( 43 ) 



The adult c?cJ, as well as three others from Marabitanas, Manaos, and Salto do 

 Girao (upper Rio Madeira;, kindly lent by Dr. vou Lorenz, agree perfectly in colour 

 and dimensions with the types from the Orinoco. The females from Teffe differ from 

 those of the upper Orinoco and Rio Negro only by their paler, more lmff, less 

 ochraceons throat, ft c. cherriei is evidently the representative of the ft caerulea 

 group in the plains of the great Amazonian forest region which extends from the 

 banks of the npper Rio Orinoco to north-eastern Bolivia. In the mountains of 

 Bolivia and Peru it is replaced by ft c. microrhyncha (Berl.). I am unable to 

 separate some specimens from S. Augnstin,* Yungas of Bolivia (3500 ft.), and 

 others obtained by Mr. W. Hoffmanns near Poznzo, province Huannco, Central 

 Peru (elev. 3000 ft.), from a series of Colombian skins, though the latter have, 

 as a rule, rather longer bills. ft c. microrhyncha differs from ft c. cherriei by 

 its much longer wings and tail, its stronger and longer bill, and by having the 

 anterior portion of the crown, as well as the malar region, distinctly paler blue. 



The range of these two forms is accordingly as follows : — 



(a) ft caerulea microrhyncha (Berl.). Mountains of N.W. Venezuela (Merida), 

 Colombia, Ecuador, Pern, and North Bolivia, above about 3000 ft. 



(b) ft caerulea cherriei Berl. & Hart. Plains of the Amazonian forest regiou : 

 on the banks of the upper Orinoco (Munduapo, Nericagna), Rio Negro (Marabitanas, 

 Guia, Rio Ioanna, Manaos), Rio Solimoes (Tefte), and Rio Madeira (Salto do 

 Girao). 



9. Cyanerpes nitida (Hartl.) 

 Coereba nitida Hartlaub, Rev. Zool. 1847. p. 84 (" le P,'rou "). 



No. 906. ? ad., 25. vi. 06. " Iris dark brown, feet yellow, bill black."— Wing 

 54 ; tail 31 ; bill 13i mm. 



Agreeing with a ¥ from the I 'aura Valley, Venezuela, but lacking the pale 

 blue band across the forehead. 



The ¥ of ft nitida differs from that of ft c. cherriei by its longer tail, 

 considerably shorter and less curved bill, bright yellow (not greyish green or 

 dusky) feet, whitish (not yellowish) breast, and more bluish green stripes on 

 the chest and sides of the body. 



10. Euphonia olivacea Desni. 



Euphonia olivacea Desmarest, Hist. Nut. Tangaras, etc., pi. xxvii. (1815— Cayenne — $ ) [Cfr. Nov. 

 Zool. ix. (1902) p. 17]. 



No. 868. S ad., 20. vi. 06. No. soft. ? ad., 20. vi. 06. " Iris dark brown, feet 

 bluish black, bill black." 



I am unable to perceive any differences between typical Cayenne skins and 

 those from Upper Amazonia. 



11. Calospiza mexicaua boliviana (Bp.) 



Cfr. supra, p. 7. 



Nos. 710, 712. 6 ¥ ad., Teffo, 29. v. 00. " Iris dark brown, bill and feet black." 

 —Wing 74£, GO ; tail 52; bill 8£, 9J mm. 



In the female the shoulder patch is uniform dark azure blue, as in specimens 



* Not from the Rio Beni, as ei'roneousl.v Mated in Xov. Zonl. xiii. fl90(!) n. 9. 



