July, 1S43, 283 



MEETING FOR BUSINESS, July 25, 1843. 



Vice President Morton in the Chair. 



The Report of the Corresponding Secretary was read and 

 adopted. 



The Committee to whom was referred the following paper, 

 reported in favor of its publication in the Proceedings of the 

 Academy. 



Descriptions of two Species, supposed to be new, of the Genus Tyrannula 

 Swainson, found in Cumberland County, Pennsylvania. By William M. 

 & Spencer F. Baird, of Carlisle, Pa. 



For the first of the species hereafter described, we propose the name of 

 Tyrannula flaviventris, the bright yellow colour of the lower parts constitut- 

 ing a striking feature. The other we have named Tyrannula minima, it 

 being the least of all our North American Tyrannulse. 



The similarity in colour and size between a number of our small tyrant 

 fly-catchers being very great, we have deemed it best to send with the 

 specimens of the two described, skins of T. acadica, and S. Traillii, spe- 

 cies which most nearly resemble them. By a comparison of the four, the 

 distinctive features of each will at once be perceived. 



Tyrannula flaviventris, (nob.) 

 Specific Characters. Above deep greenish olive, beneath bright sulphur 

 yellow, sides and fore part of breast olivaceous. Tail emarginate. Third 

 and fourth primaries longest. Bill brownish yellow beneath. 



Description of a Male. 



Form, $rc. Body rather stout. Bill broad and the sides convex. Tarsus 

 longer than the middle toe. Wings rounded ; third primary longest, fourth 

 slightly shorter, second one line shorter than third, and two lines longer 

 than fifth, first shorter than fifth, but longer than sixth. Tail emarginate 

 and slightly rounded. 



Colour. Bill above dark blackish brown, beneath light yellowish brown: 

 Feet brownish black. Plumage of the upper parts deep greenish olive, 

 crown of the head rather darker, the feathers having their centres dark 

 brown. A narrow ring round the eye pale yellow. Lower tail coverts, 

 abdomen, and linings of the wings, bright sulphur yellow, deepest on the 



