564 NORTH AMERICAN BIRDS. 



.68 (.65). Eggs .65 X -50. Hah. Eastern Siberia and north- 

 ern Alaska (St. Michael's to Fort Anderson). 



739. P. cinctus obtectus (Cab.). Siberian Chickadee. 

 d?. Sides of neck ash-gray ; ear-coverts paler grayish, fading to white 

 on cheeks ; tertials without distinct whitish edges ; sides dull 

 rusty. 



Top of head hair-brown ; throat sooty blackish ; length 

 about 5.00-5.75, wing 2.35-2.70 (2.52), tail 2.30-2.80 (2.55), 

 tarsus .62-.70 (.68). Eggs .58 X -50. Hah. Northern North 

 America east of Rocky Mountains, south to northern por- 

 tions of Michigan, New York, New England, etc., north to 

 Davis' Straits and Alaska. 



740. P. hudsonicus Forst. Hudsonian Chickadee.^ 

 c^ Back deep rusty chestnut. (Top of head deep sepia-brown ; throat 

 darker, more sooty ; sides of head and neck pure white.) 

 d}. Sides and flanks bright I'usty, or rusty chestnut, like back ; length 

 about 4.50-5.00, wing 2.35-2.60 (2.47), tail 2.00-2.30 (2.10), tar- 

 sus .60-70 (.68). Hab. Coast district of Oregon, "Washington 

 Territory, British Columbia, and southern Alaska. 



741. P. rufescens Towns. Chestnut-hacked Chickadee. 



d}. Sides and flanks light grayish, very slightly or not at all tinged 



with rusty ; wing 2.30-2.60 (2.41), tail 2.00-2.20 (2.10), tarsus 



.60-.70 (.65). Eggs .59 X -46. Hab. Coast of California. 



741a. P. rufescens neglectus Eidgw. Californian Chickadee. 



Genus PSALTRIPARUS Bonaparte. (Page 558, pi. CXXIL, fig. 5.) 



Species. 



Common Characters. — Above plain grayish or brownish (or both), the crown 

 difi'erent in color from back (except in P. plnmbeiis) ; beneath plain light grayish, 

 grayish white, or brownish white. JVest very bulky, purse-shaped, with the en- 

 trance a small circular opening usually on one side near top, composed of mosses, 

 plant-fibres, lichens, and other soft materials, lined with soft feathers ; suspended 

 from low bushes. Eggs 5-9, pure white, without markings. 



a\ Back gray. 



b^. Top of head light brownish, sides of head much paler. 

 c\ Back, etc., brownish gray. 



d^. Darker, the back deep brownish gray, or grayish brown, the top 

 of head sooty brown, lower parts light smoky brown, deeper 

 along sides; length about 4.00-4.50, wing 1.95, tail 2.20, tarsus 

 .65 (only one specimen examined). Hab. Northwest coast, 

 from northern California (?) to Washington Territory. 



743. P. minimus (Towns.). Bush-Tit. 



1 See Appendix, page 591. 



