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



■these three forms are evidently representative of one another the facts at 

 hand indicate that they do not intergrade. 



It should be particularly noted that from the Pacific coast region no 

 form of this species has been recorded between the River Salaqui and Esmer- 

 aldas. Aside from its larger size, more orange rump, etc., and smaller 

 amount of orange in the wing, mtellinus differs from flavicrissus in its con- 

 spicuously larger bill which, in color, is yellowish ivory or greenish white 

 rather than dark plumbeous paler terminally. 



In the extent of orange or yellow in the tail both agree, and differ from 

 C. cela in having the outer feathers with essentially the same amount of 

 yellow as the inner ones; while in cela this color occupies at least the basal 

 two-thirds- of all but the central pair of feathers. 



A male from Algodonal, on the lower Magdalena River has the orange 

 areas slightly paler but in other respects agrees with the type of mtellinus, 

 while a male from Cacagualito in the Santa Marta region is equally typical 

 of C. cela. 



R. Salaqui, 1; Algodonal, 1. 



(4458) Cacicus leucorhamphus (Bonap.). 



Xanthomus leucorhamphus Bonap., Att. So. Ital., 1843, p. 404 (Bogotd). 

 Cassicus leucorhamphus Sol. & Salt., P. Z. S., 1879, p. 509 (Envigado; Con- 

 cordia; Sta. Elena). 



Inhabits the Temperate Zone of all three ranges descending locally to 

 the upper part of the Subtropical Zone. It appears to be a zonal represen- 

 tative of the Caucus cela group. 



Andes w. of Popayan, 1; Almaguer, 3; Laguneta, 8; El Eden, 3; 

 Subia, 2. 



(4460a) Cacicus haemorrhous affinus Swains. 



Cassicus affinis Swains., Eds. Brazil, pi. 2. 



Reaches the Tropical Zone of Amazonian Colombia from which country 

 it does not appear to have been before recorded. Our specimens agree with 

 others from Guiana. This species may be considered the Tropical Zone 

 ancestor of C. uropygialis. 



Florencia, 1; La Morelia, 1. 



: V 



(4463) Cacicus uropygialis uropygialis Lafr. 



Cassicus uropygialis Lape., Rev. Zool., 1843, p. 290 (Colombia = 'Bogota,'); 

 Sol. & Salv., P. Z. S., 1879, p. 509 (Jerioo). 



