570 MESSRS. SCLATER AND SALVIN [Julie 20, 



Coues, Proc. Ac. Phil. 1862, p. 544, et Ibis, 1864, p. 390; Salvin, 

 Ibis, 1866, p. 199. 



Sterna chloripoda, Leotaud, Ois. de Trin. p. 537 ? 



Hab. Lake of Duenas, Guatemala (Salvin) ; coast of Brazil 

 (Mus. S.-G.). 



Salvin obtained one specimen of this Tern in winter plumage on 

 the Lake of Dueiias in October 1862, which has been examined by 

 Dr. Coues. But it seems to go occasionally much further south, as 

 Salvin and Godman's collection contains a skin, apparently of this 

 species, taken at sea 300 miles off Pernambuco. 



5. Sterna trtjdeauii*. 



Sterna trudeauii, Aud. Orn. Biogr. v. p. 125; Baird, B. N. A. 

 p. 861; Coues, Pr. Ac. Sc. Phil. 1862, p. 542; Schlegel, Mus. des 

 P.-B. Sterna, p. 29. 



Sterna frobeeni, Ph. et Landb. Wiegm. Arch. 1863, p. 125, et 

 Cat. Av. Chil. p. 49. 



Hab. Coast of Brazil (Rogers) ; coast of Chili (Ley bold). 



Mr. Rogers has lately sent a series of skins of a Tern from the 

 coast of Southern Brazil, which appear to answer very fairly to 5. 

 trudeauii of Audubon, as redescribed by Dr. Coues from Audubon's 

 type. Prof. Schlegel likewise recognizes the species in skins coming 

 from the same locality. Like Audubon's and Prof. Schlegel's spe- 

 cimens, Mr. Rogers's eight skins are all white-headed, with a black 

 transocular blotch. This would give one the idea of a Tern in winter 

 dress ; but we are inclined to agree with Prof. Schlegel that this 

 species never acquires a black head. 



It is very possible, we think, that there may have been some error 

 in Audubon's locality for his single specimen of this bird (coast of 

 New Jersey), as we know that a similar mistake has been made by 

 him in other cases. 



6. Sterna cassinii. 



Sterna antarctica, Peale (nee Less., nee Forst.) ; Ph. et Landb. 

 Cat. Av. Chil. p. 49. 



Stoma meridionalis, Cassiu, Zool. U. S. Expl. Exp. p. 385 (nee 

 Brehm). 



Sterna cassinii, Sclater, P. Z. S. 1860, p. 391; Pelzeln, Orn. 

 Novara-Reise, p. 153; Abbott, Ibis, 1861, p. 166. 



Sterna ivilsoni, Burm. Syst. Ueb. iii. p. 451. 



Sterna hirando, Max. Beitr. iv. p. 865. 



Hab. Falklands (Pack, Abbott) ; coast of Brazil, Sta. Catherina 

 (Rogers) ; coast of Chili, up to Yaldivia (P/i. et Landb.). 



* There is a beautiful adult specimen of this species in the Museum at Mu- 

 nich, which has recently been examined by Salvin. It was sent from Chili by 

 Herr Leybold of Valparaiso. This specimen justifies Prof. Scbiegel's surmise 

 respecting the colour of the head of the adult bird of this Tern. The whole head 

 is pure white ; a dark transocular line traversing each side of the head, the rest 

 of the body, except the rump, which is white, is light grey. The bill is black, 

 the base being yellowish and the tip yellow. Feet yellow. 



