THRYOTHORUS. 551 



(.53), tarsus .62-.T5 (.67). Eggs .67 X -50. Hab. Eastern United 

 States, rare and local east of Alleghanies and north of 40 ; 

 west to edge of Great Plains ; winters in more southern dis- 

 tricts (Georgia to eastern Texas). 



719. T. bewickii (AuD.). Bewick's Wren, 

 d*. Top of head, back, etc., duller or grayer brown. 



e l . Decidedly brown above (of a shade closely approximating a 

 medium tint of bistre), the middle tail-feathers more gray- 

 ish brown, in very slight contrast with color of back (rarely 

 distinctly grayish) ; length about 5.00-5.50, wing 2.00- 

 2.15 (2.08), tail 2.08-2.30 (2.15), exposed culmen .52-.60 

 (.55), tarsus .62-.75 (.72). Eggs .64 X -50. Hab. Pacific 

 coast, north to British Columbia, south to Lower Califor- 

 nia and western Mexico. 1 



719a. T. bewickii spilurus (Yia.). Vigor's Wren. 

 e 2 . More grayish brown above, the upper tail-coverts and middle 

 tail-feathers distinctly gray (often pure ash-gray), in de- 

 cided contrast with color of back ; length 5.00-5.75, wing 

 2.10-2.40 (2.21), tail 2.10-2.55 (2.28), exposed culmen .50- 

 .60 (.56), tarsus .68-.7S (.70). Eggs .65 X -49. Hab. Table- 

 lands of Mexico and contiguous portions of United States 

 (southern and western Texas to Arizona, and north to 

 southern Utah, Colorado, and middle Kansas). 



7196. T. bewickii bairdi SALV. & GODM. Baird's Wren. 

 a 2 . Feathers of rump without distinct (if any) concealed white spots. 



b l . Wing less than 2.00 ; flanks dull ash-gray ; tail dull grajnsh brown, nar- 

 rowly and indistinctly barred with dusky, the two or three outer 

 feathers spotted at tips with light brownish gray, their inner webs 

 nearly uniform dusky. (Subgenus Thryomanes SCL., part ?) 



Very similar, otherwise, in color to T. bewickii spilurus ; length about 

 4.50, wing 1.85-1.90, tail 1.80, exposed culmen .67-.70, tarsus .70- 

 .75. Hab. Guadalupe Island, Lower California. 



720. T. brevicaudus EIDGW. Guadalupe Wren. 

 b\ Wing decidedly more than 2.00 ; flanks buffy, ochraceous, or brown ; tail 



brown, broadly barred with dusky. (Subgenus Thryothorus, part ?) 

 c 1 . Lower parts unspotted. (Above grayish brown, more russet on top of 



head.) 



d 1 . Lower parts ochraceous, paler along middle line, and white on 

 chin and throat ; sides of head heavily streaked with black, the 

 throat bordered laterally by a distinct black line ; length about 

 5.00-5.50, wing 2.10-2.35, tail 2.25-2.35, bill from nostril .39- 



1 Specimens from western Mexico (Guadalajara) are not typical, being much larger than those from Cali- 

 fornia and Lower California, the wing averaging 2.27, the tail 2.28, and exposed culmen .59 ; their coloration, 

 however, is not obviously different. 



