392 Annals of the Carnegie Museum. 



gion. It was described from a single specimen obtained by Mr. Brown 

 in the neighborhood of Macotama, at an altitude of 9,000 feet. Mr. 

 Smith's collector took a second example on the San Lorenzo, as duly 

 recorded by Dr. Allen. The third known specimen was secured by 

 the writer on the very crest of this same mountain, at 8,300 feet alti- 

 tude, in some shrubbery on the sharp ridge. No others were ever 

 seen there, but two pairs were taken along the edge of the forest on 

 the Cerro de Caracas." All four of these were shot on the same day 

 (March 30, 1914), and the species was not encountered elsewhere, so 

 that it is evidently very rare. 



357.. Orodynastes striaticollis striaticollis (Sclater). 



Myiotheretes striaticollis Bangs, Proc. Biol. Soc. Washington, XII, 1898, 174 

 (MacOitama). — Bangs, Proc. New England Z06I. Club, I, 1899, 78 (El 

 Mamon). — Allen, Bull. Am. Mus. Nat. Hist., XIII, 1900, 152 (Bangs' 

 references). 



Orodynastes striaticollis columbianus Todd, Proc. Biol. Soc. Washington, 

 XXVI, 1913, 171 (San Lorenzo; orig. descr. ; type in coll. Carnegie Mus.). 



Thirteen specimens : San Lorenzo, Cerro de Caracas, San Miguel, 

 and Paramo de Mamarongo. 



Several of these have the two outer primaries abruptly emarginate 

 near their tips, and with but one exception this condition is correlated 

 with the shape of the dark area on the tail, which is cut squarely off. 

 This is not a sexual character, as suggested by Sclater, but probably 

 depends upon the age of the bird. 



The first specimens of this species received from the junior author 

 were described as a new race, on the ground of a slight difference in 

 color, which since the receipt of more ample material proves to be en- 

 tirely of a seasonal nature. July specimens are as a rule paler and 

 duller than those secured in March and April, but Ecuador specimens 

 run through the same range of variation. In the light of these facts 

 it is evident that the distinction sought to be established cannot be 

 maintained. 



On the San Lorenzo, where this species was first met with by the 

 writer, it was found only above 7,000 feet, in the deforested portion 

 and along the crest of the ridge, which supports only stunted trees and 

 shrubbery. In the Sierra Nevada, however, it was traced down to 

 about 5,000 feet, although rare below 8,000 or g,ooo feet. Its center 

 of abundance lies between 8,000 and 11,000 feet, while the highest 



