FAMILY FURNARIIDAE 75 



feet" in the original description seems to be wrong as both the type 

 and the female taken with it have the labels marked 5,500 feet 

 (1675 meters). The race was named for Rudyerd Boulton, Griscom's 

 companion on the expedition during which it was collected. 



In the original description Griscom mentions a specimen in the 

 British Museum, a male, collected by Arce in "the mountains back of 

 Calobre," a specimen that I have examined. In February and March 

 1924, Benson secured a male and four females near Chitra, Veraguas, 

 at 1220 to 1340 meters elevation. 



PREMNOPLEX BRUNNESCENS (Sclater) : Spotted Barbtail, 

 Fafao Punteado 



Figure 7 



Margarornis brnnnesccns P. L. Sclater, Proc. Zool. Soc. London, pt. 24, June 

 16, 1856, p. 27, pi. 116. (Bogota, Colombia.) 



Small, but rather robust ; dark olive-brown, heavily spotted with 

 dull white to buff on under surface. 



Description. — Length 135-145 mm. Outer rectrix much less than 

 half the total length of the tail. Adult (sexes alike), crown and 

 hindneck olive to grayish olive, the feathers edged with dusky ; fore- 

 head spotted or streaked with bufif ; rest of dorsal surface dull brown, 

 with faintly indicated edgings of dusky ; upper back and scapulars 

 in some with shaft lines of pale buflf ; some also with the wing coverts 

 spotted with buff, tipped with black ; wings somewhat more reddish 

 brown ; tail dark dull brown, verging toward black ; lores, and the 

 slightly marked superciliary line, buff ; side of head dusky-gray lined 

 with pale buff; chin and throat deep buff, the feathers margined 

 lightly with dusky ; rest of under surface olive, spotted and lined 

 heavily with buff to huffy white with dusky margins, the light mark- 

 ings largest on the center of the breast ; under tail coverts more 

 reddish brown ; under wing coverts pale buff to grayish white ; a 

 slight cinnamon edging on inner webs of primaries and secondaries. 



As a species this bird is widely distributed in mountain forests 

 from Costa Rica through Panama to Colombia, northern Venezuela, 

 Ecuador, Peru, and Bolivia. Through the present study, based on 

 larger series of specimens than available earlier, two forms are 

 recognized in Panama. Typical hrunnescens, ranging in the Andes 

 of Colombia south to Peru, compared to the populations of Panama, 

 is darker above, with the crown more olive, the tail blacker, and the 



