BIRDS OK NORTH AND MIDDLK AMERICA. 551 



////. Wing and bill shorter, tail and tarsus longer (adult male averag- 

 ing, wing 58.2, tail 57.9, exposed culmen 14.6, tarsus 19.9; adult 

 female averaging, wing 56.3, tail 56.3, exposed culmen 14.2, 

 tarsus 19); color of upjicr parts slightly more olivaceous brown. 



(Central Mexico.) Thryomanes bewickii murinua (p. 559) 



//'. Paler. (Xorth western Mexico and contiguous parts of southwestern 

 Unitc'l States, from southeastern California to western Texas, north 

 to southern Nevada and Ttah and southwestern Colorado.) 



Thryomanes bewickii eremophilus (p. 557) 



ee. Color of U])per parts more rufescent grayish l)rown. (Texas, excei)t 



wtwtern i>ortion, and northward to eastern Colorado and middle 



Kansas. ) Thryomanes bewickii cryptns (p. 555) 



cc. Smaller, with longer bill and shorter tail; tail 41-44.5 mm. (Guadalupe 



Island, Lower California. ) Thryomanes brevicaudns ( p. 567) 



aa. Superciliary stripe not sharply defined, inconsi)icuous, ])ale buffy; inner webs 

 of rectrices (except middle pair) grayish, narrowly and indistinctly barred 

 with dusky, and without broad whitish or mottled grayish tips. (Socorro 

 Island, western Mexico.) Thryomanes insularis (p. 568) 



THRYOMANES ALBINUCHA (Cabot). 

 CABOT'S WREN. 



Very similar in coloi'iition of upper jKirts to T. heiricJdl sj>{lur}i'-! and 

 T. h. calophonux^ l)iit much larger, with relatively shorter wino- und 

 tail and lono-er bill, and under i);irt,s more ])ufTv white, with flanks 

 strongly )>ro\vnish hull'. 



Adults {sexes aliJie). — Above plain warm sepia or bistre brown, duller 

 or grayer on pileum (especially the forehead), warmer or more red- 

 dish })rown (prouts l)rown) on rump, where the feathers have large 

 concealed spots of white, their basal portion being dark slate color 

 or blackish slate; lesser and middle wing-coverts grayish brown, the 

 latter with paler margins, sometimes Avith small terminal triangidar 

 spots or streaks of whitish; greater coverts and secondaries similar in 

 color to back, indistinctly barred with darker (the bars sometimes 

 obsolete on the former); i)rimaries more broadly and distinctly 

 barred with grayish dusky, the brown interspaces becoming paler 

 (sometimes dull whitish) on exterior cpiills; middle pair of rectrices 

 grayish brown, narrowly barred or otherwise marked with dusky; 

 inncu" webs of remaining rectrices dusky, narrowly ;uul indistincth' 

 barred with blackish, thiMr outer webs, except the two outermost, 

 l)rown, more or less distinctly barred with dusky; four outermost 

 rectrices (on each side) tipped with gi'ayish, this inucii bi'oader and 

 mixed with white on the exterior rectrix, tlie second also with ti}) 

 parth' whitish; outer web of lateral rectrix broadly barred with white. 

 the white bars and black interspaces alxmt e(|ual in width; next rectrix 

 with several white spots on terminal third or more, tlu^ third more 

 rarely, sometimes even the fourth, also sj)ott(Ml with white terminally; 

 a conspicuous and shar[)ly delined su[nM(iliary stripe of white, extend- 



