1(38 ProcGedings of the Biological Society (f Washington. 
Range. —As!?ociationally suitable parts of the (Jreat Basin faunal area, 
at least in Nevada and northeastern California. Specimens at hand as 
foJl)v,'s; Ne.vo.da: lluinholdt County: (duinn Hiver Crossing 2l’, Big 
Creek Ranch 'J, Virgin Valley 4, Thousand Creek Flat 2; California : 
Modoc Cminty: Goose Baked, Sugar Hill 1, Parker Cheek 8, Alturas 11 ; 
Siskiyou County; IMayten 7; Plumas County; Meadow ^hdley 1 ; Inyo 
County: Bone Pine 1, Independence 17. Total, 80. 
Remarks. —The new form belongs to the weak-hilled category of Red¬ 
wings. It is thus easily distinguished fi’om .I. p. netilralis of southern 
California. The full-width huti'y bar ou the wing in the male, and the 
conspicuously striped (not blended) coloration of the female render 
nevadensis distinct from A. p. callfornicus. (For correct assignment of 
characters and relationships of the latter form, see IMailliard, Condor, 
voh 12, 1010, pages 03-70.) A. p. caurinus has the feeblest hill of all 
the western forms, and the female, although heavily streaked, has much 
redder edgings to the feathers dorsally than in nevadensis. A. p. sonori- 
ensis and A. p. nevadensis both have pale “ ground-color,” hut the latter 
has much wider black .streaking both al)Ove and below. The.se facts re¬ 
call the situation among the song sparrows occupying corresj)Onding 
habitats, both faunal and associational, and suggest that similar factors 
bear upon these remotely related hii-ds in such a way as to produce like 
results. 
