1889.] NEW-YORK MICROSCOPICAL SOCIETY. 59 



bottom. Neither the queen nor her cell was found. ^ 



Calotermes inarg;inipennis (.?) seems to be a very aristocratic 

 species, and has only been found in the ash door-posts of first- 

 class coaches, which were in daily service. Nothing indicating 

 a nest has been found. The wood is eaten out, after gaining 

 access to the interior of the post, but not re-filled, as is often 

 the case with species of Tennes. 



The three other species from the Isthmus have nasuti 

 soldiers, or those with beaks, which in this Paper will be called 

 Eutermes. 



Many nests and queens have been obtained of these, which 

 are very abundant upon the Isthmus. Small portions of several 

 nests showing the cell-structure, and especially the queen-cells, 

 are before you. The cells, and, in many cases, the ])assages in 

 the nest are very irregular, and seem intended more to give 

 strength to the surrounding structure than regularity of passage. 

 The walls at first are thin, but are thickened by accretions as 

 the nest becomes older and larger. The nests which I saw 

 were attached to small trees, from four to ten feet above the 

 ground. Others were reported to me which were from fifty to 

 sixty feet from the ground. The nests which I saw were from 

 ten to thirty inches in diameter, and looked like large excres- 

 cences upon the trees. Some of them were pear-shaped, others 

 were globular, excepting on the side of attachment. On a 

 small tree, not over two or three inches in diameter, the nest 

 was usually symmetrical. The cells in the nest were covered by 

 a thin layer of the same material as that forming the nest, hav- 

 ing very minute raised apertures, preventing the ingress of rain, 

 but allowing ventilation. The entrance and exit to the nests 

 were by covered galleries, one gallery often serving for both 

 entrance and exit. 



The system of galleries of the Termites, especially of Euter- 

 mes, forms a conspicuous and important feature of these struc- 

 tures upon the Isthmus. The galleries extend from the nest to 

 places where food can be obtained, or more properly to some 

 wood to be eaten. Some of these galleries extend two hundred 

 feet from the parent nest, and through them the lines of workers 



* Advices, of January 14th, 18K9, state that the uest, after being cut down upon 

 one side, was aliandoned by the ocoiipauts, and all trace of them was lost. A second 

 mud nest three and one-half feet in diameter and of the same height, has been found 

 at Corozal station, three miles from Panama. 



