ItieT] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 113 



{€) Xo. 8009, 0. B. C, adult male. Similar to type, but forehead more 

 thickly streaked with blackish, the latter formiug almost a patch cover- 

 iug median portiou of forehead; sides of crown aud occiput SDeckled or 

 touched with dusky brownish ; thighs paler cinnamon, and cinnamon 

 on edge of wing also paler. 



(/) No. 8012, C. B. C, adult male. Head and under surface of body 

 as in type ; thighs much paler cinnamon, almost cinnamon-buff on inner 

 side. 



{g) Specimen belonging to E. C. Stuart, Tampa, Fla. In coloration 

 similar to specimen a, but neck paler, with color grading more gradually 

 into white anteriorly, the black streaks down fore-neck rather larger; 

 thighs colored as in specimen b. The two longer under tail-co\ erts with 

 an oblong blotch or spot of black near tip ; the lower parts are almost 

 entirely white, there being a few very faint narrow streaks of grayish 

 on belly and broader streaks or stripes of brownish gray (not black) on 

 breast. There is a slight tinge of light rusty on neck, but much less 

 distinct than in si)ecimen b. » 



{h) No. 110G67, Nat. Mus., adult male. This is clearly intermediate 

 between A. wuerdemanni and A. wardi and may possibly be a hybrid 

 between the two. The forehead and middle of crown, also long occip- 

 ital feathers, are immaculate white ; the longest occipital plume, how- 

 ever, is black, except for about 2 inches of its terminal portion ; the 

 sides of the crown aud occiput are black, forming a nearly uniform 

 space about 2^ inches long by half an inch wide at widest part; the 

 epaulets are black, many of the feathers, however, streaked medialy 

 with white or with much of the basal portion white. The lower parts 

 are chiefly immaculate white, as in specimen c, but the sides are chiefly 

 black. 



It would thus appear that leaving out the specimen last described, 

 which may be a hybrid, the characters of A. wuerdemanni are not only 

 very pronounced but also fairly constant. They may be briefly stated 

 as follows : 



(1) Head entirely white, excepting (usually) dusky or blackish streaks 

 on forehead or median jjortion of the crown, but even these sometimes 

 absent. 



(2) Shoulder-tufts or epaulets broadly striped with white, aud with 

 black portions of the feathers sometimes partially replaced by rusty. 



(3) Lower parts chiefly white, sometimes only the breast being 

 streaked with dusky. 



(4) Lowermost middle (and sometimes greater) wing coverts marked 

 with a median streak of white (this sometimes occupying a consider- 

 able portion of the outer web). 



(5) Outer pair of tail-feathers with a well-defined wedge-shaped mark 

 occupying basal half (approximately) of outer web. 



Placing a large series of A. herodias, A. icardi, and A. louerdemanni 

 in a row, in the order named, it is seen at a glance that the first two 

 Proe. N. M. 87 8 



