1917.] Chapman, Distribution of Bird-life in Colombia. 627 



Even more puzzling than these two specimens from 5000 feet is an adult 

 male from an altitude of 2500 feet on the eastern slope above Florencia, 

 which has the yellow bill of neglectits and sincipitalis but in other respects 

 resembles angmtifrons! There is no indication of yellow on the forehead or 

 lores, but the underparts, particularly the thighs, are more olive than in 

 angustifrons. Possibly this is a hybrid between angustifrons and the form of 

 negledus found at Andalucia. 



Monteredondo, 1; Andalucia (5000 ft.), 2. 



(4453) Ostinops angustifrons {Spix). 



Cassicus angustifrons Spix, Av. Bras., I, 1824, p. 66, pi. Ixii ("In confinibus fl. 

 Amazonum"). 



Two specimens from above Villavicencio (alt. 3000 ft.) where the species 

 is common, are somewhat darker and have the bill slightly stouter and 

 straighter than others from "Napo.'' 



Inhabits the Tropical Zone at the eastern base of the Eastern Andes. 

 As above described, a specimen from above Florencia appears to be a hybrid 

 between this species and the form of neglectus found at Andalucia. 



Villavicencio, 2; La Morelia, 3; above Florencia (2500 ft.), 1, ap- 

 proaching neglectus. 



(4454) Cacicus cela {Linn.). 



Oriolus cela Linn., Syst. Nat., I, 1758, p. 191 (Guiana). 



Cassicus persicus auct. Allen, Bull. A. M. N. H., XIII, 1900, p. 163 (Cacagualito; 

 Santa Marta). 



Inhabits the Tropical Zone east of the Eastern Andes and also the Santa 

 Marta region (see remarks under the following species). 

 Barrigon, 8; Florencia, 5; La Morelia, 5. 



(4456) Cacicus vitellinus Lawr. 



Cassicus vitellinus Lawr., Proc. Acad. N. S. Phila., 1864, p. 107 (Panama). 



Cassicus icteronotus Cass., Ibid., 1860, p. 139, (Turbo; delta Atrato). 



Cassicus flavicrissus Wtatt, Ibis, 1871, p. 329 (Lake Paturia); Sol. & Salv., 

 P. Z. S., 1879, p. 509 (Remedies); Robinson, Flying Trip, 1895, p. 160 (R. Magda- 

 lena). 



In Colombia this species is known only from the humid Tropical Zone of 

 the lower Atrato Valley eastward to the Magdalena Valley. In the Santa 

 Marta region and east of the Eastern Andes it is replaced by Cacicus cela 

 (= persicus auct.) and in western Ecuador by C. flavicrissus, but although 



