6. STERNA. 85 



Chon-illos, near Callao, Peru Salvin-Godman Coll. 



( W. Nation). 

 Callao Bay, Sept. {Aclml A. H. II. Saunders Coll. 



Markham). 

 Iquique {Roicland). H. Saunders Coll. 



Coquimbo Bay, Chile, Nov. H. Saunders Coll. 



(Adml. Markhayn). 

 Central Chile (J. liri/dyes). Purchased. 



Central Chile (/. Cunimf/). Purchased. 



Vina del Mar, ueai' Valpa- Berkeley James Coll. 



raiso. 



Valdivia, South Chile, Jan. Hume Coll. 

 (E. C. Reed). 



15. Sterna eurygnatha. 



? Sterna cayenuensis, Leot. Ois. Trinid. p. 535 (18G6). 



Sterna cayennensis (partim), Gray, Hand-l. B. iii. p. 120, no. 11051 



(1871 : Venezuela). 

 Sterna galericulata, Peheln, Orn. Bras. pp. 324, 461 (1871) ; Bd. ^ 



Sail'. P. Z. S. 1871, pp. 568-9 (partim). 

 Sterua eurygnatha, Saunders, P. Z. S. 1876, p. 654 (Santa Catharina, 



Brazil)." 

 Phaetlmsa elegans, Heine S,- Reichenow, Noniend. Mus. Hein. p. 355 



(1890: partim, Brazil). 

 ? Phaethusa cavennensis, iid. t. c. p. 355 (Brazil). 

 ? Sterna elegans, Cory, Auk, 1893, p. 220 (Tobago). 



Adult in breeding-dress. Identical with the preceding in plu- 

 mage, but the bill is lemon-yellow and the angle of the genys 

 is immediately below or very little in front of the anterior 

 portion of the nostril ; the hind parts of the tarsi, the soles, and 

 the claws are dull yellow. Total length 17*5 inches, culmen 2-7, 

 wing 12-1, tail G'o, depth of fork 2-8, tarsus 1*1, middle toe and 

 claw 1-2. 



Adult iu winter, Immature, and Younrj. As in the preceding 

 species, except that the bases of both mandibles are decidedlj' 

 olivaceous, and in the young the toes and webs are ochre-yellow. 



Nestlinrj (Eio Janeiro, June 6, ./. Younr/). Greyish white, thinly 

 streaked with dark grey on the crown, behind the eye, and on the 

 upper parts generally ; underparts white ; bill olivaceous ; tarsi 

 and toes brown, claws lighter. 



liah. East side of America, from Venezuela along the coast of 

 Brazil (breeding) and as far as Port Desire, Patagonia, 47° 30' S. 

 lat. Southern examples show a deterioration in size. 



(t. Imm. .sk. Venezuela. Purchased. 



b, c. Inun. sk. Bahia, Brazil, March \^Dr. Salvin-Godman Coll. 



Lttschnath). 



d. lmm.sk. Bahia, Brazil (7);-. Z?/.sTA?mC,^"). H. Saunders Coll. 



f,/. cT ad. et 2 Camamii, Brazil, Sept. (/T. J/. H. Saunders Coll. 



iram. sk. Harrison, R.X.). 



ff,h. (S ad. etjuv. Rio de Janeiro, July, Aug. H. Saunders Coll. 



sk. (if. M. H). 



