Tail-coverts partially or wholly yellow. Wing, 3.25 to 3.50; Tail, 3.75 to 4.00; culmen, .80; tarsus, .85. Hab. South Mexico to Costa Rica … var. prosthemelas.[35]
Tail-coverts uniform black. Wing, 3.75; tail, 4.50; culmen, .80; tarsus, .90. Hab. Mexico and Guatemala … var. wagleri.
Abdomen and sides black.
Flanks and crissum yellow; upper tail-coverts yellow. Wing, 3.50; tail, 3.50; culmen, .80; tarsus, .85. Hab. Hayti … var. dominicensis.[36]
Flanks black; crissum mostly yellow; upper tail-coverts black. Wing, 3.75; tail, 4.00; culmen, .93; tarsus, .85. Hab. Porto Rico … var. portoricensis.[37]
Flanks black; crissum mostly black; upper tail-coverts black. Wing, 3.75; tail, 3.90; culmen, .80; tarsus, 86. Hab. Cuba … var. hypomelas.[38]
I. spurius. Head, neck, back, scapulars, wings, and tail, deep black; other portions, including lesser and middle wing-coverts, lining of wing, and the tail-coverts, above and below, chestnut-rufous; greater coverts and secondaries edged with dull white, and tail-feathers margined terminally with the same. Female greenish-yellow, darker above. Young male in second year similar, but with a black patch covering face and throat. Wing, 3.20; tail, 3.20, its graduation, .45; culmen, .73; tarsus, .92. Hab. Eastern Province of United States; south throughout Middle America, to New Granada.
b. Tail-feathers (except the two middle ones) with their basal half yellow.
I. parisorum. Head, neck, jugulum, back, scapulars, wings, and terminal half of tail, deep black; rest of plumage, including lesser and middle wing-coverts, bright lemon-yellow, approaching white on the middle coverts; greater coverts tipped with white, and tertials edged with the same; tail-feathers margined terminally with the same. Sexes very different. Hab. Mexico; Rio Grande Valley and Cape St. Lucas.
B. Crown, occiput, nape, and auriculars, orange; frontlet, lores, cheeks, chin, throat, and jugulum, deep black.