1890.] NEW-YORK MICROSCOPICAL SOCIETY. 0;{ 



Mr. Haas discussed with several members of the Society some 

 of the merits and defects of the operation of the bent glass rods 

 of this lamp. 



Meeting of April 4Th, 1890. 



The President, Mr. P. H. Dudley, in the chair. 



Twenty-seven persons present. 



Mr. William G. De Witt, of the Committee on Purchase of 

 Objectives, reported that six low-power objectives had been 

 purchased for the use of the Society. 



The Corresponding Secretary read a communication from the 

 University of Toronto, requesting the donation of publications 

 for the refurnishing of the library of the University, lately 

 destroyed by fire. 



On motion of Mr. Charles F. Cox, the Publication Committee 

 was instructed to donate to the University of Toronto, a com- 

 plete set of the publications of the Society. 



President Dudley, at the request of the Society, repeated his 

 Paper of February 21st, 1890, on " The Termites of the Isthmus 

 of Panama." Mr. Dudley introduced some recent work of Mr. 

 J. Beaumont, of Colon, S. A., in connection with this subject, 

 and illustrated his Paper by a full collection of the insects, and 

 of specimens showing their operations. After the reading of 

 the Paper, numerous lantern projections were thrown upon the 

 screen, consisting of many photographic views taken from a 

 train while in motion across the Isthmus, and also of many 

 microscopical mounts of the Termites, prepared by Mr. L. 

 Riederer, as announced below. 



OBJECTS exhibited. 



1-9. Nympha of Tcnnes minimus. First form, showing nine 

 progressive states in the development continuously to the imago. 



10-12. Nympha of Vermes minimus. Second, or supplemen- 

 tary form. Showing three progressive states as above, the wing- 

 pads remaining rudimentary. 



13. Wing-pads of nympha of Eutermes. 



14. Wing-stumps of young queen of Eutermes. 



15. Rudimentary wings of supplementary queen of Termes 

 minimus. 



