534 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult y/;(//d.— Leno-th (skins), 94.49-118.03 (104.89); wing, 50.S(»- 

 54.86 (52,88); tail, 40.89-42.67 (41.15); exposed culmeu, 8.64-9.14 

 (8.89); tarsus, 17.27-18.08 (17.78); middle toe, 11.68-12.70 (12.19).' 



Adult femalt'.—l^Qngih. (skin), 106.68; wing-, 51.05; tail, 48.69; 

 exposed culmen, 8.64; tarsus, 17.78; middle toe, 11.68.' 



Island of Cozumel and Hol])ox Island. Yucatan.^ 



Fhonipara pusilla (not Tiarix jiiif<i/la Swainson) Salvix, Ibis, 1885, 190 (Cozumel). 

 [Phonipara lepida.] Snbi^p. a. Phonipara pusilla Sharpe, Cat. Birds Brit. Mas., 



xii, 1888, 147, part. 

 Euetheia oUvacea iideDitcdia Ridgway, Descr. New Sp. Birds from Cozumel, Feb. 



26, 1885, 2 (Cozumel I., Yucatan; U. S. Nat. Mus.); Proc. U.S. Nat. Mus., 



viii, 1885, 568. 

 E. [luiheia] oUvacea iuicrincdht Ridgway, INIan. N. Am. Birds, 1887, 451, footnote. 

 Phonipara intermedia Salvin and Godman, Biol. Centr.-Am. Aves, i, 1885, 360. 

 P.[liompara^ infermedia Suarpe, Cat. Birds Brit. Mus., xii, 1888, 148, in list of 



specimens (Cozumel and Holbox islands, Yucatan). 

 Phonipara lepida (not Fringilla h'pida Linnteus) Sharpe, Cat. Birds Brit. 31 us., 



xii, 1888, 145, part (in synonymy). 



EUETHEIA OLIVACEA PUSILLA (Swainson). 

 MEXICAN GRASSQUIT. 



Similar to E. o. hiteriiiediit but with the black markings in adult 

 males still more extended, that beneath extending over breast, and in 

 fully adult males the auricular region and crown black or mostly black.* 



Young male. — Similar in coloration to adult female, but duller and 

 without trace of yellow on head, the chin dull grayish white, and the 

 loral or supraloral region dusky. 



Young female. — Similar to young male, but without dull whitish on 

 chin or dusk}^ on lores. 



Adult maZe.— Length (skins), 93.98-108.97 (97.79); wing, 48.26- 

 54.36 (51.82); tail, 35.81-43.43 (39.62); exposed culmen, 8.89-10.16 

 (9.40); depth of bill at base, 6.35-7.37 {^.^^)\ tarsus, 16.26-18.03 

 (17.27); middle toe, 11.18-12.95 (12.19).'^' 



Adult female.—\j^\\gi\^ (skins), 92.46-100.84 (96.27); wing, 48.26- 

 51.56 (50.04); tail, 35.56-40.18 (37.59); exposed culmen, 8.38-9.40 



1 Six specimens. 



■■* One specimen. 



^ I have not seen specimens from Holbox Island. 



*Some specimens have the crown and auricular region olive-green, as in E. o. inter- 

 media and the Antillean forms, and are scarcely to he distinguished from the former. 

 Since, however, specimens with black crowns and aurit-ulars occur, usually pre- 

 dominantly, in the same localities, it is reasonable to suppose that these specimens 

 with olive-green crown, etc., are younger individuals. 



^Thirty-one specimens. 



