GEN. 53-58 OF KEY. 27 



131. VIREO BELLII AUD. 



Bell's Vireo. 



132. VIREO PUSILLUS COUES. 



[Least Vireo. 



133. VIREO ATRICAPILLUS WOODH. 



.Black-headed Tireo. 



134. COLLURIO BOREALIS (V.) BD. 

 Great Northern Shrike; Butcherbird. 



135. COLLURIO LUDOVICIANUS (L.) BD. 



JLogrgrerhead Shrike. 



135a. COLLURIO LUDOVICIANUS (L.) BD., 

 var. EXCUBITOROIDES (Sw.) Cs. 

 White-rumped Shrike. 



136. HESPERIPHONA VESPERTINA (Coop.) BP, 



Kvening* Orosbeak. 



137. PINICOLA ENUCLEATOR (L.) V. 



Pine Grosbeak. 



[138.]? PYRRHULA CASSINI (BD.) TKISTR. 

 Cassin's Bullfinch. 



139. CARPODACUS PURPUREUS (GM.) GB. 



Purple Finch. 



140. CARPODACUS CASSINI BD. 



Cassin's Purple Finch. 



HI. CARPODACUS FRONT ALIS (SAY) GR. 

 Crlnison-fronted .Finch: House Finch. 



Hla.* CARPODACUS PRONTALIS (SAY) CAB., 

 var. HJSMORRHOUS (Wagl.) Ridg. 

 Mexican Purple Finch. 



*Not in the Key. See Ridgway, Am. Jour. Sci. Art, v, p. 39. 



