236 [Oct. 



the color to the glandular bodies. The reservoir also is lined with cells. In Upis 

 Pennsylvanica they are biownish, or nearly colourless, measure the l-7C0th inch 

 in diameter, contain sonie finely granular brownish matter, ami a large round or 

 oval, translucent, faintly granular nucleus,, measuring l-1200th inch, with a large, 

 round or oval nucleolus l-2727th inch in diameter. 



The secretion of the glands of Julus marginatum, contained within the interior 

 of the body, is deep yellow in color, and contains a few of the purplish granules 

 of the celU. It resembles oil in consistence, but is soluble in water and alcohol. 

 It is neither acid or alkaline, evaporates at a temperature of S.'iOo F., without 

 residue ; is acrid to the tongue, Schiieiderian membrane, and conjunctiva, smells 

 like iodohydric acid, and stains the cuticle brown. The last two properties led 

 me to suspect the existence of iodine, but the usual reagents presented none. It 

 probably belongs to a class of peculiar organic compounds, found in the odorifer- 

 ous principles of animals, not yet investigated. 



Exteriorly the reservoirs of the odoriferous glands of insects are furnished with 

 transverse mu?;cular bands, of a brownish color, about 1-I578th inch in breadth, 

 and separated by wide intervals. 



In Julus, the body of the glands possesses no distinct muscular bands, but the 

 neck is provided with them. 



References to the plate. 



Fig. 1. Represents one of the odoriferous glands of Julus niarginatHS, much 

 magnified, exhibiting the secreting cells on the interior surface of the body, and 

 the muscular bands of the neck. 



Fig. 2. Represents some of the secreting cells, lii'^lily magnified, a. cells in 

 which the nucleus is concealed from tlie quantity of granular matter; b, nucleus; 

 <•. cells in outline. 



Fig. 3. Three secreting cells very highly magnified, a. nucleus concealed by 

 granular contents ; /;. a cell burst with a portion of the contents escaping. 



October aO/A. 



Dr. Bridges in the Chair. 



The Committee on Mr. (.'assiti's descriptions of new species of Capri- 

 mulgidjE. reported in favor of publication in the Proceedings. 



Descriptinns of iieir.< speries of Lird.i of the I'amili/ Cajirimiilf^iilsc, xpfcimeris of 



vjldch are iti the Collectiou of the Acadrmy of Natural Sciences of Phila- 



delj'hia. 



By John C.\ssin. 

 Genus Hydropsalis, Wagler, Isis 1832, page 1222. 



1. Ilydropsalis limhatits, nobis. 



Adult 5 • ?• Form. Wings long, pointed, with the shafts of the primaries 

 strong and slightly curved ; first primary longest, second and third deeply 

 sinuatrd on their outer webs, and, with the first, having their external margins 

 distinctly serrated. Tail excessively long, graduated, the two external feathers 

 surpassing the next by about 14 inches; others regularly receding to the two in 

 the middle; which an shortest. Tarsi feathered slightly below the knee. Webs 

 of outer tail feathers narrow. 



