BIRDS OF NORTBt AND MIDDLE AMEKIOA. 55l 



hh. 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 upper parts slightly more olivaceous brown. 



(Central Mexico.) Thryomanea tewiokii murinus (p. 559) 



ff. Paler. (Northwestern Mexico and contiguous parts of southwestern 

 United States, from southeastern California to western Texas, north 

 to southern Nevada and Utah and southwestern Colorado. ) 



Thryomanes bewiokii eremophilus (p. 557) 



ee. Color of uj^per parts more rufescent grayish brown. (Texas, except 



western portion, and northward to eaistern Colorado and middle 



Kansas. ) Thryomanes bewickii oryptus (p. 555) 



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



Island, Lower California. ) Thryomaues brevicaudtia (p. 567) 



aa. Superciliary s'tripe not sharply defined, inconspicuous, pale 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. ) Tliryomanes insularis (p. 568) 



^'HRYOMANES ALBINUCHA (Cabot). 

 CABOT'S WEEN. 



Very similar in coloration of upper parts to T. hewicMi spilwrua and 

 T. h. calophxmus, but much larger, with relatively shorter wing and 

 tail and longer bill, and under parts more buflfy white, with flanks 

 strongly brownish buff. 



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

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

 dish brown (prouts brown) 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 with small terminal triangular 

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

 color to back, indistinctlj' barred with darker (the bars sometimes 

 obsolete on the former); primaries more broadly and distinctly 

 barred with grayish dusky, the brown interspaces becoming p§.ler 

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

 grayish brown, narrowly barred or otherwise marked with dusky; 

 inner webs of remaining rectrices dusky, narrowly and indistinctly 

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

 brown, more or less distinctly barred with dusky; four outermost 

 rectrices (on each side) tipped with grayish, this much broader and 

 mixed with white on the exterior rectrix, the second also with tip 

 partly whitish; outer web of lateral rectrix broadly barred with white, 

 the white bars and black interspaces about equal in width; next rectrix 

 with several white spots on terminal third or more, the third more 

 rarely, sometimes even the fourth, also spotted with white terminally; 

 a conspicuous and sharply defined superciliary stripe of white, extend- 



