k 



NO. 1116. PBOCEEDIXGS OF THE NATIOXAL MUSEUM. 519 



One adult male, an immature male, and an immature female are in 

 Dr. Baur's collection. 



This form approaches G. strcnua in the size and form of the beak, 

 but the gap between them is very considerable. The bill is also pro- 

 l)ortionally much more compressed than in G. strenua. 



GEOSPIZA DUBIA, Gould. 

 . (Plate LVII, tig. 11.) 



Geospiza diihia, Gould, Proc. Zool. Soc, Pt. v, 1837, p. 6 (Cialapagos Islands) ; Zool. 

 Voy. Beagle, III, Birds, 1811, p. 103 (Chatbam Island).— Boxai'arte, Consp. 

 Av., 1, 1850, p. 543.— Gray, Hand-1., II, 1870, p. 88.— Salvin, Trans. Zool. Soc, 

 IX, Pt. IX, 1876, p. 480 (Chatham Island).- Sharpe, Cat. Birds Brit. Mus., 

 XII, 1888, p. 9 (Chatham Island). 



Geospiza fortis (part), Gould, Zool. Voy. Beagle, III, Birds, 1841, p. 101 (Chat- 

 ham Island).— RiDGWAY, Proc. U. S. Nat. Mus., XII, 1889, p. 107 (Chatham 

 Island). 



Geospiza nebulosa (nee Gould), Sundevall, Proc. Zool. Soc, 1871, p. 125 (part) 

 (Chatham Island).— Salvin, Trans. Zool. Soc, IX, Pt. ix, 1876, p. 482 

 (Chatham Island).- Sharpe, Cat. Birds Brit. Miis., XII, 1888, p. 11 (part). 



Specific characters. — Similar to G. fortis, Gould, but larger, with 

 relatively larger and more turgid bill. Wing, 2.78-2.90; tail, 1.70-1.83; 

 culmen, 05-0.75; depth of bill at base, 0.52-0.59; tarsus, 0.84-0.90. 



Range. — Galapagos Archipelago: Chatham Island (Darwin, Kinberg, 

 Townsend, Baur and Adams). 



Adult j»rt?e.— No. 125914, U.S.KM.; Chatham Island, Galapagos, 

 March 30, 1891; C. H. Townsend. Uniform deep black, the feathers 

 abruptly clear slate- gray beneath the surface; under tail-coverts slate- 

 gray basally, very pale brownish buff terminally and laterally (broadly), 

 with a central, more or less cordate, spot of black. Bill wholly deep 

 black; legs and feet grayish black. Length (skin), 5.30; wing, 2.95; 

 tail, 1.75. culmen, 0.70; gonys, 0.38; basal width of mandible, 0.48; 

 basal depth of bill, 0.58; tarsus, 0.85; middle toe, 0.00. 



Immature male.—^So. 115943, U.S.N.M.; Chatham Island, April 5, 

 1888; C. II. Townsend. Head and neck dull black, broken by sooty 

 grayish brown edgings and niottlings; upper i^arts chiefly grayish 

 brown, the feathers with paler edges, many of those on the back (new 

 molt) dull black with indistinct brownish gray margins; feathers of 

 chest and breast black with pale grayish bufty margins, jiroduciug an 

 irregular sjjotted or clouded appearance; rest of under parts pale gray- 

 ish bufty broadly striped with dusky, the longer under tail-coverts, 

 however, nearly immaculate. Bill entirely black ; legs and feet horn 

 dusky. Length (skin), 4.90; wing, 2.70; tail, 1.05; culmen, 0.73; gonys, 

 0.38; basal width of mandible, 0.38; basal depth of bill, 0.52; tarsus, 

 0.80; middle toe, O.GO. 



Younger ( ? ) male. — No. 125917, XJ.S.N.^I. ; same locality, etc. Similar 

 above to the preceding, but under parts without any ''solid" blaclc, the 

 throat and fore neck being i)ale grayish bufly irregularly streaked and 



