GEN. 13-17 OF KEY. 11 



31b. PARUS ATRICAPILIiUS L., 

 var. CAROLIXENSIS (Aud.) Cs. 

 Carolina Chickadee. 



31c. PARUS ATRICAPILLUSL., 

 var. OCCIDEXTALIS (Bd.) Cs. 

 Western Chickadee. 



32. PARUS MONTANUS GAMB. 



Mountain Chickadee. 



33. PARUS HUDSONICUS FORSTER. 



HiHlsoiiiaii Chickadee. 



34. PARUS RUFESCENS TOWNS. 

 Chestnut-hacked Chickadee. 



35. PSALTRIPARUS MINIMUS (TOWNS.) BP. 



I^east Titmouse. 



36. PSALTRIPARUS PLUMBEUS BD. 



Plumheous Titmouse. 



37. AURIPARUS FLAVICEPS (SUXD.)BD. 



ITelloiv-headed Titmouse. 



38. SITTA CAROLINENSIS GM. 

 White-hellied IVuthatch. 



38a. SITTA CAROLINENSIS GM., 



var. ACULEATA (Cass.) All. 

 Slender-hilled Nuthatch. 



39. SITTA CANADENSIS L. 

 Red-hellied Nuthatch. 



40. SITTA PUSILLA LATH. 

 Kronen-headed Nuthatch. 



41? SITTA PYGMJEA VIG. 

 Pygmy Nuthatch. 



. 42. CERTHIA PAMILIARIS L. 

 , Brown Creeper. 



