GEN. 13-17 OF KEY. 11 



I 



31b. PARUS ATKICAPIIiLUS L., 

 var. CAROLINBNSIS (Aud.) Cs. 

 Carolina Chickadee. 



31c. PARUS ATRICAPILLUSL., 

 ' var. OCCIDENTALS (Bd.) Cs. 

 Western Chickadee. 



32. PARUS MONTANUS GAMB. 



Mountain Chickadee. 



33. PARUS HUDSONICUS FORSTER. 



Hudsonian Chickadee. 



34. PARUS RUFESCEWS TOWNS. 

 Chestnut-backed Chickadee. 



/35. PSALTRIPARUS MINIMUS (TOWNS.) BP. 

 Least Titmouse. 



36. PSALTRIPARUS PLUMBEUS BD. 

 Plumbeous Titmouse. 



/87. AURIPARUS PLAVICEPS (SUND.)BD. 

 Yellon'-headetl Titmouse. 



1/38. SITTA CAROLINENSIS GM. 

 lVhite-bellied Nuthatch. 



38a. SITTA CAROLINENSIS GM., 



var. ACULEATA ^Cass.) All. 

 blender-billed Nuthatch. 



39. SITTA CANADENSIS L. 

 Red-bellied Nuthatch. 



40. SITTA PUSILLA LATH. 

 Brown-headed Nuthatch. 



1/41? SITTA PYGMJSA Via. 

 Pyg-my Nuthatch. 



J/42. CERTHIA PAMILIARIS L. 

 Creeper. 



