(234 ) 



Adult. Agrees in all essential characters with T. c. griseipectus, but the 

 whole of the lower parts (except throat) is ashy grey, only the innermost sides 

 of the belly being much paler russet-brown. 



Material. 8 c?c?, 4 ? ? from the Caura (including the type), six in the 

 Munich, five in the Tring Museum. 



Eight males Wing 61-64 ; tail 50-55 ; bill 16J-18 mm. 



Four females Wing 56-58 ; tail 45-49 ; bill 15-16 mm. 



Observations. I am not very confident as to the distinctness of this form, 

 which additional material from intervening countries may prove to be inseparable 

 from T. c. griseipectus, although the twelve Caura specimens have certainly less 

 rnfescent-brown suffusion on the flanks. The alleged difference in the colour of 

 the lower mandible does not exist. The original describers were deceived by the 

 defective state of the Nauta specimens, all of which had lost the corneous tegument 

 of the bill. In fresh skins from Peru and Ecuador the under mandible is horny 

 grey, with lighter tip, exactly as in the Caura series. 



49. Cyclarhis atrirostris Scl. = Cyclarhis nigrirostris Lafr. juv. 



Cyclorhis nigrirostrisIjafresnaje^Rev. Zool. v. p. 133 (1842. "in Colombia," sc. Bogota). 

 Cyclorhis atrirostris Sclater, Ibis (5) v. p. 324. tab. x. (1887. Ecuador, Buckley coll., type in 

 British Museum). 



No 1. Mus. Brit. " cf juv. Camino de Manabi, Ecuador, C. Buckley coll. 

 e Museo Salvin and Godman." Type of C. atrirostris Scl. 



Wing 79 ; tail 67 ; bill 17 mm. 



The careful comparison of the type specimen with a large series from Colombia, 

 (Bogota, Antioquia) and Ecuador proves it to be a very young example of C. nigri- 

 rostris. Unmistakable signs of immaturity are the pale cinnamon tips to the 

 greater upper wing-coverts, the pointed rectrices, and the peculiar texture of the 

 feathers on the flanks and crissum. Moreover, the pileum is still covered with 

 the characteristic, fluffy, dull reddish cinnamon feathers of the nestling, which 

 extend, in a wide stripe, over the temporal region to the sides of the nape. Dr. 

 Sclater mistook these stripes for " superciliaries," while, in fact, they are but 

 remains of the juvenile plumage. The real superciliary streak, indicated by several 

 dark chestnut feathers, is by no means more extended than in average specimens of 

 C. nigrirostris, reaching as far as the posterior border of the eye. Newly-grown 

 feathers that are to be observed here and there between the rufous ones have 

 exactly the same colour as in adult C. nigrirostris, being cinereous on the forehead, 

 bright green on the crown and temporal region. The coloration of the under parts 

 agrees minutely with that of adult birds, except that the inner margin of the 

 remiges is somewhat brighter yellow. The bill lacks the abruptly defined pale 

 basal spot, the corresponding portion of the mandible being dark brown, but 

 slightly lighter than the black apical half. An immature Bogota skin in the 

 Munich Museum is intermediate in that respect. 



C. atrirostris must, therefore, be relegated to the synonymy of C. nigrirostris, 

 since constant differences between Ecuadorian and Colombian specimens do not 

 appear to exist. Generally birds from Bogota and Eastern Ecuador (Baeza) have 

 rather smaller bills than those from Western Ecuador (Gualea, Milligalli), but there 

 are numerous exceptions to these rales. In coloration they are perfectly alike. 

 Specimens from different localities average as follows : 



