1917.] Chapman, Bistrihuiion of Bird-life in Colombia. 345 



(1654) Monasa pallescens pallescens Cass. 



Monasa pallescens Cass., Proo. Acad. N. S. Phila., 1860, p. 134 (R. Truando); 

 Hellm., p. Z. S., 1911, p. 1197 (Juntas, Rio Tamanii). 



This form appears to be restricted to the Atrato and upper San Juan 

 Valleys. There is considerable variation in intensity of color particularly 

 of the wing-coverts in our ten specimens. 



Salaqui, 1; Iguamiando, 1; Baudo, 3000-3500 ft., 4; Alto Bonito, 4. 



(1655) Monasa pallescens sclateri Ridgw. 



Monasa sclateri Ridgw., Proo. Biol. Sob. Wash., XXV, 1912, p. 89 ("Bogotd"). 

 Monasa pallescens Wyatt, Ibis, 1871, p. 374 (Paturia); Scl. & Salv., P. Z. S., 

 1879, p. 536 (Remedios; Neoh6). 



Inhabits the humid Tropical Zone in the lower Cauca and Magdalena 

 Valleys. Comparison of thirteen specimens, with six topotypical examples 

 of M. p. 'pallescens clearly indicates that sclateri is a race of pallescens dis- 

 tinguished only by its darker coloration, chiefly of the wing-coverts. 



Puerto Valdivia, 7; 20 miles west of Honda, 6. 



(1656) Monasa nigrifrons (Spdx.). 



Bucco nigrifrons Spix, Av. Bras., I, 1824, p. 53, pi. xli, fig. 2 ("In sylvis flum. 

 SolimoSns"). 



Like M. m. peruana this species was found only in southeastern Colom- 

 bia. Our specimens agree with others from Napo and Chapada, Matto 

 Grosso. 



La Morelia, 6. 



Family PICID^. Woodpeckers, Piculets. 



(1665) Hypoxanthus rivolii rivolii (Boiss.). 



Picus rivolii Boiss., Rev. ZooL, 1840, p. 36 (no locality — I suggest Chipaque, 

 alt. 9500 ft., 15 miles e. of Bogota). 



This form appears to be restricted to the Eastern Andes where it occurs 

 chiefly in the Temperate Zone. Seven specimens differ from specimens 



