BIRDS OV NORTH AlSTD MIDDLE AMERICA. 539 



buff), and sides of head and neck much less strongly streaked with 

 black (the suborbital and auricular regions sometimes almost wholly 

 white). 



Adult VMi,7<'.~L,ength (skins), 132-146 (138.1); wing, 58-61 (69.7); 

 tail, .54-58 (65.9); exposed culmen, .18; tarsus, 22-22.. 5 (22.1); middle 

 toe, 14-15 (14. 4). « 



Adult female.— 'Length (skins), 131-141 (136); wing, 54-68 (56.1); 

 tail, 52-59 (54.7); exposed culmen, :.6.5-18 (17); tarsus, 20-23 (21.3); 

 middle toe, 13-14 (13.4).'' 



Maria Madre Island, Tres Marias group, western Mexico. 



Thryothorus felix (not of Sclater) Grayson, Proc. Bost. Hik: N. H., xiv, 1872, 



278 (Tres Marias; habits).— Lawrence, Mem. Bost. Soc N. H., ii, 1874, 268, 



part (Tres Marias). 

 Thryothorus felix, /J laiorencii Ridgway, Bull. Nutt. Orn. Club, iii, Jan., 1878, 



10 (Tres Marias Islands, w. Mexico; coll. U. S. Nat. Mus.). — Salvin, Ibis, 



1878, 196 (crit.). 

 Thryothorus Imvrmeii Salvin and Godman, Biol. Centr. Am., Aves, i, 1880, 



93.— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 232.— Nelson, North Am. 



Fauna, no. 14, 1899, 57 (Maria Madre I., Tres Marias; habits; song; crit.). 

 Tlhryothorusl lawrencii Ridgway, Man. N. Am. Birds, 1887, 552. 

 Thryothorus felix lawrencii Foster, Bull. U. S. Nat. Mus., no. 40, 1892, p. x. 



PHEUGOPEDIUS FELIX MAGDALEN.^ (Nelson). 

 MAGDALENA ISLAND WREN. 



Similar to P. f. lamrencii in slight amount of streaking on side of 

 head and neck, but otherwise similar in coloration to P.f.palUdus, or 

 even darker than the average of that form. 



Adult male. — Length (skin), 136; wing, 56; tail, 54; exposed culmen, 

 18; tarsus, 21; middle toe, IS.'' 



Maria Magdalena Island, Tres Marias group, western Mexico. 



Thryothorus lawrencii magdalenai Nelson, Proc. Biol. Soc. Wash., xii, Jan. 27, 

 1898, 11 (Maria Magdalena I., Tres Marias group, n. w. Mexico; coll. U. S. 

 Nat. Mus.); N. Am. Fauna, no. 14, 1899, 58 (habits). 



Genus THRYOTHORUS Vieillot. 



Thriothoms Vieillot, Analyse, 1816, 45 (corrected to Thryothorus on p. 70). "^ 

 (Type, Troglodytes arundinaoeus Vieillot, =Sylvia ludoviciana Latham. ) 



Thryothurus (emendation ?) Swainson, Classif. Birds, ii, 1837, 319. 



3%r!,oton(s {typographical error?) Reichenbach, Av. Syst. Nat., 1850, pi. 57. 



Hylemathrous Maximilian, Beitr. Naturg. Bras., iii, 1830, 742, part. (To replace 

 Thryothorus, ^ rejected on ground of inappropriateness. ) 



o Five specimens. 

 !* Seven specimens. 

 « One specimen (the type). 

 <i See Coues, Auk, xiii, 1896, 345. 



«The species included by Maximilian under Hylemathrous (or Thryothorus) belong, 

 however, mostly to the genus Troglodytes. 



