This bird is perhaps rather a local race (larger as more boreal) of I. melanocephalus[41] of Southern Mexico. The differences are indicated in the foot-note.
The adult male of this species can be distinguished from the young male of I. prosthemelas only by stouter and less decurved bill, stronger feet, and black instead of yellow middle wing-coverts.
PLATE XXXV.
1. Icterus auduboni. ♂ Tamaulipas, Mex., 4063.
2. Icterus wagleri. ♂ Guat., 8089.