364 NORTH AMERICAN BIRDS. 



2.60; tail, 2.35, or Ie.s.e ; bill, .57 and .27: tai-sus, .6G ; middle toe, 

 .37. Hab. Eastern Province Xortli America, south through East- 

 ern Mexico to Guatemala ..... var. Jlaviveniris . 

 Dull olive-gray above, pale, somewhat ochraoeous, yellow beneath ; 

 wing-bands grayish-white ; lining of ^'ing strongly tinged with 

 fulvous. Wing, 2.75; tail, 2.60 to 2.75. Hab. Western Province 

 of North America, south, through Western Mexico, to Colima. 



var. di/ficili li. 

 E. fulvipectus.' Bill narrow, the width but little more than the 

 depth, and the culmen considerably more than twice the breadth at 

 base. Outer web of lateral tail-feather distinctly whitish, very different 

 from the dusky of the inner web. Tail deeply emarginated. Colors 

 o[ flaviventris var. difficilis, but wing-bands broad and bulTy olive, and 

 a deep shade of fulvous-olive across the breast. Wing, 3.00 ; tail, 2.90 ; 

 bill, .61 and .22 ; tarsus, .60 ; middle toe, .37. Ilab. City of Mexico. 

 b. Grayish or greenish olive above, whitish beneath. 



IT. Tail deeply emarginated. 



E. obscurus. Exact form and proportions oi fulvipectus, but tarsus 

 much longer proportionally. Ashy above, with a slight olive tinge ; 

 white beneath with no yellow tinge, and without distinct ashy shade 

 across breast ; sides of breast like the back. Orbital ring, wing- 

 markings, and outer web of lateral tail-feather pale clear ashy. Wing, 

 3.0O: tail, 2 SO ; bill, .64 and .24; tarsus, .77 ; middle toe, .42. 

 E. hammondi. Very similar, but bill much smaller and less elongated. 

 Color of upper parts the same as in obscurus ; but anterior lower parts 

 nearly uniform ashy, the throat only indistinctly paler, and the posterior 

 portions distinctly uniform pale sulphur-yellow. Outer web of lateral 

 tail-feather less distinctly whitish. Wing, 2.85 ; tail, 2.55 ; bill, .50 and 

 .20 : tarsus, .64 ; middle toe, .34. 



E. minimus Very similar to hammondi, but bill much larger, broader, 

 and the lateral outlines less straight. Outer web of lateral tail-feather 

 not appreciably paler than the inner ; whole throat distinctly whitish ; 

 wing-bands only about half as wide as in hammondi. 



Wing, 2.70 ; tail, 2.60 ; bill, .57 and .27 ; tarsus, .66 ; middle toe, 

 .35. Hab Eastern Province of North America, and Eastern 

 Mexico ......... var. minimus. 



1. Tail donbly rounded. 



Wing, 2.35 ; tail, 2.20 ; bill, .54 and .25 ; tarsus, .62 ; middle toe, 

 .33. Colors of minimus, but wing-markings whiter. Hab. 

 P.anama (vht. ?) jjeci oral is.' 



■■ Empi'kmaxfulvipccfus, L.vwn. Ann. N. Y. Lye. Feb. 1871, 11. (Type examined.) A very 

 distinct siiecies, nio.st nearly related to obscurus, from which it differs totally in color and in 

 iiiuc'h shorter tar.sus. 



- Empidonnx minimus, var. pcclomlis. Empidonax pcctoralis, Lawr. It seems but reason- 

 able to consider this bird as the southern race of minimus, as the differences — i. e. smaller size 

 and whiter wing-hands — are just what we find in several other species of the same region, 

 compared with allied and probably co-specific northern tj-pes, — as griseiijularis and acadicus, 

 southern specimens of traiUi var. pusillus in which the wing-bands are much whiter than in 

 northern specimens of the same bird. 



