BIRDS OF NORTH AND MIDDLE AMERICA. 571 



/. Under parts mostly or largely pale Imffy cinnamon (sometimes whitish 

 on throat anil ahdomen); feet stouter; upper i)arts hrowner; wiiij,' 

 relatively longer, tail shorter (averafrinj; more than 50 and less than 

 38, respectively, in adult male) . ( Tnxjlodi/lex )nuiiruhix. ) 

 g. Paler, the under parts distinctly whitish on throat and abdomen; 

 larger (adult male averaging, wing 54, tail 87.(5, exposed cuimen 14.4, 

 tarsua 19.7; adult female, wing 53.5, tail 38.5, exposed cuimen 

 14.5, tarsus 19.7). (Isthmus of Panama, north to Chiriqui.) 

 Troglodytes musoulus inquietus (p. 575 )« 

 g;;. "Darker, the under parts almost entirely pale to deep huffy cinna- 

 mon; smaller (measurements averaging decidedly less than the 



above). , ■ i 



h. Larger (with relatively shorter tail) and slightly paler m color; 

 adult male averaging, wing 51.1, tail 36..S, exposed cuimen 13.2, 

 tarsus 18.7; adult female, wing 47.8, tail 33.5, expo.sed cuimen 

 13.5, tarsus 17.8. (Costa Rica to southern Honduras. ) 



^r<^lodytes musculus intermedias (p. 576) 



/)//. Smaller (with relatively longer tail) and slightly deeper in color; 



adult male averaging, wing 48.6, tail 37, exposed cuimen 12.9, 



tarsus 18; adult female, wing 48, tail 36.8, exposed cuimen 12.3, 



tarsus 18. (Southern Mexico to Guatemala.) 



Troglodytes musculus hypaedon (p. 578) 

 ee. Tail relatively longer (five-sixths as long as wing, or more, 38-50, averag- 

 ing more than 40) ; under tail-coverts with ground color mostly white. 

 ( Troglodytes aedon. ) 

 /. Browner above, the back rarely barred with dusky. (Eastern United 

 States, south to southern Tamaulipas in winter.) 



Troglodytes aedon aedon (p. 579) 

 /. Grayer above, the back usually barred with dusky. (Central and 

 , western temparate North America and greater part of Mexico. ) 



Troglodytes aedon parkmanii (p. 582) 



bb. Superciliary stripe distinct; throat and chest distinctly cinnamon or <Mnnanion- 

 buff; Hanks distinctly barred (except in young). 

 c. Feathers of rump with concealed spots of white; ground color of tail lirown. 

 ( Troglodytes brunneicollis. ) 

 d. Deeper colored, the throat and chest decidedly cinnamomeous, the upper 

 parts browner. 

 e. Cinnamon of under parts paler, the lower alxlomen more or less exten- 

 sively whitish. (SoutluMii Mexico, from States of Guerrero and Oaxaca 

 northward to San Luis Potosi, Mexico, and Zaratecas.) 



Troglodytes brunneicollis brunneicollis (p. 586) 



ee. Cinnamon of under parts deeper, covering whole abdunu-n. (Mount 



Zempoaltepec, Oaxaca.) Troglodytes brunneicollis nitidus (p. 588) 



"Not having the time to study the South American relatives of this form, I fol- 

 low Mr. Oberholser in reducing T. inquietus, T. intennedius, and T. hiipacdim to the 

 rank of subspecies of T. musndns; nevertheless, I have received the impression, from 

 comi.anson of scant material it is true, that Mr. Oberholser has gone too far in reduc- 

 ing the number of specific tyi)es, and that a l)etter arrangement would be to consider 

 7'. (■/(7U/«7((.s' as a sul)species of T. slriidulns, and T. /N/<Tm<'J/((.s- as speciticaily distinct 

 (I have not been able to lind intermediates). The nomenclature of the Central 

 American forms would according to this arrangement be as follows: T. strkilulns 

 inquietus, T. iiitermedius iiitermedius, and T. inlrrinedius hi/poedou. See Oberholser, 

 Proc. U. S. Nat. Mus., xxvii. no. 1354. 1904. pp. 197-210. 



