ANATINJJ — THE DUCKS — C11AULELA8MUS. 



605 



lit tlie eggs 

 er's breast, 

 lie nest the 

 Moore took 

 . This was 

 lie forsakes 

 male bird, 

 10 nest. It 



irt of Oeto- 

 (1 fly aeross 

 light in the 

 ng. Those 

 latr.cl birds, 

 Mr. !Moore 

 were only a 

 md led the 

 ed mass of 



iTion bird in 

 th of grass, 

 i'dt many ot 

 his Duck to 

 ;his species, 



his species, 

 id feathers, 

 ■with down. 

 Liduboii was 

 le year. In 



once rare, 

 flehls ; and 

 Domestic 



ing larger 

 ibon, afford 

 ivas-back. 

 'J.'43 inches 

 he commou 



G. streperus; but this may very possibly be owing to a ilifferuiici! of age, us the type of Uuuesi is 

 iniuiaturc. 



U. Coucsi in very distinct, however, and much smaller, the measurements being us follows : 

 Wing, 8.20 inches J culmen, 1.40; width of bill, .55; depth at base, .UO ; tarsus, 1.40; middle 

 toe, 1.60.> 



ocu, 1801.) 



lerus, and the 

 Licific Ocean, 

 le coloration, 

 rsely spotted 

 dult male of 



C, strrperus. 



J Chaulelasmus Couksi, Streets. 



Chaulclusmus Cuuesi, Stuekts, Bull. Nutt. Orii. Club, I. no. 2, July, 187(3, 40 (Washington and 

 New Yolk islands, Funning Group) ; Bull. U. S. Nat. Mus. no. 7, 1877, 21 (do.). 



" Bill nearly iis long as the head, about as deep as broad at the base, dc[irt'ss('il anteriorly, sides nearly 

 parallel, but converging slightly toward the base, tij) rounded, and unguis abrujitly curved ; frontal angle 

 short and obtuse ; dorsal line at lirst sloping, rather more so than in C. slirpcrus, anterior portion broad, 

 straight, and flattened. Internal latnellie numerous, small, and closely packed, about seventy-five in num- 

 ber — in streperus only about fifty. Nostrils sub-basal, lateral, large, and oblong. 



"PluiiuKjc (immnlurc) : Head above dark brown, the featliers tipped with a lighter shade; frontal 

 feathers with the central ])ortion black, and edged with brownish white ; throat and sides of head brown- 

 ish white, shafts of the feathers brown, a small brown spot at the extremity of each ; lower jwrtion of 

 the neck and breast all around with the feathers marked with concentric bars of black and light reddish 

 brown ; under surface of the body white, each feathi^' with a broad dark band near the extremity, which 

 gives to this region a mottled aspect ; toward the tail the white of the abdomen assumes a dull reddish- 

 brown tinge ; the browiiisb-riMl color becomes more decided on the ilanks and siites of the body where 

 covered by the wings. On the back the plumage is more mature. Color dark brown marked transversely 

 by fine wavy lines of black and white ; scapulars dark brown and fringed with a narrow rim of reddish 

 brown. Middle wing-coverts chestnut ; greater, velvet black ; speculum pure white, the inner web of the 

 white feathers grayish brown ; in the third feather in the speculum, counting from within, the white gives 

 place to a hoary gray with a black outer margin ; the primaries light brown, the portion of both webs 

 nearest the shaft lighter ; shaft light brown. Tail contaiidng fourteen feathers, hoary iilumbeous gray, 

 under surface lighter and shining ; under tail-coverts crossed by transverse bars of black and whiter ; upjier 

 coverts composed of dark-brown and black feathers nungled. Under wing-coverts and axillars pure white. 

 Bill and feet black, .somewhat lighter on the inner side of the tarsus. Tibia bare for about half an inch. 

 Length, 17 inches ; wing, 8 ; tarsus, 1.40 ; commissure, ].6,'> ; culmen, 1.1." ; height an<l breadth of bill 

 at base, .55 ; average width of bill, .55 ; first toe, .30 ; second, 1.48, including claw, shorter than third 

 toe without claw ; third toe, 1.88, without claw, longer than outer toe without claw ; outer toe, 1.75. 



" A female is similar, but with little trace of the peculiar wing naukings, both the chestnut and black 

 being wanting, and the speculum being hoary gray instead of white. Both the specimens before mo are 

 immature ; the adults, it is presumed, will show the peculiar vermiculated appearance of C. slrejicrus. 

 They resemble the inunature condition of C. streperus so closely that one desciiption of the coloration 



VOL. I. — G4 



