116 PROCEEDINGS OP THE ACADEMY OF [1894. 



which Mr. Saunders identifies it, the figure is certainly very poor, but 

 the name will have to be considered a synonym of A. lemocapillus 

 Gould. 



The sooty brown-h\?ic\i species so well figured and described by 

 Mr. Saunders (P. Z. S, 1876, PL LXI, Fig. 3) as " ^. leucocapillus 

 Gould ' ' seems to be the most distinct of the three, but is, so far as I 

 can ascertain, unnamed. I therefore propose for it the name of A. 

 atrofuscxts. 



The following table will serve to distinguish the species : 



a. General color of plumage sooty-brownish, or blackish slate. 

 b. Size larger, wing 10 ins. or more. 



c. Plumage sooty -brown A. stolidus 



d . Plumage darker, more slaty ... .A. galapagensis 

 h' . Size smaller, wing 9 ins. or less. 



e. Plumage ^ooiy-hrown, white of head sharply defined 



posteriorly A. atrofnscus 



c' . Plumage blackish slate, white of head shading grad- 

 ually into the color of the back. 



d. Lores light slate colored A. tenuirosirxs 



d'. Lores jet black A. leucocapillus 



a'. General color of plumage very light gray. 



b. Nearly pure white beneath A. cinereus 



b'. Light gray beneath, nearly uniform with the back. 



A. caeruleus 



Anous stolidus Linn. 



Sterna doUda Linn., Syst. Nat., 1, p. 227 (1766). 



/Sterna /».9cato Linn., Syst. Nat., 1, p. 228 (1766). 



(Sterjia |)ifei^a Scop. , Del. Faun, et Flor. Insu])r. , I, p. 92, No. 73 

 (1786). 



Sterna senex Leach in Truckey's Exped. to the Congo, App. p. 

 408 (1818). 



yluoits /lir/ey Steph. , Shaw's Gen. Zool., XIII, 1, p. 140, PI. 17 

 (1825). 



Anous spadiacea Steph., Shaw's Gen. Zool., XIII, 1, p. 143 

 (1825). 



Sterna unicolor Hi ordm.,'Enn.yerz.y. Thier andPfl., p. 17(1835). 

 Anous TO KSi<eaui Hartl., Beitr. Orn. Madagasc. , p. 86 (1S60). 

 Hab. Intertropical seas north to Gulf coast of United States. 



