592 MESSRS. SCLATER AND SALVIN ON [May 23, 



272. Ereunetes petrificatus, 111. ; Baird, B. N. A. p. 724. 

 Mexiana. 



273. GaMBETTA FLAVIPES, Gm. 



Mexiana. 



274. Rhyacophilus solitarius (Wils.). 

 Mexiana. 



275. Tringoides macularius (Linn.). 

 Mexiana. 



Fam. Rallid^. 



276. Porzana cayennensis (Liun.). 

 Para. 



277. PoRPHYRio parvus (Bodd.). 



Amazons. 



278. PoRPHYRio MARTiNicus (Linn.). 

 Amazons. 



Fam. PsoPHiiD/E. 



279. PsoPHTA OCHROPTERA, Pelzeln. 

 Rio Negro {ff^allace in Mus. Brit.). 



Mr. Wallace has given some interesting remarks on the geogra- 

 phical distribution of the different species of Trumpeter in his 

 'Travels' (p. 473); but, from his specimens having been lost, he 

 has perhaps not quite accurately laid down the boundaries between 

 them. Von Pelzeln's paper on the birds of this group collected by 

 Natterer* gives further details upon the subject, aud enables us to 

 indicate what we believe to be the probable ranges of the known 

 species, which appear to be separated by rivers. 



a. Species dorso ci7iereo aut alho. 



(1) Vs. crepitans (Linn.). British Guiana, extending inwards as 

 fiir as the Rio Negro. 



(2) Ps. ochroptera, Pelzeln, I. c. p. 371. Upper Rio Negro, pro- 

 bably only on the right bank. Barcellos {Natt.). 



(3) Ps. Jeucoptera, Spix. South or right bank of the Amazons 

 above the Madeira. Ega, Coari, and San Paolo ( Wallace). 



b. Species dorso viridi. 



(4) Ps. viridis (Spix). South or right bank of the Amazons below 

 the Madeira, and extending up the right bank of the Madeira to the 

 Rio Mamore {Natterer). Villa Nova (Spix). 



(5) Ps. obscura, Pelzeln. Right bank of the Amazon near Para. 

 The dividing river between this and the preceding species is not 

 known ; it may be the Tocantins, the Xingu, or the Tapajos. 



* Sitz. Ak. Wien. xxiv. p. 871 ef seq. (18.57). 



