548 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



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

 Brownsville; Grancano) and northern Tamaulipas (Matamoras; 

 Camargo). 



Thryothorus ludovicianus, var. herlandicrl (not Thriolhorus herlandieri Baird) 

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

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

 etc.) 



Thryothorun ludoi'lcianus herlandieri Coues and Sennett, 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. 



T\h.ryothorus] l\_ndovicianus] herlandieri Coues, Key N. Am. Birds, 2d ed., 1884, 

 277, part. 



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

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



Thryothorus ludovicianus lomitensis Sennett, Auk, vii, Jan., 1890, 58 (Lomita 

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

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

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



T\hryothorus'] ludovicianus Ridgway, Man. N. Am. Birds, 1887, 550, part. 



Genus THRYOMANES Sclater. 



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

 Audubon. ) 



Small Troglodytidie (wing 45-60 mm.) resem})ling Tliryot/wrus^ but 

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

 much more slender and more depressed basallj^, and nostril nnich 

 narrower. 



Bill slender, compressed anterior to nostrils, depressed basall}^ 

 usually shorter than head; exposed culmen ecjual 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 faintlv concave ter- 

 minally, the tip of mandible faintly decurved; maxillaiy tomium 

 faintly concave anterior to nostril, faintly convex posteriorly, without 

 trace of subterminal notch; depth of bill at frontal antire 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 



« Except in T. insularis. 



