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



(2930) Tyranniscus cinereiceps {Scl.). 

 Tyrannvlus cinereiceps Scl., P. Z. S., 1860, p. 69 (Pallatanga, Ecuador). 



I refer to this species, of which I have seen no authentic specimens, 

 four specimens from the Central Andes. One from below Salento and 

 one from Sta. Elena agree with each other and descriptions of the species, 

 being as bright below and somewhat brighter above than T. nigricapilltis. 

 But one from above Salento, and one from El Eden, are much duller more 

 grayish below and much darker, more olive-grayish above. The El Eden 

 specimen is obviously immature, the other appears to be adult; and al- 

 though it agrees with the two birds first mentioned in every detail of pat- 

 tern and size, differs so conspicuously in its less yellow more grayish color, 

 that it is difficult to believe they are conspecific. Nevertheless, I pro- 

 visionally refer it and the El Eden specimen to cinereiceps. 



Below Salento, 1; above Salento, 1?; Sta. Elena, 1; El Eden, 1? 



(2937) Tyranniscus chrysops chrysops (Scl.). 



Tyrannvlus chrysops Scl., P. Z. S., 1858, p. 458 (Gualaquiza, Ecuador). 



Tyranniscus flavifrons Cab. & Hbin., Mus. Hein., II, 1859, p. 58 (New Grenada = 

 Bogotd). 



Tyranniscus chrysops Wtatt, Ibis, 1871, p. 333 (Herradura; Pirico; Naranjo); 

 ScL. & Salv., p. Z. S., 1879, p. 513 (Retire; Concordia; Sta. Elena). 



Appears to be rare on the Pacific Coast but occurs throughout most 

 of the remaining territory explored by us chiefly in the Subtropical Zone, 

 but ranging upward' to 9000 ft. at Sta. Elena. Our series of forty-six speci- 

 mens confirms the existence of a small race {T. c. minimus, Bull. A. M. N. 

 H., 1912, p. 153) of this species but indicates that it is not confined to the 

 Santa Marta region but may occur in the Tropical Zone of the lower Cauca 

 and Magdalena Valleys. We have not, however, a sufficient number of 

 specimens to solve this problem in distribution which is rendered compli- 

 cated by the large amount of sexual variation in size shown by this species. 

 This makes accurate sexing of specimens of the first importance and in 

 default of a satisfactorily sexed series from the Caribbean region as well 

 as from Ecuador, I can make no attempt to define the ranges of the large 

 and small forms of this species. Specimens from the west Bogota region 

 are somewhat larger than others from Ecuador and appear to have the 

 frontlet brighter yellow, but four birds from what we may call the east 

 Bogota region (Villavicencio) agree with the Ecuadorian examples both in 

 color and size. There seems, therefore, to be no reason for recognizing a 

 Bogota form. 



