BIRDS OF NORTH AND MIDDLE AMERICA. 611' 



passing terminally into pale dull olive-yellow; inner webs of two outer- 

 most rectrices with a large terminal or subterminal spot of white; sides 

 of head, including- a narrow superciliary stripe (becoming indistinct or 

 obsolete beyond e3^e), a large crescentic suborbital space, greater part 

 of auricular region, whole malar region, and entire under parts clear 

 lemon yellow, the sides and flanks ver}' indistinctly streaked with olive- 

 greenish (these streaks more distinct on sides of breast); a postocular 

 and a rictal streak of olive-greenish; maxilla brownish black, with paler 

 tomia; mandible horn brownish, paler basally; legs and feet horn 

 brownish (in dried skins); length (skins), 115-119 (117); wing, 55-59 

 (56.8); tail, 51; exposed culmen, 10.5-11.5 (11); tarsus, 19-21 (19.8).^ 



Adult female. — Similar to the adult male and not alwaj^s distinguish- 

 able, but usually (^) slightl}" duller in color; length, 105-115 (110.5); 

 wing, 53-56 (54.5); tail, 47-49 (47.4); exposed culmen, 11-12 (11.2); 

 tarsus, 19-20 (19.5).^ 



Young., first 2)litiitage.—A.hoyQ plain light grayish brown, tsomewhat 

 darker on back; middle and greater wing coverts edged with lighter 

 brownish and indistincth^ tipped with dull light Inifl^'y; remiges and 

 rectrices dusky, edged with light olive, these edgings on tertials broader 

 and paler; lower parts entirely dull whitish, faintly tinged with 3 el- 

 low posteriorly, strongly tinged with grayish brown on sides of breast. 

 (Described from No. 111,258, coll. U. S. Nat. Mus., Swan Island, 

 Caribbean Sea, February 3, 1887; C. H. Townsend.) 



[Some apparently adult s])ecimens, of l)oth sexes, possibly younger 

 birds, are duller in color than those from which the above descriptions 

 of the adult male and female are taken, while several which are other- 

 wise as bright colored have the olive-green of the upper parts, espe- 

 cially on the hindneck and part of the pileum. replaced by clear ash 

 gray, and the yellow of the throat by a much paler tint, almost 3 el- 

 lowisli w^hite. 



Having only one specimen, an adult female, from the island of 

 Grand Ca3"man (the t3'pe localit3") for comparison with the Swan Island 

 series, I can not bo sure that the birds of the two islands are realh" 

 identical.] 



Islands of Grand Cayman and Swan Island, Caribbean Sea. 



Dendroica rikillna Cory, Auk, iii, Oct., 1886, 497, 501 (Grand Cayman, Caribbean 

 Sea; coll. C. B. Cory); iv, 1887, 181 (St. Andrews I., Caribbean Sea); v, 

 1888, 157 (Grand Cayman); vi, 1889, 31 (Little Cayman; Cayman Brae); 

 Birds W. I., 1889, 286; Cat. W. I. Birds, 1892, 18,' 119, 129, 155 (Grand 

 Cayman) . — RiDCiWAY, Proc. U. S. Nat. Mus., x, 1888, 57-1 (Grand Cayman) , 

 576 (Swan I., Caribbean Sea; desci*. young). 



' Five specimens, from Swan Island, Caribbean Sea. 



'■^ Four specimens, from Swan Island, Caribbean Sea. A single female from Grand 

 Cayman (the type locality) measures: Length (skin), 112; wing, 52; tail, 45; exposed 

 culmen, 12; tarsus, 20. 



