BIKUS OK NORTH AND MIDDLE AMERICA. 483 



on the lower rump; wings and tail duskj^ grayish brown, the feathers 

 with distinct lighter margins (very narrow, and pale olive-gray on the 

 primaries), the middle and greater coverts tipped with dull buff, form- 

 ing two fairly distinct bands; a superciliary stripe (disappearing 

 above the ear-covorts), and general color of under parts pale yellowish 

 buff, shaded with brownish along the sides and flanks, where obsoletely 

 streaked (most distinctly on flanks) with dusky olivaceous; under wing- 

 coverts white, tinged, especially along edge of wing, with pale cream- 

 yellow; maxilla light cinnamon with dusky tip; mandible very pale 

 brownish buffy; "iris dark brown;" legs and feet blackish brown; 

 length (skin), 109.22; wing, 63.60; tail, 38.10; culmen, 13.46; gonys, 

 7.37; width of mandible at base, 7.37; tarsus, 20.83; middle toe, 14.48.* 

 Galapagos Archipelago (James and Duncan Islands). 



Camarhynchus incertus Ridgway, Proc. CJ. S. Nat. Mus., xviii, no. 1067, Apr. 23, 

 1896, 294 (.Tames I., Galapagos Archipelago; collection of Dr. G. Baur); 

 xix, 1897,560 (monogr.). 



Oeospiza incerta Rothschild and Haetert, Novit. ZooL, vi, Aug., 1899, 168 

 (James and Duncan islands; erit. ). 



CAMARHYNCHUS PAUPER Ridgway. 

 SHALL-BILLED GROUND FINCH, 



Similar to C psittaoul'us and allies, but with the bill very much more 

 slender; similar to C^rosthemelas, but much larger. 



Adult male. — Pileum and hindneck dull blackish brown, indis- 

 tinctly streaked with grayish olive; sides of head nearly plain grayish 

 olive, more dusky on cheeks; throat and chest dull black, broken by 

 occasional streaks of pale olive-buff, this color predominating on chin; 

 rest of under parts very pale olive-buff, inclining to white, the whole 

 breast broadly streaked with blackish, these streaks continuBd back- 

 ward over sides to flanks, both the latter being light buffy olive later- 

 allj; under tail-coverts decided pale buff; upper parts olive, lighter 

 on rump, the feathers of the dorsal tract much darker centrally, form- 

 ing very broad but rather indistinct dusky streaks; bill entirelj'^ deep 

 black; legs and feet brownish black; length (skins), about 114.30- 

 127.00; wing, 71.12-72.39 (71.88); tail, 43.18- 3.94 (43.56); culmen, 

 14.73; gonys, 7.37-7.62 (7.49); width of mandible at base, 7.62; depth 

 of bill at base, 9.40; tarsus, 23.11; middle toe, 15.24-16.00 (15.62).' 



^Type, no. 521, Baur coll. (Tring Museum) , James Island, Galapagos, Aug. 13, 1891. 



The bird described above is absolutely similar in coloration to C. salvim, of Chatham 

 Island, but is nearly as large as C. compresdrostris. Were these two species found 

 together on the same island, I would be disposed to consider the present bird a 

 hybrid; but manifestly this can not be the case. It is possible that a larger series of 

 specimens would run C. compressirostris and C. incertus together, in which case there 

 would be another form common to the two islands of James and Jervis; but for the 

 present I have to consider them as different. 



^ Two specimens. 



