204 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



22.4-23.6 (23.1); depth of bill at base, 13-14 (13.2); tarsus, 27.9-30.2 

 (29.5); middle toe, 22.1-23.4 (22.9).' 



Adult female. — Above dark mouse gray, the feathers with darker 

 centers, especially on back and scapulars, where slightly glossed with 

 greenish blue; wings and tail grayish dusky, faintly glossed with 

 greenish, the feathers with narrow paler grayish margins, most dis- 

 tinct on smaller wing-coverts; under parts paler mouse gray, some- 

 times indistinctly streaked with darker, the chin and throat paler; bill, 

 legs, and feet black ; length (skins), 193-210. 8 (194. 8) ; wing, 101. 3-107. 4 

 (104.6); tail, 69.1-76.2 (73.4); culmen, from base, 19.3-20.3 (19.8); 

 depth of bill at base, 11.7-12.4 (11.9); tarsus, 25.4-27.9 (27.4); middle 

 toe, 20.1-21.1(20.6):' 



Young male. — Similar to the young female of C. robustus but decid- 

 edly paler, especially below; upper parts deep sooty grayish (similar 

 to under parts of young female of C. robustus), the wing-coverts with 

 terminal margins of paler gray; under parts similar but rather paler, 

 indistinctly streaked with dull olive-yellowish, the abdomen inclining 

 to the latter color. (Young female not seen.) 



Northwestern Mexico, in States of Sonora (Hermosilla) and Sinaloa 

 (Culiacan, Mazatlan, etc.) and Territory of Tepic (San Bias, Acapo- 

 neta, etc.). 



Faarocolius aeneus Wacjlek, Isis, 1829, 758 ( "Mexico" ; ex Icterus aeneus Lichten- 



stein, manuscript; coll. Berlin Mus.). — Bonaparte, Consp. Av., i, 1850, 426. 

 Algelaiiis] seneiM Gray, Gen. Birds, ii, 1849, 346. 

 M[plothrus\ leneus Caeanis, Mus. Hein., i, Sept., 1851, 192, footnote (Mexico).— 



RiDGWAY, Man. N. Am. Birds, 1887, 367, part. 

 Mololhrus snms Oassin, Proc. Ac. Nat. Sci. Phila., 1866, 18, part (Mazatlan).— 



Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 281, part (Mazatlan; habits).— 



ScLATER, Oat. Birds Brit. Mus., xi, 1886, 334, part (Presidio, near Mazatlan; 



Mazatlan). — Salvin and Godman, Biol. Centr.-Am., Aves, i, 1886, 451, part 



(Mazatlan; Presidio) . 

 \_Molothraa\ seneus Sclater and Salvin, Nom. Av. Neotr., 1873, 37, part. 

 C[cdlothrus'] ameus Ridgway, Man. N. Am. Birds, 1887, 589, part; 2d ed., 1896, 



600, part. 



CALLOTHRUS ^NEUS ASSIMILIS Nelson. 

 LESSER BRONZES COWBIRD. 



Similar to C. m. cm,eus, but smaller. 



Adult male.— Length (skins), 190.5-200.7 (196.1); wing, 105.2-111.8 

 (108.7); tail, 74.4-81.5 (77.5); culmen, from base, 20.8-22.6 (21.3); 

 depth of bill at base, 12.4^13 (12.7); tarsus, 27.9-29.5 (28.5); middle 

 toe, 20.8-22.1 (21.3).'' 



(Adult female and young not seen.) 



Southwestern Mexico, in States of Jalisco (Barranca Ibarra), Colima 



' Six specimens. ' Four specimens. 



