782 



U. S. p. E. E. EXP. AND SUEVETS — ZOOLOGY — GENERAL REPORT. 



Female with the wing similar, but with the blue of coverts and scapulars less distinct Head and neck brownish yellow, 

 spotted with dusky ; the belly with a decided chestnut tinge. 

 Length, 20.00 ; wing, 9.50 ; tarsus, 1.38 ; commissure, 3.02. 

 Hob. — Continent of North America ; abundant in Europe. 



List of specimens. 



CHAULELA.SMUS, Gray. 



Chauliodm, Sw. P. Bor. Am. 1831. Not of Bloch, 1801 . 

 Chauliodes, Etton, Mon. Anat. 1838. Not of Latreille, 1798. 

 Chaulela^ms, G. R. Gray, 1838. Type ./Jnos strepera, L. 



The characters of this genus have been sufficiently indicated in the synopsis, on page 772. 

 The diagnosis of the single species is as follows : 



Head spotted ; lower throat, jugulum, hack, and sides of body handed black and white ; rump 

 and tail coverts black ; middle wing coverts chestnut, succeeded by black internally ; speculum 

 white, bordered externally by black G. streperus. 



CHAULELASMUS STREPEEUS, Gray. 



Gadwall ; Grey Duck. 



^nas strepera, Linn. Syst. Nat., I, 1766, 200.— Gmelin, I, 520.— Lath., Ind. II, 1790, 849.— Wilson, Am. Cm. 



VIII, 1814, 120 ; pi. Ixxi.— Bon. Obs. 1825, No. 257.— Add. Orn. Biog. IV, 1838, 353 ; pi. 348 



Ie. Syn. 378.— Ib. Birds Amer. VI, 1843, 254 ; pl. 388.— Temminck, Man. II, 838. (European.) 



Jnas {Chauliodm) strepera, Swainson, F. Bor. Am. II, 1831, 440. 



Anas {Boschas) strepera, Ndtt. Man. II, 1834, 383. 



Ktinorhynchus strepera, Eyton, Mon. Anat. 1838, 137. 



Gadwall, or Gray, Pennant, II, 575. — Latham. 



" Chaulelasmus streperus, Gray, 1838." Gray. 



Sp. Ch. — Male. Head and neck brownish white, each feather spotted with dusky ; the top of head tinged with reddish. 

 Lower part of neck, with fore part of breast and back, blackish, with concentric narrow bars of white, giving a scaled appearance 

 to the feathers. Interscapular region, outermost scapulars, and sides of the body finely waved transversely with black and 

 white. Middle wing coverts chestnut, the greater velvet black, succeeded by a pure white speculum, bordered externally by 

 hoary gray, succeeded by black ; crissum and upper tail coverts black . Longest tertials hoary plumbeeus gray . "Innermost 

 scapulars with a reddish tinge. Inside of wing and axillars pure v/hite. Bill black. 



Female with the bill dusky, edged with reddish. Wing somewhat like that of the male, but with the chestnut red more restricted. 



Length, 22; wing, 10.50; tarsus, 1.64; commissure, 2.04. 



Hab. — North America generally, and Europe. 



