COLE : AVES FROM YUCATAN. 121 



species there at all. My remembrance is, however, although I find no mention 

 of it in my notes, that both species were observed at Progreso. Stone (Proc. 

 Acad. Nat. Sci. Phila., 1891, 1890, p. 204) says the Turkey Vulture was occa- 

 sionally seen by him in Yucatan, but was nowhere common.] 



PALCONIDAE. 

 24. Micrastur melanoleucus (Vieillot) 



Maya name, kos or ek-plp. 



One specimen : 9 » March 1, 1904. 



Not uncommon. Usually seen in the vicinity of the cenotes. 



25 Asturina plagiata Schlegel. 

 Gray Buzzard- Hawk. 

 Maya name, l-kos. 

 Two specimens: 



a. £, March 24, 1904. 



b. 9, April 1, 1904. 

 Not uncommon. 



Iris dark. 



26. *Rupornis ruficauda griseicauda Ridgwat. 



Rupornis ruficauda (Scl. & Salv.). Chapman, Bull. Amer. Mus. Nat. Hist., 1896, 

 8, p. 286. 



Yucatan Gray-tailed Hawk. 



Maya name, kan-i-kos. Kan = yellow. 



Two specimens : 



a. 9, March 28, 1904. 



b. $, San Ignacio, Feb. 9, 1904. 



Like Chapman, I found this hawk not uncommon. 

 Iris lemon yellow. 



27. *Herpetotheres cachinnans (Linne). 



Crying Hawk. 



Maya name, kos. 



Heard nearly every morning and evening in several directions. Sometimes 

 heard before daylight in the morning and after dusk at night. The usual note 

 is a rather drawn-out cry, much like the human voice in distress; it sounds like 

 " Oh ! " at a rather high pitch, and with a slightly falling inflection at the end. 

 This is repeated at short intervals. Occasionally it gives a series of these cries, 

 increasing in pitch and volume somewhat, and becoming slower as it proceeds. 

 It may be represented roughly as follows : — 



Oh! Oh!' 



Oh! 

 Oh' 

 Oh! 



