1885.] NEW-YORK MICROSCOPICAL SOCIETY. 99 



walled tracheides, and a similar cavity of the thick-walled 

 tracheides. His observations form the opening article in this 

 Number of the Journal. Discussion added the following 

 matter : — 



Mr. Dudley : " The wood of a tree growing in an exposed 

 situation, has the firmer grain : its fibres are less easily separated 

 by flexure. I believe my specimens, notwithstanding their 

 differences, to belong to one species only." 



Dr. Britton : "Only one species of White Pine is found east 

 of the Mississippi, and no marked varieties of it are known to 

 botanists. The fact of its producing wood of different grain 

 under different conditions, has a parallel in the behavior of 

 the Liriodendron tiilipifera, or Tulip-tree, the wood of which is 

 sometimes nearly white, sometimes quite yellow ; and to wood- 

 men the tree is known accordingly as White Tulip Poplar or 

 Yellow Tulip Poplar. There is reason for referring this dif- 

 ference to diversity of soil." 



LIMITATION OF THE VISUAL FIELD OF THE WORKER HONEY- 

 BEE'S OCELLI. 



Mr. Zabriskie exhibited the head of the worker Honey-bee 

 for the purpose of directing attention to a peculiar disposition 

 of the abundant hairs surrounding the ocelli, these hairs ad- 

 mitting the light through narrow openings which greatly circum- 

 scribe the ocelli's visual field. He thought this arrangement to 

 indicate that the ocelli are intended for distant vision. At the 

 conclusion of his observations, — which are given in full else- 

 where in this Number of the Journal, — Mr, Zabriskie added : 

 " Besides the worker Honey-bee, I have brought for exhibition 

 the drone and the queen of the same species, and the queen- 

 cells ; the queen of Boinbiis Virginicus, one of our native 

 Humble-bees ; the Melissodes binotata, male and female ; the 

 Melissodes pnnnosa,hot\\ sexes ; the beautiful AnthopJwra dispar, 

 male and female, of Tunis, Africa ; and the celebrated little 

 stingless bee of Abyssinia, the Trigona Beccarii, which lives in 

 immense colonies, and stores large quantities of honey. The 

 AnthopJiora dispar has a Very long proboscis. The possession of 

 such a proboscis by our own bees, would add millions of dollars 

 annually to the wealth of the United States." 



