TVIiANNIU.E — TIIK FLYCATrilEUa 305 



H griseipectus.* Colors of hmnnondi hut win^'-bands whiter and 

 narrowor, very sharply dfliiuMl; sidrs tiii«.'t*d with cK-ar grt'cnish ; 

 jujruhim and sidrs of throat cU-ar ashy. Wing, 1*.40 ; tail, li.40 ; bill, 

 .56 and .27 ; tarsus, .00; middle tou, .35. ILil>. G nay at^uil, Ecuador. 



IT. Tdll sijunre^ or ditjhtly romnleif ; feathers acute at tips. 

 E. pusillus. IJrownish-olivc or ohvx-i^ray above, wing-bands olive 

 or gray ; beneath whitish, with a grayish shade across the breast, and 

 a sulphur-yellow tinge posteiiorly. 



Olive-grayish above, wing-l)ands much lighter, or whitish-gray. 

 Wing, 2.!>0; tail, 2.70; bill, .01) and .20; tarsus, .07; middle toe, 

 .40. Hah. Western Province of North America, and Middle 



and Western Mexico var pusillus. 



Brownish-olive above, wing-bands but little lighter. Wing, 2.1M>: 

 tail, 2.50; bill, .04 and .27 ; tarsus, .00: middle toe, .38. Hah. 

 Eastern Province of North America, and Eastern Mexico . var. trailli. 



§. Young icith upper phimaqe transversely mottled. Wing-bnuds u'ith a 

 pale buff tinge; upper vuindible brown. 



E. acadicus. Grayish-green above, greenish-white beneath ; throat 

 purer white. Wing, 3.10; tail, 2.80; bill, .07 and .30; tarsus, .00; 

 middle toe, .34. Ilab. Eastern Province of United States, and Eastern 



Mexico var. acadicus. 



Wing, 2.05 ; tail, 2.50 ; bill, .00 anrl .30 ; tarsus, .02 ; middle toe, 

 .33. Wing-bands whiter. Ilab. Panama . \a.v. gr iseigularis } 



In Empidonar, as well as Contopvs, autumnal birds have the plumage 

 softer and the colors biightei than in spring; the la'illiancy of the yellow 

 shades is especially enhanced. The young of the year resemble the parents, 

 but there is a fjreater tendency to li<xht bands on the winjjjs, which with the 

 other markings of this region show an ochraceous tinge. The lower mandi- 

 ble is also usually tinged with ilusky. In the young of E. acadica, alone, 

 there are light transver.se bars over upper surface, as in the young of some 

 species of Contopus {C. hahamcnsis and C. puncnsis). 



^ Enipiilnnax griscipccfus, Lawii. jVIay possibly ho another seasonal plumage of the same 

 species as pectoralis, but differs in some seemingly important respects. 



2 Empidonax acadicus, var. grisciijularis. Empidonax grisciijularis, Lawr. Differing from 

 acadicus only in smaller size and whiter wing-bands. 



The remaining described American species of Empidonax, which we have not seen, are the 

 following : — 



Empidonax magnirostria, Gould, Voy. P>eagle, pi. 8. — Gr.AY, Hand List. 



Empidonax aJhigularis, Sclater & Salvin, Ibis, 18.'»9, p. 122 (OrizabaV — Sn.ATER, Cutal. 

 Am. B. 1862, 229. This may possibly be the species described above as E. axillaris. 



