1917.] Chapman, Distribution of Bird-life in Colombia.' 425 



specimens from Esmeraldas, Chone, Naranjo, and Santa Rosa, Ecuador. 

 In one (four specimens) the color, particularly below, is more rufescent and 

 the black markings of the crown and underparts are less pronounced. The 

 other (seven specimens) is more olivaceous, the median stripes of crown 

 and underparts are somewhat paler and their borders blacker. Both types 

 are present at Esmeraldas and both contain representatives of both sexes. 

 The Buenavista specimen belongs to the darker type as does also the speci- 

 men from Santa Rosa. The variation appears therefore to be. individual. 



While doubtless a representative of the trochilirostris type this form 

 appears to me to be now specifically distinct. The form of trochilirostris 

 {C. t. procurvoides or a near ally) nearest to it geographically resembles it 

 least, while the occurrence of pusillus at Barbacoas in the same faunal zone 

 as Buenavista, whence comes our Colombian specimen of thoracicus, indi- 

 cates its distinctness from that species. 



Buenavista, Narino, 1. 



(2607a) Campylorhamphus pusillus (ScL). 



Xiphorhynchus pusillus i Sol., P. Z. S., 1860, p. 278 ("In Nov. Granada int." = 

 Bogotd, Cf. Cat. B. M. XV, p. 101); Scl. & Salv., P. Z. S., 1879, p. 524 (Concordia). 



fCampylorKamphus chapmani Ridgw., Proc. Biol. Soc. Wash., XXII, 1909, p. 74 

 ("unknown locality"). 



This well-marked species is typically represented by a specimen from 

 Fusugasuga and by a ' Bogota' skin. A female from Miraflores in the Cen- 

 tral Andes agrees with these skins, but a male which I shot from the same 

 tree is less rufescent and more olivaceous both above and below. A male 

 from Salencio, in the western Andes west of Cartago, is, in general coloration, 

 between the male and female from Miraflores. A male from San Antonio 

 is somewhat more richly colored than the Miraflores male and has the bill 

 stouter. A male from Cocal on the whole resembles the San Antonio bird 

 but has the bill even heavier. A male from Barbacoas has the bill as heavy 

 as that of the Cocal specimen, the plumage is still deeper in tone and the 

 markings on the crown are darker and are reduced to shaft-streaks. Both 

 the characters it exhibits, and the zone it inhabits, indicate that this Barba- 

 coas specimen represents a well-marked race of pusilliis. 



The material at my command does not permit me to reach a satisfac- 

 tory conclusion concerning the status of this west Colombian form. The 

 case is further complicated by the interesting fact that the Salencio speci- 

 men above mentioned, is essentially a duplicate in color and size of the type 

 of Campylorhamphus chapmani Ridgw. (Proc. Biol. Soc. Wash., XXII, 



1 See also Hartert, Nov. Zool., IX, 1902, p. 616. 



