NO. 1916. REVISION OF BUT0RIDE8 VIRE8CEN8—0BERH0LSER. 563 



primaries and outermost secondaries narrowly tipped with white; 

 tertials, outer webs of inner secondaries, with greater, median, and 

 lesser wing-coverts, dark, glossy bottle green; the outer scapulars on 

 exterior webs and the first rows of lesser wing-coverts margined all 

 around rather narrowly with tawny or tawny ochraceous, the other 

 rows and the median coverts with buff, tlie greater coverts and outer 

 webs of tertials and innermost secondaries with wliite; tail dull, dark, 

 grayish blue-green; chin and middle of upper throat creamy white, 

 the latter streaked medially witli dull, dark brown; jugulum light 

 purplish chestnut, medially vinaceous cinnamon, conspicuously 

 streaked with white and obscurely with dull brown; breast, axillars 

 and posterior lower parts light drab gray, somewhat darker on the 

 breast, the longest lower tail-coverts with dark gi'ay centers and 

 whitish edges; thighs dull tawny; lining of wing light gray, with 

 edgings of buff, the edge of wing broadly bufly white. 



Measurements. — Male:^ Wing, 168.5-175.5 (average, 171.3) mm.; 

 tail,-62-69 (65.7); exposed culmen, 57-58.5 (57.8); height of bill at 

 base, 11-12.5 (11.6); tarsus, 47.5-52 (49.5); middle toe, 42.5-46 (43.8). 



Female:^ Wing, 169 mm.; tail, 65; exposed culmen, 56.5; height 

 of bill at base, 12.5; tarsus, 48.5; middle toe, 43. 



Type-locality. — Roseau, Dommica Island, West Indies. 



Geographical distribution. — Island of Dominica, West Indies. 



Tliis new subspecies is very much like Butorides virescens mesatus, 

 from Nicaragua, but the wing and tail arc somewhat longer; the bill 

 shorter; the posterior lower parts average darker, less whitish; the 

 neck and sides of the head a httle darker, more purpUsh. From 

 Butorides virescens christophorensis it is separable by its much less 

 rufescent, rather darker neck and sides of head, and shorter bill ; it is 

 larger than Butorides virescens hahamensis , and has the neck and 

 sides of head less fulvescent, more inclining to purplish. The juvenal 

 plumage of Butorides virescens dominicanus averages darker, more 

 heavily streaked below than that of Butorides virescens cuhanus, at 

 least as shown by the specimens now at hand. 



The single adult female (No. 77856, U.S.N.M.) is the darkest of 

 the adults, particularly on the posterior lower parts, and probably 

 represents about the maximum of variation in this direction. It is 

 not as dark as average specimens of Butorides virescens luc'mnus, 

 from St. Lucia.' One of the adult males (No. 14621, collection of 

 J. Dwight, jr.), is very light below, almost whitish. 



This race is apparently i)eculiar to the island of Dominica, where 

 it is resident throughout the year. 



Seven specimens have been at hand, those with other indication 

 than merely "Dominica" being from the subjoineil localities: 



Dominica Island. — Roseau; Soufriere. 



> Three si)ecimens, from the island of Dominica, \Vest Indies. 



* Ono specimen, from the same island. 



• See p. 565. 



