( 308 ) 



Nos. 753, 788. ? ? iul., AUianca, C, 15. xi. 10U7.— Wing 52, 5:!; tail •^G, 20; 

 liill mm. 



" Iris white or ycllowisli wliih-, feet grej-isii yellow or pale yellow, bill hlackisli 

 or grey, tip ami lower inaiiclilile paler." 



The majority of the adult males have the milky white cap laterally ami 

 posteriorly bordered by a narrow, pale bluish line ; in these specimens the back is 

 of a darker green, and the anterior portion of the white rump is faintly shaded with 

 delicate bluish. In Nos. 554, 580, 581, 1:59, and in tiifi Ailianoa example tlie pale 

 bluish edge of the cap is replaced by an indistinct yellowish green line, the back is 

 of a clearer, less intense green, and the white rump lacks the bluish tinge. 



The. series of females proves beyond doubt that my /'. </rac/l/.s was based 

 on an individual variety of /'. naUcrevi. The two from Calaraa are (|uite tyiiical, 

 having the crown washed with dull bluish, and the throat as well as the foreueck 

 strongly sulfused with green; while those from AUianca have no bluish tinge on 

 the crown, like the type of P. gracilis, with which one of them also agrees iu the 

 light, yellowish green colour of the throat. 



Until recently P. nattcrcri was only known from the Uio Madeira, where it is 

 confined to the right bank (from Borba to AUianca, and probably farther up the 

 river, for the type of P. gracilis was obtained on the l{io Guapore). Miss 

 Snethlage, however, has lately found it at Villa Braga, on the left bank of the 

 neighbouring Rio Tapajoz.* 



130. Pipra stolzmanni Hellm. 



Plpra stohiivtnni Hellmiyr, Ibh (>l) vi. p. 44 (lOOlJ. — Marabitanas, Rio Negro) ; idem, Now Zuul. 



xiv. 191)7. p. 360 (Paraizo, Borba). 

 P. vlrescens (nee Pelzeln) Pelzeln, Zai- Orn. Ih-as. ii. pp. 128, 187 (part. : Borba). 



No. 981. c? ad., Marnius, Rio Macliados, 8. vii. 1908. " Iris dingy white, feet 

 and bill black."— Wing 51 ; tail 23 ; bill 10 mm. 



Structure of the tail and coloration exactly as in the type and other specimens 

 (from Bogota, Borba, etc.). In the middle of the anterior crown there arc a few 

 minute, yellowish dots to be seen. 



P. stolzmnnni has, as yet, only been found on the right bank of the Rio Madeira, 

 but as it is also met with in Eastern Peru and Ecuador, it is very likely to occur on 

 the left bank as well. 



[l:!T. Neopipo cinnamomea (Lawr.). 



Cf. Ilellmayr, Nnr. Zool. xiv. 1907. p. 3(U (Humaytha). 



Left liank : llumaytha (Hoffmanns). Not obtained on the present occasion.] 



[13S. Xenopipo atronitens Cab. 



Xeimpipo atmiiteiii Cabani^, .tn-h.f. Xaliinj. Hi. i. p. L'14.5 (1817.- British Guiana) ; Pelzeln, Ziir 

 Orn. lirasll. ii. p. 129 (Borba). 



Right bank : Borba, in (lie forest of the ('ani[iiiui (Natterer). Nol (ibtaiued by 

 Mr. Hoffmanns. 



N.B. — I am unable to detect any differences between tyjiieal Guianan skins 

 (R. Rupununi, 11. AVhitely coll.) and those secnred by Natterer on the Madeira and 

 Rio Negro.] 



• Journ.f. Orn. 190s. p. 504. 



