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



(1470) Curucujus melanurus melanurus (Swains.). 



Trogon melanurus Swains., Anim. in Menag., Ill, 1838, p. 329 (Demerara, Brit. 

 Guiana). 



Two males from Florencia are slightly smaller than a male from British. 

 Guiana and have the bill less stout (see measurements under C. m. macrou- 

 riis), and in color they are somewhat more brassy above, but these differ- 

 ences are doubtless in part individual. 



Florencia, 2. 



(1471) Curucujus melanurus macrourus {Gould). 



Trogon macroura Gould, Monog. Trog. Ed. 1, 1838, pi. 17, (" Mexique" ; Caracas, 

 Venezuela). 



Trogon macrourus Cassin, Proc. Acad. N. S. Phila., 1860, p. 135 (Rio Truando; 

 delta Atrato). 



Trogon macrurus, Scl. & Salv., P. Z. S., 1879, p. 535 (Remedios and Nech6). 



Inhabits the humid Tropical Zone of the Atrato and Magdalena Valleys. 

 When he described this bird Gould was evidently unaware of its range, but 

 in the second edition of his Monograph of the Trogons (1875) he writes: "I 

 doubt whether it is to be found beyond the district included between the 

 lower region of the river Magdalena and the Isthmus of Panama as far as 

 the base of the mountainous region of Veragua." So far as Colombia is 

 concerned, this statement is approximately correct but the species does not 

 appear to have been recorded from west of the Canal Zone in Panama. 

 Singularly enough the west Ecuadorian form of this species is, or is very 

 near, C. m. melanurus of Amazonia. 



Some difficulty is experienced in distinguishing females of macrourus 

 from females of C. massena australis, but macrourus has a relatively longer 

 tail which is longer instead of shorter than the wing, the bill is usually 

 shorter- and relatively narrower, and the wing-coverts and inner wing-quills 

 are as a rule more strongly vermiculated with white than in australis, some 

 individuals of which are wholly without these white markings on the wings. 



R. Salaqui, 2; R. Atrato, 2. 



(1472) Curucujus massena australis Chapm. 



Curucujus massena australis Chapm., Bull. A. M. N. H., XXXIV, 1915, p. 384, 

 (Barbacoas, Col.). 



fTrogon massena Cass., Proc. Acad. N. S. Phila., 1860, p. 135 (R. Truando; delta 

 Atrato); Hellm., P. Z. S., 1911, p. 1193 (Noanamd). 



