Wing, 4.40; tail, 5.70; bill, .79; tarsus, 1.35; middle toe, .90 (5,652 ♂ Republican River). Hab. Plains between Missouri River to Rocky Mountains … var. longicauda.
Above umber brown; markings beneath black; tail-feathers not paler at tip; wing, 3.90; tail, 4.90; bill, .85, slightly curved; tarsus, 1.40; middle toe, .94 (4,016 ♂ Brownsville, Tex.) Hab. Eastern Mexico, north to Rio Grande of Texas … var. longirostris.
2. H. ocellatus.[23] The markings circular; wing bands conspicuous.
Above grayish-brown; markings beneath black; tail-feathers broadly tipped with white; wing, 4.10; tail, 5.60; bill, from rictus, 1.50, moderately curved; tarsus, 1.50. Hab. Oaxaca, Mex.
3. H. cinereus. The markings deltoid; wing bands narrow, but sharply defined.
Above brownish-cinereous; markings beneath blackish-brown; tail-feathers broadly tipped with white; wing, 4.00; tail, 4.60; bill, .88, much curved; tarsus, 1.30; middle toe, .85 (12,960 “♀”—♂? Cape St. Lucas). Hab. Cape St. Lucas, Lower California.
B. Spots beneath obsolete, not darker than the plumage above; roundish in form.
4. H. curvirostris.
Above cinereous; wing bands distinct; spots below distinct, upon a white ground; femoral region and crissum very pale ochraceous; tail-feathers broadly and sharply tipped with pure white; wing, 4.30; tail, 4.50; bill, 1.00, stout, moderately curved; tarsus, 1.40; middle toe, 1.12 (7,200 ♂ Ringgold Barracks, Texas). Hab. from Rio Grande valley in Texas to Cordova, Orizaba, Oaxaca, Colima, and Mazatlan … var. curvirostris.
Wing bands obsolete, and tail spots very narrow and obsolete; spots below just discernible upon a grayish ground; femoral region and crissum dilute ochraceous-brown; wing, 4.30; tail, 5.20; bill, 1.00, slender, moderately curved; tarsus, 1.30; middle toe, 1.00 (8,128 ♂ “New Mexico”—probably Eastern Arizona). Hab. Arizona (Camp Grant) … var. palmeri.