1868.] ON THE AMERICAN RALLID^. 461 



parvo triquetro, crassitie minore, et corpore subtus pure albo facile 

 distingueudus ! 



Genus 7. Porphyriops. 



Porphyriops, Puch. R. Z. 1845, p. 278. 

 Hijdrocicca, Cab. Wiegm. Arch. 1847, p. 351. 



1. Porphyriops crassirostris. 



Fulica crassirostris, J. E. Gray, Griffith's A. K. iii. p. 542. 



Gallinula crassirostris, Darwin, Zool. Beagle, iii. p. 133 ; Bridges, 

 P. Z. S. 1843, p. 118; Pelzeln, Novara-Reise, Vog. p. 135; Sclil. 

 Mus. d. P.-B. Ralli, p. 49. 



Porphyriops crassirostris, Salvad. Att. Sc. It. viii. p. 285. 



Hydrocicca melanops, Sclater, P. Z. S. 1867, p. 333. 



Olivaceus, pileo medio obscuriore : alis fuscis, harum tectricibus 

 castaneo perfusis, secundariis externis albicante marginatis : subtus 

 cinereus, ventre medio et crisso albo ; hypochondriis olivaceo per- 

 fusis et albo maculatis : rostro obscure olivaceo, apice flavicante ; 

 pedibus corylinis : long, tota 9, alee a"2, caudx 2"2, rostri a rictu 

 095, tarsi 1'8, diyiti medii cum ungue 2*5. 



Hab. Chili {Bridges, Leybold). 



Mus. Brit., S. & G. 



2. Porphyriops melanops. 



El cara neyra, Azara, Apunt. iii. p. 223. no. 373. 



Rallus melanops, Vieill. N. D. xxviii. p. 553, et E. M. p. 1065. 



Hydrocicca melanops. Cab. Wiegm. Arch. 1847, p. 351. 



Ortygometra melanops, Burm, La Plata, ii. p. 505. 



Crew femor alis, Tsch. Wiegm. Arch. 1843, pt. 1. p. 388, et F. P. 

 ^res, p. 301(?). 



Amauroriiis femoralis, Bp. C. R. xliii. p. 600 (?). 



Porphyriops leucoptervs, Salvadori, Att. S. I. viii. p. 382 ; Scl. 

 & Salv. P. Z. S. 1868, p. 175. 



Sim., prcec. sed minor, pileo medio obscuriore, et remigibus secun- 

 dariis intus et extus albo magis distincte notatis : long, iota 7'-^, 

 alee 4'9, caudce 2'3, tarsi 1'4, digiti medii cum ungue 1'8, rostri 

 a rictu 0'9. 



Hab. Paraguay (Azara) ; Bogota {Mus. Derb.) ; Bolivia {D'Orb. 

 in Mus. Paris.) ; Peru {Tschudi) ; New Granada {Mus. Derb.). 



Mus. Derb. 



We have examined the type specimen of P. leucopterus of Salva- 

 dori, which has been kindly lent to us by the describer, and find 

 it distinguishable from the Chilian bird by the characters above 

 given. If the locality of " Paraguay," assigned to it by Dr. Salva- 

 dori, is correct, it seems probable that all the birds met with on the 

 eastern slope of the Andes will turn out to be of this form. But 

 we have as yet only been able to examine one Cisandean specimen, 

 from New Granada, in the Derby Museum. This certainly belongs 

 to the white-winged form. We shall not consider the specific dis- 



