth of 

 sevei'al feet at every high tide ; they must have undergone 

 repeated immersions from two to three hours in length. 



December 2, 1868. 

 The President in the chair. Forty-six members present. 



Mr. William T. Brigham presented a pajier entitled : — 

 Xotes on Alsinidendron, Platydesma and Brighamia, new 

 genera of Hawaiian Plants, by Horace Mann. 



The first of these new genera belongs to the family of Caryophyl- 

 lacefe, and is a small shrub found on the Kaiila Mountains on the 

 Island of Oiihu, at an elevation of about two thousand feet. Platy- 

 desma belongs to the Rutacese, and is a small tree, the leaves of Avhich 

 often attain the length of fifteen inches, found on the Konahuanui 

 Ridge of the same island. The third is a curious genus of Lobelia- 

 cea3, discovered by Mr. Brigham on the island of Molokai, and 

 described by Dr. Asa Gray. 



This paper will be published in full in the ^Memoirs of the Society 

 (Vol. I, Pt. iv), and will be illustrated by three plates. 



