152 Annals of the Carnegie Museum. 



toco specimen was shot near the same marsh where Falco fuscocccrules- 

 cens fuse ocaerulesc ens was found, and at Fundacion two were taken 

 along the edge of the big marsh. Its local range is probably the low- 

 lands around the Cienaga Grande and lower Magdalena Valley. It 

 appears to be unknown in the interior of Colombia. 



42. Morphnus urubitinga (Gmelin). 



Urubitinga zonura Allen, Bull. Am. Mus. Nat. Hist., XIII, 1900, 130 (Bonda). 



Additional records: Fundacion (Univ. Mich. Exp.). 



Three specimens : Bonda, Neguange, and Don Diego. 



For the use of this generic name in place of Urubitinga compare 

 Opinion 62 of the International Commission on Zoological Nomen- 

 clature {Smithsonian Institution Publication No. 2256, 1914, 147). 



The series examined fails to show any indications of intergradation 

 between M. urubitinga and M. ridgzvayi of Central America, which 

 we would therefore keep specifically distinct. 



A common bird along the coast and the shores of the Cienaga 

 Grande, and found inland also to some extent, but only along the 

 streams. Its food consists largely of shell-fish and crabs washed up 

 on the beach. 



43. Morphnus anthracinus anthracinus (Nitzsch). 



Urubitinga anthracina Sclater, Proc. Zool. Soc. London, 1858, 129, in text 

 (cf. footnote) ("Santa Marta"). — Salvin and Godman, Ibis, 1880, 177 

 (Santa Marta). — Allen, Bull. Am. Mus. Nat. Hist., XIII, 1900, 130 

 (Bonda). 



Fourteen specimens : Bonda, Playa Concha, and Cinto. 



Adults differ from two specimens from British Honduras in having 

 the feathers of the back with concealed buffy white bases, but whether 

 a series of northern birds would bear out this difference remains to 

 be seen. As this character is one of those upon which Mr. Clark re- 

 lies for separating the bird from the Lesser Antilles, called by him 

 cancrivora (Proceedings Biological Society of Washington, XVIII, 

 I 9°5» 63), further comparisons are naturally desirable. Mexico is the 

 type-locality, and the only other available name for the southern form, 

 if valid, is Urubitinga subtil is Bangs (Bulletin Museum of Compara- 

 tive Zoology, XLVI, 1905, 94). The relative position and width of 

 the white tail-band appears to be subject to considerable variation in 

 the series examined, but the variation in question seems to be purely 

 individual. 



