564 NORTH AMERICAN BIRDS. 



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

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



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

 cP. 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. Hab. Northern Norlh 

 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. 1 

 c 2 . Back deep rusty chestnut. (Top of head deep sepia-brown; throat 



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

 d 1 . Sides and flanks bright rusty, 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-backed Chickadee. 



(P. 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. 



741<z. P. rufescens neglectus RIDGW. Californian Chickadee. 



GENUS PSALTRIPARUS BONAPARTE. (Page 558, pi. CXXIL, fig. 5.) 



Species. 



COMMON CHARACTERS. Above plain grayish or brownish (or both), the crown 

 different in color from back (except in P. plumbeus) ; beneath plain light grayish, 

 grayish white, or brownish white. Nest 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 1 . Back gray. 



6 l . Top of head light brownish, sides of head much paler. 

 c 1 . Back, etc., brownish gray. 



d 1 . Parker, 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. 



