70 Brewster 071 a Collcct/o//^ of Arizona Birds. 



tulvous-white. The breast and abdomen are everywhere thicklv but 

 finely spotted with dull black, these markings becoming finer and fainter 

 where they border on the anal region. The remaining three (Nos. 538, 5 ; 

 539, — ; and 540. $ : twenty-five miles north of Tucson, June 16) have the 

 wings fully developed, and were all out of the nests when shot. They 

 are apparently of about the same respective ages, but nevertheless exhibit 

 a good deal of individual variation. No. 538 has the breast and sides 

 finely spotted with dark brown, but a ceurtral space extending forward 

 along the abdomen nearly to the breast is entirely unmarked. No. 535 

 has large, rounded, but indistinct blotches of light brown, thickly and 

 evenly distributed over the entire under parts, excepting the throat, 

 anal region and crissum. No. 539 has a cluster of faint, sagittate spots 

 on the centre of the breast, but otherwise is entirely immaculate beneath. 

 All three are essentially similar above, and differ from No. 426 in having 

 the crown, nape, back, wing-coverts and outer webs of the secondaries 

 pale reddish-brown, which, on the rump, is only tinged with chestnut. 

 The primaries are dark brown edged with hoary; the rectrices, dull black 

 with a terminal band of pale reddish-chestnut crossing both webs of all 

 the feathers, but niost broadly those of the outer pairs. 



The adults making up the rest of this series vary a good deal with the 

 season at which they were taken. A specimen killed in February is clear 

 grayish-brown above, with the breast and abdomen thickly spotted ; and 

 one or two others shot early in May are nearly as deeply colored and dis- 

 tinctly marked. But most of the breeding birds are either entirely im- 

 maculate beneath, or with only a few faint specks scattered here and there 

 upon the abdomen. Several of the latter are nearly as pale as my speci- 

 mens of H. lecontci, and equally devoid of any special markings. This 

 condition apparently is due mainly to the wearing ofi" of the tips of the 

 feathers, although the continued action of the sun's rays doubtless lends 

 its aid, and still further bleaches the plumage. 



453, $ ad. Camp Lowell, May 30. Length. 10.30: extent, 13.30. 



4987, (author's coll.) $ ad., Tucson, Feb. 28. 1S80. Wing, 4.25; tail. 

 4. 84; culmen (chord), .99. 



423. (J ad., twenty-five miles south of Tucson. May 21. Length. 10.40; 

 extent 14.20; wing, 4.30; tail, 4.92; culmen, i.oO. 



425, $ ad., same locality. May 22. Length, 10.30; extent, 13.10; wing, 

 4.01; tail. 4.96; culmen, 1.05. 



455, (J ad.. Camp Lowell. May 30. Length, 10.18: extent, 13.30; 

 wing, 4.20: tail, 4.96: culmen, 1.05. 



537, J ad.. t\vent\-five miles north of Tucson. June 16. Length, 10. lo: 

 extent, 12.70; wing, 4.14: tail, 4. 78: culmen, i.oi. 



583, $ ad., Camp Lowell. June 24. Length, 10.50; extent. 13: wing, 

 3.99; tail. 4.95; culmen, 1.05. 



454, $ ad., Camp Lowell, May 30. Length. 10.10: extent. 12.70: wing, 

 3.95; tail. 4.43; culmen, i. 



^29, § ad., twenty-five miles north oi'i'ucson. [une 16. Length. 10.20; 

 extent. 12.10; wing, 3.63; tail. 4.50: culmen, i.oi. "Iris yellow: legs 

 dull bluish." 



