b. Outer webs of primaries distinctly edged with white at base.
4. Above black, except on rump, which is tinged with olivaceous. White spots very large, without black border. Inner web of lateral tail-feather with terminal half white, the outer web almost wholly white. Wing, 3.50; tail, 3.90; hind claw, .39. Female umber-brown, replacing black. Hab. Plains between Rocky Mountains and the Missouri; Saskatchewan Basin … var. arcticus.
B. Interscapulars without white streaks.
5. Above dusky olive; white spots on scapulars and wing-coverts small, and without black edge. Tail-patches very restricted (outer only .40 long). No white on primaries. Wing, 2.85; tail, 3.10. Female scarcely different. Hab. Socorro Island, off west coast of Mexico … var. carmani.[22]
PLATE XXXI.
1. Chondestes grammaca. ♂ Cal., 6300.