18 REVIEW OF THE GENUS XIPHOCOLAPTES RIDGWAY. 



on the throat through deep russet on the under surface of the body, 

 where strongly tinged with rusty chestnut to deep chestnut on the under 

 tail-coverts; chest, breast, upper belly, and anterior portion of sides with 

 narrow mesial streaks or shaft-streaks of pale tawny, the middle of the 

 belly showing a few, hardly discernible, faiut bars of dull brownish; axil- 

 laris and under wing-coverts rufous-tawny. Bill horn color, paler at tip 

 and on tomia and gonys; legs and feet horn-dusky. Length (skin), 

 12.80; wing, 5.70; tail, 4.70; culmen, 2.20; depth of bill at angle, .38; 

 tarsus, 1.30; middle toe, 1.08. 



There can be no doubt of the distinctness of the Bolivian bird from 

 that of Paraguay and Buenos Ayres, at least as a well-marked geograph- 

 ical race. The description and colored plate in the Exotic Ornithology, 

 "taken from a specimen in Sclater's collection, believed to be from 

 Bolivia," agree very closely with the example described above. 



The following species I have not seen : 



(1) Xiphocolaptes simpliciceps Lafr. 



Dendrocolaptcs slmplidceps "Pucheran et Lafresnaye, in Mus. Parisiense," Lafr., Rev. 

 et Mag. Zool., 1850, 100 (Yungas, Bolivia). 



Sp. Char. — "Above immaculate olive-brown, the head and neck uni- 

 colored ; wing, rump, and tail cinnamon, the tail more intense; beneath 

 same color as the back, but paler, the whole throat, superciliary stripe, 

 another beneath the eyes, and extremely narrow oblong spots on the 

 upper lateral portion of the head and on the breast, white, slightly 

 tinged with ochraceous; middle of the belly and anal region paler, 

 spotted with black, as if banded ; the under wing-coverts yellowish 

 ochraceous, distantly streaked with black ; remiges brown or chestnut, 

 black at tips. 



" Habit. — Yungas, collected by M. d'Orbiguy." (Lafr., I. c; trans- 

 lation.) 



The most obvious character of X. sin^licicejys consists in the entire 

 absence of streaks on the pileum and hind-neck, in which respect it 

 differs from every other known species of the genus excepting the other- 

 wise very different X. major and X. castaneus ; otherwise it seems to 

 agree quite nearly with X. compressirosP'is,* in which the streaks on the 

 head and neck above are narrower than in allied species. 



(2) Xiphocolaptes lineatocephalus Gray. 



Dendrocolaptes lineatocephalus Gray, Geu.B., i, 1847, pi. 43. 

 Dendrocops lineatocephalus Boxap., Consp., i, 1850, 207. 

 Xiphoeolaj)tes lineatocephalus Gray, Hand-]., I, 1869, 176, No. 2u87. 



No description is given of this bird, neither is any habitat assigned 

 to it. In the " Hand-list," however, the habitat is given as Bolivia, while 

 " promeropirhynclt us, p., Sclat." is given as a synonym. It is doubtless 

 one of several forms included by some authors under the comprehensive 



* Lafresnaye (I. c.) compares it with X. promcropirlujnclius, X. compresslroulris being 

 then unknown. 



