336 Bulletin American Museum of Natural History. [Vol. XXXVI, 



ORDER PICIFORMES. 

 Family GALBULID^. Jacamaes. 



(1586) Galbula ruficauda ruficauda Cuv. 



Galbula ruficauda Cuv., Regn. An., I, 1817, p. 420 (Guiana) ; Cass., Proo. Acad. 

 N. S. Phila., 1860, p. 134 (R. Nercua); Scl. & Salv., P. Z. S., 1879, p. 535 (Frontino); 

 Robinson, Flying Trip, p. 157 (R. Magdalena); Stone, Proc. Acad. N. S. Phila., 

 1899, p. 305 (Honda; Ambalema). 



Found by us only in the Tropical Zone of the humid portion of the Lower 

 Cauca and Magdalena Valleys, where it replaces G. r. pollens of the lower, 

 more arid parts of the same valley. Thirteen males and ten females seem 

 wholly to agree in color with ten males and five females, from northeast 

 Venezuela, Trinidad and Tobago. As a Tropical Zone species the birds of 

 the Honda region are shut off on the east by the Eastern Andes, while at 

 the north their range appears to be bounded by that of G. r. pallens with 

 which our series apparently shows they intergrade. Should an arm of the 

 humid zone pass through the Valle Dupar to the Maracaibo region we enter 

 the range of 6. r. brevirostris, which, according to Cory's measurements, has 

 a shorter bill than any bird in our series. Additional specimens from Vene- 

 zuela and from northeastern Colombia are needed to solve this interesting 

 problem in distribution. 



Puerto Valdivia, 3; Puerto Berrio, 2; Honda, 5; 20 miles west of Honda, 

 13; Chicoral, 2. 



(1587) Galbula ruficauda pallens Bangs. 



Galbula ruficauda pallens Bangs, Proc. Biol. See. Wash., XII, 1898, p. 133 (Santa 

 Marta, Col.). 



Galbula ruficauda ■pallida Allen, Bull. A. M. N. H., XIII, 1900, p. 135 (Cienaga; 

 Bonda). i 



Three males and two females from Calamar, on the lower Magdalena, 

 agree in color with eleven topotypical specimens of this well-marked form 

 but have the bill slightly shorter. Two males from Banco, where the arid 

 coastal zone merges into the humid zone of the lower central Magdalena Val- 

 ley, are intermediate in color, between pollens and ruficauda, and indicate 

 their intergradation. From ruficauda, pallens may be distinguished by its 

 paler rufous areas particularly in the female (the sexual difference being 

 more marked in pallens than in ruficauda), narrower pectoral band and 



