450 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



(Nicoya, Costa Rica). — Nutting and Ridgway, Proc. U. S. Nat. ]Mus., v, 1882, 

 391 (La Palma, Gulf of Nicoya). — Zeledox, Cat. Aves de Costa Rica, 1882, 9; 

 An. Mus. Nac. Costa Rica, i, 1887, 112.— Salvin and Godman, Biol, Centr.- 

 Am., Aves, i, 1886, 412, jaart (Gulf of Nicoya). — Sharpe, Cat. Birds Brit. 

 Mus., xii, 1888, 761, part (Bebedero). 

 [Embernagra~\ siiperciliosa Sclatsr and Salvix, Nom. Av. Neotr., 1873, 33. 



ARREMONOPS SUPERCILIOSUS SUMICHRASTI (Sharpej. 

 ACAPUICO SPARROW. 



Similar to A. s. suj)erciliosus, but lateral crown-stripes and postocular 

 streak lighter chestnut, sides of head and throat less buffy, and bill 

 more slender. 



Adult male.— Length (skins), 132.08-142.24 (137.16); wing, 61.21- 

 68.58 (65.79); tail, 51.31-59.69 (56.39); exposed culmen, 12.70-13.21 

 (12.95); depth of bill at base, 7.37-7.87 (7.62); tarsus, 22.61-23.11 

 (22.86); middle toe, 14.48-16.49 (14.73).^ 



Adulf female.— Length (skins), 129.54-133.35 (131.32); wing, 62.23- 

 63.50(62.71); tail, 52.07-57.15 (54.61); exposed culmen, 12.70; depth 

 of bill at base, 7.37; tarsus, 22.35-22.86 (22.61); middle toe, 13.97- 

 15.49 (14.73).*^ 



Coast district of southwestern Mexico in the States of Colima 

 (Manzanillo), Guerrero (Acapulco), and Oaxaca (Huamelula and Puerto 

 Angel). 



Ember nagra rufivirgata (not of Lawrence, 1851) Lawrexce, Bull. U. S. Nat. iNIus., 



no. 4, 1876, 22 (Huamelula, Oaxaca). 

 [Emhernagra rufivirgata] (i. eras.siro,s<Ws Ridgway, Proc. U. S. Nat. Mus., i, 1878, 



249, part (Venando I., w. Mexico). 

 Ernbernagra mperciliosa (not of Salvin, 1864) Salvix and Godmax, Biol. Centr.- 



Am., Aves, i, 1886,412, part (Huamelula, Oaxaca). — Sharpe, Cat. Birds Brit. 



Mus., xii, 1888, 761, part (Huamelula). 

 E.\_mbernagra'\ sumichrasti Sharpe, Cat. Birds Brit. Mus., xii, 1888, 762, in text 



("Huaniela," i. e., Huamelula, Oaxaca; Brit. Mus.). 

 Arremonops rufivirgatus sumlcJirasti Nelson, Auk, xv, Apr., 1898, 157 (Pacific 



coast, n. w. Chiapas to Colima). 

 Arremonops superciliosa sumichrasti Nelson, Proc. Biol. Soc. "Wash., xiii, ]May 29, 



1899, 29, in text. 



ARREMONOPS SUPERCILIOSUS SINALOjE Nelson. 

 MAZATLAN SPARROW. 



Similar to A. s. sumichrasti, but back much tinged with gray and 

 the median crown-stripe, superciliar}' stripe, aurieidar region, and sides 

 of neck decidedl}' graj^er. 



Adult male.— Length (skins), 132.08-139.70 (135.38); wing, 62.99- 

 64.01 (63.75); tail, 54.10-56.39 (55.37); exposed culmen, 12.95-13.97 

 (13.46); depth of bill at base, 8.64-9.65 (9.40); tarsus, 20.32-23.11 

 (22.10); middle toe, 14.73-14.99 (14.86).=^ 



^ Five specimens. ^ Three specimens. 



^ Two specimens. 



