(var. ?) pectoralis.[94]
Wing, 2.35; tail, 2.20; bill, .54 and .25; tarsus, .62; middle toe, .33. Colors of minimus, but wing-markings whiter. Hab. Panama.
E. griseipectus.[95] Colors of hammondi, but wing-bands whiter and narrower, very sharply defined; sides tinged with clear greenish; jugulum and sides of throat clear ashy. Wing, 2.40; tail, 2.40; bill, .56 and .27; tarsus, .60; middle toe, .35. Hab. Guayaquil, Ecuador.
¶. Tail square, or slightly rounded; feathers acute at tips.
E. pusillus. Brownish-olive or olive-gray above, wing-bands olive or gray; beneath whitish, with a grayish shade across the breast, and a sulphur-yellow tinge posteriorly.
Olive-grayish above, wing-bands much lighter, or whitish-gray. Wing, 2.90; tail, 2.70; bill, .69 and .26; tarsus, .67; middle toe, .40. Hab. Western Province of North America, and Middle and Western Mexico … var. pusillus.
Brownish-olive above, wing-bands but little lighter. Wing, 2.90; tail, 2.50; bill, .64 and .27; tarsus, .66; middle toe, .38. Hab. Eastern Province of North America, and Eastern Mexico … var. trailli.
§. Young with upper plumage transversely mottled. Wing-bands with a pale buff tinge; upper mandible brown.
E. acadicus. Grayish-green above, greenish-white beneath; throat purer white. Wing, 3.10; tail, 2.80; bill, .67 and .30; tarsus, .60; middle toe, .34. Hab. Eastern Province of United States, and Eastern Mexico … var. acadicus.
Wing, 2.65; tail, 2.50; bill, .66 and .30; tarsus, .62; middle toe, .33. Wing-bands whiter. Hab. Panama … var. griseigularis.[96]
In Empidonax, as well as Contopus, autumnal birds have the plumage softer and the colors brighter than in spring; the brilliancy of the yellow shades is especially enhanced. The young of the year resemble the parents, but there is a greater tendency to light bands on the wings, which with the other markings of this region show an ochraceous tinge. The lower mandible is also usually tinged with dusky. In the young of E. acadica, alone, there are light transverse bars over upper surface, as in the young of some species of Contopus (C. bahamensis and C. punensis).