Grey Titmouse 503 



seven in number, are pure white ^\dth light reddish- 

 brown speckling, chiefij^ at the larger end, and average 

 •62 X '47 (Norris). According to Gale, who took a very 

 large number of nests in the hills of Boulder co., and from 

 whose notes this account has been chiefly taKen, fresh 

 eggs are to be met with from the end of May to the 

 middle of June. 



Family PARID^E. 



Small birds — wing under 3, with a short, stout, com- 

 pressed conical bill, shorter than the head, not notched, 

 and with the culmen rounded or flattened ; nostril entirely 

 concealed by dense tufts of feathers ; wing with ten 

 primaries, the outer about half the length of the next, 

 somewhat rounded, shorter than or only just exceeding 

 the tail ; tarsus scutellate ; tail-feathers never stiff or 



acuminate. 



Key of the Genera. 



A. Head crested ; plumage plain ; wing slightly exceeding the tail. 



Bceolophus, p. 503. 



B. Head not crested. 



a. Crown and throat always black ; wing and tail about equal. 



Penthestes, p. 504. 



b. No black on crown or throat ; tail distinctly exceeding the 



wing and markedly graduated. Psaltriparus, p. 508. 



Genus BiEOLOPHUS. 



Head crested ; build very stout and conical ; wings rather long but 

 rounded ; tail slightly shorter than the wing, slightly rounded ; plumage 

 plain grey without black. 



The genus contains four species, confined to the wanner parts of 

 North America. 



Grey Titmouse. Bceolophus inornaius griseus. 



A.O.U. Checklist no TSSa — Colorado Records — Aiken 72, p. 195; 

 Ridgway 73, pp. 179, 189 ; Drew 81, p. 87 ; 85, p. 15 ; Morrison 88, 

 p. 71 ; Lowe 94, p. 270 ; Cooke 97, pp. 122, 169 ; Oilman 07, p. 195 ; 

 Warren 08, p. 25 ; 09, p. 17 ; Rockwell 08, p. 178 ; Gary 09, p. 184. 



