362 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Juvenal (?). — None seen, but one described by Ogilvie-Grant as "quite 

 young" is said to have "the upperparts very similar to those of the female 

 adult, but all the feathers of the mantle, wing-coverts, scapulars, and 

 chest have pale buff shaft-stripes ; chin and throat white, rest of the under- 

 parts white irregularly barred with black." 



Other plumages apparently unknown. 



Adult male.— Wing 96-106 (101) ; tail 54-67 (62) ; culmen from base 

 12-14 (12.9) ; tarsus 25-30 (27.5) ; middle toe without claw 21-24 (22.5 

 mm.).^* 



Adult female.— Wing 95-99 (97) ; tail 55-62 (58.5) ; culmen from 

 base 12-13 (12.7) ; tarsus 25-28.5 (26) ; middle toe without claw 24-24.5 

 (24.3 mm.)." 



Range. — Resident in open grassland savannas in French, Dutch, and 

 British Guiana, the adjacent part of northern Brazil (upper Rio Branco) 

 west through Venezuela in the Orinoco Basin and north to Caracas and 

 Carabobo in the coast region ; introduced on Mustique Island, Grenadines, 

 and in St. Thomas, Virgin Islands. 



Type locality. — French Guiana. 



Perdix sormini Temminck, Hist. Nat. Pig. et Gallin., iii, 1815, 451 (French Guiana ; 

 coll. Paris Mus.). — Vieiixot, Nouv. Diet. Hist. Nat., xxv, 1817, 246 (Guyane) ; 

 Tabl. Enclycl. Meth., i, 1820, 369. 



Perdix sonninii Temminck, Hist. Nat. Pig. et Gallin,, iii, 1815, 737 (French Guiana) ; 

 Nouv. Rec. PI. Col., v, 1823, pi. 75 and text. 



Ortyx sonninii Stephens, in Shaw, Gen. Zool., xi, pt. 2, 1819, 383. — ^Jardine and 

 Selby, Illustr. Orn., i, 1828, text to pi. 38.— Lesson, Illustr. Zool., i, 1832, text 

 to pi. 52.— Gray, List Birds Brit. Mus., pt. 3, 1844, 44 (British Guiana) ; pt. 5, 

 Gallinae, 1867, 77 (British Guiana).— Rein hardt. Ibis, 1861, 114 (St. Thomas; 

 crit.). — Pelzeln, Orn. Bras., iii, 1870, 290 (Forte do Sao Joaquim, Rio Branco, 

 n. Brazil). 



[Ortyx] sonninii Gray, Gen. Birds, iii, 1846, 514; Hand-list, ii, 1870, 273, No. 9787.— 

 Reichenbach, Synop. Av., iii, Gallinaceae, 1848, pi. 193, fig. 1674. 



Or[iyx] sonninii Stephen, in Shaw, Gen. Zool., xiv. pt. 1, 1826, 303. 



Colinus sonninii Lesson, Traite d'Orn., 1831, 508 (in list of species; distr.). 



Eupsychortyx sonninii Gould, Monogr. Odontoph., pt. 3, 1850, pi. 11 and text. — 

 Newton, Ibis, 1860, 308 (St. Thomas, Greater Antilles, introduced from Vene- 

 zuela).— Cassin, Proc. Acad. Nat. Sci. Philadelphia, 1860, 378 (St. Thomas, 

 introduced) . — Sclater and Salvin, Proc. Zool. Soc. London, 1869, 252 (Plains 

 of Valencia, Venezuela). — Cory, Auk, iv, 1887, 225 (St. Thomas; syn. ; descr. ; 

 crit.) ; Birds West Indies, 1889, 224 (St. Thomas) ; Cat. West Indian Birds, 

 1892, 96 (St. Thomas) ; Publ. Field Mus. Nat. Hist, orn. ser., i, 1909, 239, in 

 text (British Guiana; Caracas, Venezuela; crit.). — Berlepsch, Journ. ftir Orn., 

 xl, 1892, 92, in text (French Guiana; Quonga, British Guiana; crit.). — OciLVlEf- 

 Grant, Cat. Birds British Mus., xxii, 1893, 409 (Porte do Rio Branco, n. Brazil; 

 Quonga, British Guiana ; Caracas, Venezuela ; Mustique, Grenadines) ; Handb. 

 Game Birds, ii, 1897, 130; Ibis; 1902, 239 (Quonga, British Guiana; Mustique; 

 crit.).— Hartert, Ibis, 1893, 306, in text, 338, footnote (range, etc.) ; 1894, 430, 



" Twelve specimens from Venezuela. 

 "Eight specimens from Venezuela. 



