498 PROCEEDINGS OF THE ACADEMY OF [Oct., 



Dutch Guiana through the Orinoco valley (P. c. guanensis), but later 

 (XIV, p. 35) he considers the difference not constant, in which opinion 

 I heartily agree. 



Specimens examined from Guiana — Cayenne, Annai, Surinam; 

 Venezuela — Maupa, Suapure, Lourde 1700 m. 



Piaya cayana oolumbiana (Cab.). 



Pyrrhocorax columbianus Cabanis, Jour. f. Orn., 1862, p. 170 [Cartagena, 



Colombia]. 

 Pyrrhocorax mesurus Cabanis and Heine, Mus. Hein., IV, 1862, p. S3 [Bogota]. 



Length of wing, 5.65; tail, 11.85; length of culmen, 33 mm.; height, 

 12.5 mm. 



Above ferruginous, slightly paler on the head, tail and ends of wings, 

 with a gloss of ^dne purple in certain lights, flanks and crissum as in 

 cayana; under side of retrices rusty, more or less minutely flecked or 

 watered with black on the inner webs, broad, well-defined subterminal 

 black bands and white tips. 



This bird is indistinguishable from mexicana above, and differs below 

 only in the greater amount of black shading on the rectrices ; the greatest 

 difference is found in the much larger bill. Bogota specimens have a 

 still greater amount of black on the under side of the rectrices. 



Specimens exaixiined from Colombia — Santa Marta, Bonda, Bogota; 

 Venezuela — Cumanacoa, El Pilar, Valencia, Macuto, Santo Domingo, 

 2,000 m. 



Piaya cayana insulana Hellmayr. 



Piaya cayana insulana Hellmayr, Nov. Zool., XIII, p. 40 [Trinidad]. 



Length of wing, 5.58; tail, 9.30. 



Above ferruginous with a slight chestnut tint, closer in color to 

 columbianus and mexicanus than to cayana, tail rather darker with a 

 purplish gloss, thighs and crissum as in cayana. Under side of rectrices 

 dull black, the outermost one rusty on outer vane near the quill for 

 two-thirds of its length, the others largely rusty on the outer vane 

 except for a subterminal black area, some of them rusty, in certain 

 lights at least, on parts of the inner web, which helps to bring out an 

 obscure ill-defined subterminal band. 



Specimens examined from Trinidad. 



Piaya cayana mexicana (Swains.). 



Cuculus mexicanus Swainson, Pliilos. Mag., I, p. 440, 1827 [Tableland of 

 Temascaltepec]. 



Length of wing, 5.90; tail, 12.65. Length of culmen, 30 mm.; 

 height, 10 mm. 



Above ferruginous with wine purple reflections on the tail and ends 



