^"I's^'^l Obkriiolser, jYc-m Suhspecies of Dcndroica. 77 



oribits ; auricularihus, colli cafitisqiie hiteribus magis oUvacco-viridi 

 lavaiis ; nccnon rcmigibtis cum alarum tcctrkihus superioribus minus con- 

 spicue Jlavido marginatis. 



Al., 61.5-65.3 (63)111111; caud., 43.2-47.2 (44.4) mill.; exp. culm., 9.4- 

 10.4 (.9.9) mm ; tars., 17.3-19-3 (i8-3) mm. 



Habitat. — Alaska et Columbia Hritannica. ^ 



De.scription. — Male, adult, No. 131807 U.S. Nat. Mus.; Kadiak Island, 

 Alaska, June 7, 1893 ; C II. Townsend. Above olive green, somewhat more 

 yellowish on crown, auriculars, rump and sides of neck, but with no well- 

 defined yellow crown-patch. Longest feathers of the superior tail-coverts 

 with central portions olive brown. Lores, orbital ring, conspicuous 

 superciliary stripe and lower parts, pure gamboge yellow, slightly shaded 

 with olive green on sides, which, together with jugulum and breast, are 

 streaked, with brick red as in morcomi. Wings dark olive brown, the lesser 

 coverts like the back, the median, greater and primary coverts, with outer 

 margins of remiges, edged witli yellowish olive green ; the inner margins 

 of the last broadly canary yellow at base, this color decreasing in amount 

 toward the ends of the feathers. Axillars and under wing-coverts lemon 

 yello^v. Tail-feathers dark olive brown, the inner webs broadly lemon 

 yellow, this color on the outer pair occupying all but a terminal guttate 

 spot, and diminishing in extentoneach succeeding pair, until it disappears 

 entirely from the two middle rectrices; basal two-thirds of external web of 

 outermost pair also lemon yellow. Outer edges of all the rest, including 

 lioth margins of two middle feathers, narrowly olive green. 



Typical Dendroica ce'stiva rubiginosa differ.s from D. ce. tnorcomi 

 most noticeably in its darker, less yellowish and almost uniform 

 upper parts, the crown and rump being not in appreciable contrast 

 to the olive green of the back. In consequence of the olivaceous 

 color of the whole pileum, both the yellow eye ring and super- 

 ciliary stripe are much more clearly indicated. Minor characters 

 exist in the more olivaceous tint of the auriculars and sides of the 

 neck and head ; also in the duller, sometimes scarcely yellowish 

 external edging to wing-quills and their coverts. The color below 

 averages slightly paler, especially on the throat and the lower 

 tail-coverts, though upon examination of a larger series this may 

 prove merely an individual variation. There seems to be no 

 material difference in size. From Dendroica cestiva the present 

 form is further separable by the narrower streaking of the breast. 



The characters here ascribed to rubiginosa are remarkably con- 

 stant in all of the six adult males from Alaska, though a specimen 



