CAI.IDias. — HETEKOrYGIA. 129 



Tin's species, like the Turnstone, is remarkaljle for its great ranoe. 

 It is known to breed throughout ahnost the whole Arctic district, 

 migrating to S. Africa, Asia, and some of the Pacific Islands in 

 the Old World, and to Chili and Buenos Ayres in the New. The 

 Sanderling does not appear to be a common bird here, as it is but 

 rarely met with.'^ 



Genus HETEROPYGIA C 



ones. 



Hcteropiif/ia Cones, Proe. Acad. Xat. Sci. Philad. ISGl, p. 19U. Type 

 H.fuscicoUis (Vieill.). 



In this genus a hind-toe is present and the tarsus is longer 

 than the middle toe and claw. 



I\e;i to the Species. 



A. Larger, wing more than 130 mm. ; central 



up]ier tail-coverts black II. pectoral is, p. 120. 



B. Smaller, wing less than 130 mm. ; central 



upjier tail-coA'erts white //. fiisc/'collis, p. 130. 



81. Heteropyg'ia pectoralis. 

 Pectoral Sandpiper. 



IIrferopi/r/if( pectoralis Say in James's Ace. Long's Exped. Rocky Mts. 



vol. i. p. 171, footnote, 1823 (Engineer Cantonment, U.S.A.) ; 



Yieill. X. Diet. d'Hist. Nat. xxxiv. p. 4-65, 1819 (" lies Antilles et 



dans les parties meridionales des Etats-Unis "). 

 lleteropipjia mocuJata Sharpe, Cat. B. Brit. Mus. xxiv. ]i. oG2, 189(5; 



Bra'bom-ne & Chubb, B. S. Amer. i. p. 42. no. 408, 1912. 



Adult male. General colour above black, with rufescent or 

 white edges to the feathers ; lower back, rump, and central u})per 

 tail-coverts uniform black ; outer tail-feathers })ale brown wifb 

 a subapical black bar and white tip ; sides of forehead, ihroat, 

 al)domen, axillarics, and under tail-coverts white ; under wing- 

 coverts brown at base and ti})ped with white ; fore-neck, sides of 

 neck, and breast isabelline grey with dark brown shaft-lines 

 becoming darker and almost uniform dark brown on the sides of 

 the breast. 



Total Jengtli 200 mm., cnlmen 29, wings 141, tail 57, tarsus 27. 



The bird descril)ed was collected on the Ituribisi Rivoi-. 



Adult female. h5iinilar to the adult nuile, ))iit smalle AVing 

 VM) mm. 



Wf have measured foui' male.'- and (iml {\\^' wings (o varv from 



K 



