WHITE-BROWED TERN. 149 



account tells us. Its nest and eggs have not hitherto 

 been discovered in England, but, according to Tem- 

 minck, it builds in large flocks on the strands of the 

 sea, in salt marshes, or on the naked rocks ; laying 

 two or three whitish eggs, marked with black spots of 

 various sizes. It feeds on fishes. 



WHITE-BROWED TERN. 



(Sterna superciliaris.) 



St. vertice nigro alboque vario, occipite nigro, corpore supra 



ccerulescente-cinereo, subtus superciliisque albis, remigibus qua- 



tuor primariis nigris. 

 Tern with the crown varied with black and white, the occiput 



black, the body above bluish-ash, beneath and eyelids white, 



the four primary quills black. 

 L'Hirondelle de mer a sourcils blancs. — Sterna superciliaris. VieiL 



2 Edit, du Nouv. Diet d'Bist. Nat. t. 32—176. 

 White-browed Tern. Lath. Gen. Hist. x. 108. 

 Young ? — Sterna maculata. Vieil. 1. c. ? 



Length eight inches : over the eye a broad band 

 of white, and a second of black and white beneath, 

 surrounding the eye : the sides of the head, and all 

 the under parts of the plumage, white : the top of 

 the head marbled with black and white : the occiput 

 black : the body above and wings blue-grey ; the four 

 outer quills blackish. Inhabits Paraguay ; discovered 

 by d'Azara. 



