NO. 1116. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



503 



Adult female f . — No. 116102, U.S.KM.j same locality and collector, 

 April 1(3, 1888. Similar to the specimen described above, but slightly- 

 paler beneath and on sides of head, with throat less tinged with bufity; 

 basal half of mandible and maxillary tomium horn brown. Length 

 (skin), 4.05; wing, 2.02; tail, 1.42; exposed cnlmen, 0.42; tarsus, 0.80; 

 middle toe, 0.47. 



Another adult male, No. 110101, U.S.N.M,, obtained April 16, has 

 the under mandible distinctly light colored, except at tip, thus showing 

 the color of the bill to be an inconstant feature in this as well as in 

 some other species of the genus. 



Young.— ^o. 116103, U.S.N.M., Abingdon Island, April 16, 1888, C. H. 

 Townseiid. Above similar to adult, but rather browner, and feathers, 

 especially on back, hind neck, and pileum, showing in certain lights 

 very indistinct narrow terminal bars of dusky; beneath much as in 

 adult, but sides of head and neck, throat, and chest more grayish; 

 sides and flanks faintly mottled with light grayish brown, the flanks 

 tinged with pale buffy. 



Measurements of Certhidea fusca. 



CERTHIDEA CINERASCENS, Ridgway. 



Certhidea cinerascens, Ridoway, Proc. U. S. Nat. Mus., XII, No. 767, Feb. 5, 1890, 

 pp. 105, 119, 127 (Hood Island, Galapagos Archipelago; collectiou of U. S. 

 Nat. Mus.). 



Certhidea oUvascens (lapsus peuua), Ridgway, I'roc. U. S. Nat. Mus., XII, 1890, 

 p. 124 (Hood Island). 



Specific characters. — Similar to G. fusca, Sclater and Salvin, of Abing- 

 don Island, but much grayer above and whiter beneath, and bill smaller. 



Range. — Galapagos Archipelago: Hood Island (Towuseiid, Baur and 

 Adams). 



Adult male. — Type, No. 11()069, Hood Island, Galapagos, April 7, 

 1888, U. S. S. Albatross. Above plain dull brownish gray, beneath 

 wholly dull grayish white, faintly tinged with buflfy, especially along 

 sides. Bill black, basal half of lower mandible horn -color; legs and 

 feet deep black. Length (skin), 3.85; wing, 2; tail, 1.40; exposed cul- 

 men, 0.37; bill from rictus, 0.45; tarsus, 0.73; middle toe, 0.43. 



