192 TIMELIID.E. 



the entire upper surface streaked with Avhitc and mottled with black 

 spots, which impinge on the central white markings ; on the mantle 

 the white spots are rufescent, on the lower back they take the form 

 of long streaks bordered on each side with black ; the hind neck is 

 uniform chestnut. Such are the differences shown in a specimen lent 

 to me by Messrs. Salvin and Godmau from Costa Eica (Carmiol). 

 This bird they have compared with Baird's type of C. riijitmcha^ 

 which it resembles on the back ; but the latter has a few scattered 

 spots on the tianks and a barred crissum. Guatemalan specimens 

 in the Salvin and Godman collection have remains of both the dorsal 

 spotting and the spotted tianks and under tail-coverts, and in one 

 bird the latter arc barred, so that these markings are evidently not 

 specific characters, but disappear. Even if the idea that they are 

 merely indications of age be unaccepted, and the Costa-Eica bird be 

 considered a distinct race, it could never be separated specifically, on 

 account of the complete gradation of intermediate links afforded by 

 the Guatemalan series. 



The Chestnut-backed Cactus-Wren is only found in Central 

 America, where it inhabits the outskirts of forests and open country, 

 from the sea-level up to about 3000 feet elevation. It occurs 

 from the State of Vera Cruz in Mexico to Costa Eica. 



a. Ad. sk. Guatemala. Eyton Collection. 



h. Ad. sk. Realejo, Nicaragua. G. Barclay, Esq. [C.]. 



9. Campylorhynchus humilis. 



Campylorhynchus humilis, Sclafer, Proc. Acad. Nat. Sri. Phi/ad. 



1856, p. 26.3 ; Baird, Revieio Amer. B. p. 107 ; Gray, Hand-l. B. i. 



p. 193, no. 2657 ; Sumichr. Mem. Bost. Soc. N. II. i. p. 545 ; Lawr. 



op. cit. ii. p. 267 ; id. Bull. U.S. Nat. Mus. no. iv. p. 13; Scl. S, 



Salv. Nomencl. Av. Neotr. p. 5 ; Salv. Sf Godm. Biul. Centr.-Amer., 



Aves, i. p. 65. 

 Campylorhynchus rufinucha, Grao, Hand-l. B. i. p. 192, no. 2645 



(wee Lafr.). 

 Adult. General colour above light brown, mottled with white 

 streaks on the back, nowhere very distinct, the white streaks 

 having blackish-brown spots on each side, imparting a some- 

 what barred appearance ; least wing-coverts like the back ; median 

 and greater coverts brown, barred with white and black and varied 

 with central triangular spots of white : primary-coverts uniform 

 brown ; quills brown, notched with huffy white on the outer web, 

 producing a barred appearance, the inner secondaries barred right 

 across the feathers ; upper tail-coverts brown, barred with blackish 

 and more narrowly with white ; tail-feathers ashy brown, narrowly 

 tipped with whitish, and barred across with blackish brown, about 

 seven dark bars being recognizable ; remainder of tail-feathers black, 

 notched with white on the outer web, and having a broad bar of 

 white near the tip of the inner web ; all the feathers with a subter- 

 minal bar of ashy brown, the outer feather barred with white for 

 the terminal third ; head chestnut-brown, the hind neck chestnut, 

 the feathers of the forehead and the crown black with chestnut 

 ed"-ino-s ; a broad, eyebrow buffy white, surmounted by a narrow 



