1917.] Chapman, Distribution of Bird-life in Colombia. 463 



This form appears to be restricted to the Cauca Valley. Occupying 

 a region in which the humidity more nearly resembles that of Trinidad and 

 the Guianas than it does that of the arid coastal zone of northern South 

 America, the characters of caucensis in a degree parallel the resemblance 

 in climatic conditions existing between the Cauca Valley and northeastern 

 South America. 



Cah, 6; Florida, 1; Rio Frio, 1. 



(2996) Pitangus lictor (Licht). 



L[anius] lictor Light., Verz. Doubl, 1823, p. 49 (Pard). 



Saurophagus lictor Cass., Proo. Acad. N. S. Phila., 1860, p. 143 (R. Atrato; R. 

 Truando). 



Pitangus lictor Allen, Bull. A. M. N. H., XIII, 1900, p. 146 (Cacagualito). 



Boca de Chimi, lower Magdalena, 1. 



(3001) Sirystes albocinereus Scl. & Salv. 

 Sirystes albocinereus Scl. & Salv., P. Z. S., 1880, p. 1S6 (Bogotd). 

 Barrigon, 1. 



(3003) Myiodynastes maculatus nobilis Scl. 



Myiodynastes nobilis Scl., P. Z. S., 1859, p. 42 (Santa Marta); Wyatt, Ibis, 

 1871, p, 333 (Bucaramanga). 



Myiodynastes audax Scl. & Salv., P. Z. S., 1879, p. 514 (Sta. Elena; Frontino). 



Myiodynastes audax nobilis Allen, Bull. A. M. N. H., XIII, 1900, p. 145 (Bonda; 

 Minca; Cacagualito; Manaure; Valle Dupar; Santa Marta). 



A common species in the Tropical Zone. Our specimens have been 

 compared with a large series from Santa Marta, the type-locality. 



Alto Bonito, I; Dabeiba, 3; Puerto Valdivia, 3; La Manuelita, 2; 

 Chicoral, 3; Puerto Berrio, 2; Malena, I; Calamar, 2. 



(3005a) Myiodynastes luteiventris Scl. 

 Myiodynastes luteiventris ScL., P. Z. S., 1859, p. 42 (Orizaba, Mexico). 



A female taken at Chicoral in the upper Magdalena Valley, October 11, 

 is apparently typical of this species. It is interesting to note that Myiody- 

 nastes maculatus nobilis was also taken at Chicoral on October 11. 



Chicoral, 1. 



