CHAEADEIUS. 173 



CHARADRIUS COLLARIS. 



AZABA'S SAND-PLOVER. 



Charadrius, subgen. JSgialophili minores, pedibus pallidis : nucha nee collari nigro, nee collari Diagnosis. 

 albo ornata : pectore fascia nigra notato. 



No local races of this species are known. Variations. 



Charadrius collaris, Vieillot, N. Diet. d'Hist. Nat. xxvii. p. 136 (1818). Synonymy. 



Charadrius azarae, Temminck, PI. Col. no. 184 (1823). 



Charadrius larvatus, Lesson, Man. d'Orn. ii. p. 318 (1828). 



Hiaticula azarae (Temm.), Gray, List Birds Brit. Mus. iii. p. 70 (1844). 



Hiaticula collaris (Vieill.), Sclater, Proc. Zool. Soc. 1860, p. 290. 



vEgialites collaris {Vieill.), Sclater §■ Salvin, Proc. Zool. Soc. 1869, p. 252. 



iEgialitis gracilis, Cabanis, Journ. Orn. 1872, p. 158. 



Plates. — Temminck, PI. Col. no. 184. Literature. 



Habits.— Bartlett, Proc. Zool. Soc. 1873, p. 309. 

 Eggs. — Harting, Proc. Zool. Soc. 1874, pi. lx. fig. 7. 



Azara's Sand-Plover is a tropical form of the Kentish Plover (C. cantianns), but the Specific 

 /Jack pectoral band is complete in adult birds, and nearly so in young in first plumage. characters - 

 Otherwise it is difficult to distinguish from some other representatives of the Kentish 

 Plover (C. marginatus, C. nivosus, and C. dealbatus), all of which, like it, have pale legs. 

 From C. peroni, which also has pale legs, it is easily distinguished by the absence of either 

 a white or black nuchal collar. 



The plumage of male and female birds, both in summer and winter, presents no 



