548 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Lower Rio Grande Valley, in Texas (Lomita Ranch; Hidalgo; 

 Brownsville; Grancano) and northern Tamaulipas (Matamoras; 

 Camargo). 



Thryothorus ludovidanus, var. berlandieri (not Thriothorus berlandieri Baird) 

 Allen, Bull. Nutt. Orn. Club, ii, 1877, 109 (Fort Brown, Texas).— Merrill, 

 Proc. U. S. Nat. Mus., 1, 1878, 121 (Fort Brown, Texas; descr. nest and eggs, 

 etc.) 



Thryothorus ludovidanus berlandieri Coues and Sbnnett, Bull. U. S. Geol. and 

 Geog. Surv. Terr., iv, no. 1, 1878, 8 (Hidalgo, Texas).— Sennett, Bull. U. S. 

 Geol. and Geog. Surv. Terr., v, 1879, 383 (Lomita, Texas; measurements, 

 etc.).— Coues, Check List, 2d ed., 1882, no. 68, part. 



Tlhryothorus'] l[udovicianu8'] berlandieri Coues, Key N. Am. Birds, 2d ed., 1884,- 

 277, part. 



Thryothorus berlandieri Salvin and Godman, Biol. Centr.-Am., Aves, i, 1880, 94, 

 part.— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 222, part. 



Thryotlwrus ludovidanus lomitensis Sennett, Auk, vii, Jan., 1890, 58 (Lomita 

 Eanch, Hidalgo Co., Texas; coll. G. B. Sennett).— American Ornithol- 

 ogists' Union, Auk, vii, 1890, 64; Check List, 2d ed., 1895, no. 7186.— Eidq- 

 way, Man. N. Am. Birds, 2d ed., 1896, 609. 



Tlhryothorus'] ludovidanus Eidqway, Man. N. Am. Birds, 1887, 550, part. 



Genus THRYOMANES Selater. 



Thryomanes Sclater, Cat. Am. Birds, 1862, 22. (Type, Troglodytes bewicUi 

 Audubon. ) 



Small Troglodytidse (wing 45-60 mm.) resembling Thryothorus, but 

 hallux (without claw) not longer than outer toe (without claw), bill 

 much more slender and more depressed basally, and nostril much 

 narrower. 



Bill slender, compressed anterior to nostrils, depressed basally, 

 usually shorter than head; exposed culmen equal to or longer than 

 middle toe without claw, gradually curved from base, the terminal 

 portion more decidedly so; gonys decidedly shorter than distance from 

 nostril to tip of maxilla, straight throughout or faintly concave ter- 

 minally, the tip of mandible faintly decurved; maxillary tomium 

 faintly concave anterior to nostril, faintly convex posteriorly, without 

 trace of subterminal notch; depth of bill at frontal antise about equal 

 to its width at same point. Nostril longitudinal, linear, or narrowly 

 guttata or fusiform, overhung by a rather broad corneous excurrent 

 operculum, its posterior end in contact with feathering of the latero- 

 frontal antise. Rictal bristles obvious,'' but only two or three distinct 

 and these small. Wing short, rounded; eighth, seventh, and sixth or 

 seventh, sixth, and fifth primaries longest, the ninth not longer than 

 second, usually shorter, sometimes shorter than secondaries; tenth 

 about half as long as ninth or a little more. Tail not less than four- 

 fifths as long as wing, usually nearly as long, sometimes longer, much 



o Except in T. insularis. 



