GEN. 71-74 OF KEY. 37 



172. POOSPIZA BILINEATA (CASS.) SOL. 



Black-throated Fincb. 



173. POOSPIZA BELLI (CASS.) SOL. 



Bell's Finch. 



174. JUNCO HYEMALIS (L.) SCL. 



Snowbird. 



175? JUNCO OREGONUS (TOWNS.) SCL. 

 Oreg-on Snowbird. 



176? JUNCO CINEREUS (Sw.) CAB., 

 var. CANICEPS (Woodh.) Cs. 

 Cinereous Snowbird. 



177. SPIZELLA MONTICOLA (Gw.) BD. 



Tree Sparrow. 



178. SPIZELLA SOCIALIS (WILS.) BP. 



Chipping- Sparrow. 



178a. SPIZELLA SOCIALIS (WiLS.) BP., 



var. ARIZONA Cs, 

 Arizona Chipping* Sparrow. 



179. SPIZELLA PUSILLA (WiLS.) BP. 



Field Sparrow. 



180. SPIZELLA PALLIDA (Sw.) BP. 



Clay-colored Sparrow. 



180a. SPIZELLA PALLIDA (Sw.) BP., 



var. BREWERI (Cass.) Cs. 

 Brewer's Sparrow. 



181. SPIZELLA ATBIGULARIS (CAB.) BD. 



Black-chinned Sparrow. 



182. ZONOTBICHIA ALBICOLLIS (GM.) Bp. 



^Fhite-throated Sparrow. 



