1914] Grinncll : Mammals and Birds of the Colorado Tall, y lf>7 



Passerculus sandwichensis nevadensis Grinnell 

 Nevada Savannah Sparrow 

 Pour Savannah sparrows referable to this form were taken : no. 

 13116, California side, opposite The Needles, March 3 (the only one 

 of the genus seen here) ; nos. 13117, 13118, Arizona side, above mouth 

 of Bill Williams River. March 13; and no. 13119, Arizona side, five 

 miles north of Laguna, April 22. 



Passerculus sandwichensis alaudinus Bonaparte 

 Western Savannah Sparrow 

 Five specimens secured, all on the Arizona side: nos. 13120. 13121. 

 above Bill Williams River. March 13. and nos. 13122, 13123, 13128, 

 five miles north of Laguna, April 22. At both places small areas of 

 grassy land on the river bottom back near the mesa afforded the attrac- 

 tion to the species. The last-mentioned specimen is so nearly an inter- 

 mediate in all characters between P. s. alaudinus and P. s. nevadt nsis 

 as to be allocated uncertainly with one or the other. At least six Sav- 

 annah sparrows were observed in a tract of low herbage lying near the 

 river, five miles northeast of Yuma, May 2 ; these were the last to 

 be noted. 



Chondestes grammacus strigatus Swainson 

 Western Lark Sparrow 

 One specimen taken (no. 13129) at edge of bottom near mesa on 

 California side at base of Riverside Mountain, March 17. Not other- 

 wise seen by our party. 



Zonotrichia leucophrys leucophrys (Forster) 

 White-crowned Sparrow 

 Appeared in the region only as a transient. First noted in Cheme- 

 huevis Valley, California side, March 11, when an adult female (no. 

 13130) in worn winter plumage was shot from a flock of Z. I. gambeli. 

 This must have been an exceptionally early arrival, or possibly a 

 stray sojourner through the winter. For no more were identified with 

 certainty until April 11, when a male (no. 13131) was taken on the 

 California side, twenty miles north of Picacho. This bird is in the 

 midst of the first prenuptial molt, as is also another (male. no. 13133) 



