132 LARID^. 



7. NiENIA. ^ 



Type. 



Nsenia, Bote, Isis, 1844, p. 189 N. inca. 



Sternolophota, Lesson, teste Gray, Hand-l. B. iii. p. 123 



(1871) N. inca. 



Larosterna, Bhjth, Cat. B. Mus. As. Soc. p. 293 (1849) N. inca. 



Inca, Jard. Contrib. Orn. p. 33 (1850) N. inca. 



Mange. Coasts of Peru and Chile. 



1. Nsenia inca. 



Sterna stolida, Lesson, Voy. ' Coqidlle,' i. p. 244 (1826 : Concepcion 

 Bay, ChUe). 



Sterna inca, Lesson, Voy. ' Coquille,' p. 731, no. 145, Atlas, pi. 47 

 (1826: Peru); id. Man. d'Orn. ii. p. 383 (1828); id. Traite, 

 p. 622 (1831) ; id. H. N. Manmi. et Ois. ix. p. 518, pi. 47. fig. 1 

 (1837) ; TscfiudiSr Cab. Faun. Feruan., Aves, pp. 53, 305 (1846) ; 

 Reichenb. Isatat. tab. xx. tig. 811 (1848). 



Nffinia inca, Boie, Lsis, 1844, p. 189 (type of genus) ; Reichenb. Av. 

 Syst. Nat, Longijj. p. v (1852) ; Bp. C. R. xlii. p. 773 (1856) ; 

 Scl. Sj- Sail'. P. Z. S. 1871, p. 567 (revision Neotrop. Laridse) ; 

 itd. Nomencl. Av. Neotrop. p. 147 (1873) ; Saunde7-s, P. Z. S. 

 1876, p. 667 (revision) ; id. Journ. Linn. Soc. xiv. p. 404 (1878 : 

 distribution) ; Salvin, Cat. Strickl. Coll. p. 626 (1882) ; Saunders, 

 P. Z. S. 1882, p. 520 (Callao) ; Taczan. Orn. Perou, iii. p. 446 

 (1886) ; MacFarl. Ibis, 1887, p. 204 (Callao) ; Tristr. Cat. Coll. B. 

 p. 9 (1889) ; Hartert, Ratal. Voyekamml. Senckenb. p. 238 (1891); 

 Berlei)sch^ Stolzm. P. Z. S. 1892, p. 400. 



Noddi inca, Gay, Hist. Chile, Zool. i. p. 486 (1847). 



Anous inca. Gray, List B. Brit. Mus., Anseres, p. 181 (1844) ; id. 

 Gen. Birds, iii. p. 661 (1846) ; Licht. Nomencl. Av. p. 97 (1854: 

 Chile); Pelz. Reis. Novara, Vog. p. 156 (1865: Chile); Bias. 

 J. f. 0. 1866, p. 83 ; Gray, Hand-l. B. iii. p. 123, no. 11091 (1871 : 

 Cliile) ; Ciinningk. Sir. Magell. p. 404 (1871: Coquimbo) ; Pelz. 

 Verh. z.-b. Ges. Wien, 1873, p. 159 (Callao Bay). 



Larosterna inca, Blyth, Cat. B. Mus. As. Soc. p. 293 (1849 : type 

 of genus). 



Inca mystacalis, Jard. Contrib. Orn. p. 33 (1850: tvpe of genus) ; 

 Cassin, U.S. E.vpl. Exp. p. 391 (1858 : Callao). 



Adult male in hreeding-plumage. Forehead and crown dark bluish 

 slate-colour ; from the base of the maxilla, below the eye, a white 

 moustache, prolonged to the auricles and thence detached in curling 

 feathers, some of them 2 inches long; mantle a mere shade lighter 

 than the crown ; most of the secondaries broadly tipped with white ; 

 primaries brownish black, paler towards the margins of the inner 

 webs, the four upper ones greyer and edged with white ; central 

 tail-feathers like the mantle, the lateral ones brownish like the 

 primaries ; underparts like the upper, but paler on the under wing- 

 coverts and on the throat : bill strong, the maxilla deciirved, bright 

 blood-red ; tarsi, toes, and webs crimson, the latter well developed. 

 Total length 16 inches, culmen 1*9, wing 11-2, tail 5-8, depth of 

 fork 1-4, tarsus 0-9, middle toe with claw 1'2. 8o far as is known, 

 there is no difference in the plumage of the sexes. I am not aware 

 of any seasonal change. 



