BIRDS OF NORTH AND MIDDLE AMERICA. 555 
Adult male—Wing, 214.5-215 (214.7); tail, 112.5-113 (112.7); 
exposed culmen (one specimen only), 41; tarsus, 20-20.5 (20.2) ; middle 
toe, 26-28 (27).¢ ' 
Adult female.—Wing, 222; tail, 116; exposed culmen, 42.5; tarsus, 
20; middle toe, 27.5.° 
Islands of Caribbean Sea and middle Atlantic Ocean, from coast 
of British Honduras (Southwest-of-all Cay; Glovers Reef) to St. 
Paul Rocks and Fernando Noronha, off Brazil, and Ascension 
Island and Tristan da Cunha, off southern Africa. 
A[nous] tenuirostris (not Sterna tenutrostris Temminck, 1823) Savin, Ibis, 1864, 
383 (Southwest-of-all Cay, Brit. Honduras). 
Anous tenuirostris Cours, Ibis, 1864, 393 (Glovers Reef, Brit. Honduras; crit.); 
Birds Northwest, 1874, 710, footnote, part (synonymy).—Satvin, Ibis, 
1866, 200 (Glovers Reef).—Sctater and Satvin, Proc. Zool. Soc. Lond., 
1871, 566, part (coast of Honduras; Trinidad; monogr.). 
[Anous] tenuirostris ScLateR and Satvin, Nom. Av. Neotr., 1873, 147. 
Anous melanogenys (not of Gray, 1846) SaunpERs, Proc. Zool. Soc. Lond., 1876, 
670, part, pl. 61, fig. 2 (coast of Central America; monogr.); 1877, 798, part 
(St. Paul Rocks, Atlantic Ocean; Tristan da Cunha Island); Voy. ‘Chal- 
lenger,’ ii, pt. viii, 1881, 137, part (St. Paul Rocks; Tristan da Cunha).— 
Penrose, Ibis, 1879, 280 (Ascension Island; habits; descr. eggs).—Batrp, 
Brewer, and Rripaway, Water Birds N. Am., ii, 1884, 324, part (coast 
Honduras). 
A[nous] melanogenys Ripgway, Man. N. Am. Birds, 1887, 48, part (‘‘Gulf coast 
of Mexico’’). 
Anous leucocapillus (not of Gould, 1845) Saunpgrs, Proc. Zool. Soc. Lond., 1876, 
670, part, pl. 61, fig. 3 (monogr.).—Stoneg, Proc. Ac. Nat. Sci. Phila., 1894, 
117, part (Brit. Honduras; crit.). 
«Two specimens, from Glovers Reef, British Honduras, 
b One specimen, from Glovers Reef. 
Ex- 
Locality. Wing. | Tail. posed Tarsus. le 
men. 
MALES. 
Two adult males from British Honduras.............-..--.---- 214.7} 112.7 41 20.2 27 
Twenty-six males from Clipperton and Cocos Islands (.M. m. 
CiGMESUS )weaesceeracmangadewiace stemasiaeiamemeraigesisentcee camper 232 124 44.7 20. 2 27.8 
Seven adult males from Hawaiian Islands ( M. m. melanogenys).| 218.1 | 124 42.1 19.8 26.4 
One adult male from Philippine Islands (M. m. worcesteri)....| 218 120.5 44 20. 5 30 
FEMALES, 
One adult female from British Honduras................-.---- 222 116 42.5 20 27. 
Thirty adult females from Clipperton and Cocos Islands (M.m. 
GUC IME BIUS) acs ce rascscn ens dusvey crate apeis'ose/oereee edsiajaig sion ctciotaictoteraiesajneeiaie ae 229 121 42,2 19.7 27.5 
Four adult females from Hawaiian Islands (_M.m. melanogenys).; 211.4} 115.4 39.7 187} 25.2 
Two adult females from Philippine Islands (M. m. worcesteri)..| 213 115 39.2 20. 2 28.5 
Two adult females from Kermadec Island (M. m. aexss| 217.7 } 119 41.5 19.7 28,2 
(Measurements of M. m. diamesus are from Gifford, Proc. Calif. Acad. Sci., 4th ser., 
ii, 1913, 32, 113.) 
