264 Proceedings of the Biological Society of Washington. 



black without white markings; a well-marked white superciliary; back 

 olive-brown, unstriped; the sides of the nape and neck grayer; ear-coverts 

 gray; a dusky postocular stripe; tail strongly graduated, brownish fuscous 

 margined with the color of the back and tipped with whitish; wing-quills 

 darker, the inner ones margined externally with the color of the back; 

 throat whitish; breast grayish; abdominal region and flanks pale sulphur- 

 yellow; under parts unmarked except for a slight suggestion of stripes on 

 the breast. Wing 54; tail 58; tarsus 18.5; culmen 11; width of bill at base 

 4.5 mm. 



Specimens examined. — Anazretes agraphia. Peru: The type. 



An&retes agilis. Colombia: near Bogota, 3; Valle de las Pappas, 1. 

 Ecuador: Mindo, 1; Gualea, 2; Pichincha, 1. 



Remarks. — This is the second known member of that section of the genus 

 Anwretes of which .4. agilis has heretofore been the only described species. 

 Compared with A. parulus these birds evidently possess well-marked 

 generic characters, but the differences in question are in part bridged by 

 A. nigricristatus in which the bill is broader, the tail more graduated, than 

 in parulus; while A. 'flavirostris is, in respect to these characters, intermedi- 

 ate between nigricristatus and parulus. 



Mionectes striaticollis columbianus, new subspecies. 



Subspecific characters. — Most nearly related to Mionectes striaticollis 

 poliocephalus (Tsch.) of Peru, but smaller; the upper breast olive-green 

 rather than gray; the white streaks of throat and breast much narrower 

 and more restricted; the plumbeous of the crown less extended, not reach- 

 ing back of nape or ear-coverts, cf, wing, 63-70; tail, 48-52 mm. 



Type.— No. 133,683, Am. Mus. Nat. Hist., <? ad., Sta. Elena, 9000 ft., 

 Antioquia, Colombia, November 21, 1914; Miller & Boyle. 



Specimens examined. — Mionectes striaticollis columbianus. Colombia: 

 Type locality, 1; east of Palmira, Cen. Andes, 1; El Roble, Cen. Andes, 2; 

 La Candela, Cen. Andes, 3; Cerro Munchique, W. Andes, 1; San Antonio, 

 W. Andes, 1; Subia, near Bogota, 1. 



Mionectes striaticollis poliocephalus. Peru: San Miguel Bridge, Uru- 

 bamba Canon, 3; Idma, above Sta. Ana, 6. 



Mionectes striaticollis striaticollis. Bolivia: Locotal, Prov. of Cocha- 

 bamba, 5; Yungas, Prov. Cochabamba, 4; Incachaca, Prov. Cochabamba, 

 2. 



Remarks. — The receipt of an adequate series of specimens of the Pe- 

 ruvian form of Mionectes striaticollis confirms my expressed belief that the 

 Colombian bird is separable from it (Bull. Am. Mus. Nat. Hist., XXXVI, 

 1917, p. 448). 



The extremes of variation are represented by the Bolivian bird at the 

 south, the Colombian bird at the north. Between these, but, as might be 

 expected, nearer the former than the latter, is the Peruvian form which 

 is sufficiently distinct from striaticollis to stand as a separate race, dis- 

 tinguished chiefly by its less streaked under parts, including the lower 

 tail-coverts. 



