692 SYSTEM A TIC SYNOPSIS. — LAMELLIBOSTBES — AN SERES. 
709. A. o. fulvi'gula. (Lat. /m?i;ws, reddish ; ^wZa, throat.) Florida Dusky Duck. Similar; 
lighter- colored ; throat plain pale brownish; bill olive, with black nail and base of commissure. 
A local race, resident in Florida. 
385. DA^FILA, (A non-sense word.) Pin-tail Ducks. Tail (in adnlt $) narrow, cuneate, 
when fully developed nearly as long as wing, the 2 central feathers loug-exserted, linear-acute : 
in 9 aiid young the tail merely 
tapering, with acute feathers; tail- 
feathers 16, including the long mid- 
dle pair. Bill shorter than head, 
longer than tarsus, nearly parallel 
sided, widening a little to the end, 
the nail small, the narrow nostrils 
high up in basal third of bill. 
Feathers of cheeks sweeping in 
strongly convex outline along side 
of upper mandible, beyond those 
on side of lower mandible. Wing 
acute, the 1st and 2d primaries 
subequal and longest, rest rapidly 
graduated. Necjk unusually long ^^^^ " ^ead of Dafila, $ , jiat. size. (Ad nat. del. E. C.) 
and slender, and form less stocky" than that of most ducks. Sexes and young very unlike 
in color, even to the wing-markings, as well as in shape of tail. Bill and feet dark. Under 
parts white or whitish. Speculum of ^ framed in buff, white, and black. 
710. D. acu'ta. (Lat. acMto, acute, as the tail is. Figs. 479, 480.) Pin-tail Duck. Sprig-tail. 
Adult $ : Bill black, 
with grayish - blue 
edge of upper man- 
dible ; feet grayish- 
blue ; claws black ; 
iris brown. Head and 
neck above rich dark 
brown, glossed with 
green and purple ; 
side of neck with a 
long white stripe run- 
ning up from the 
white under parts ; 
back of neck with a 
black stripe passing 
below into the gray 
color of the back; 
the lower fore-neck, 
breast, and under 
parts usually, white, 
the sides finely waved 
with black, the crissum black, white-bordered. Fore back finely waved with narrow bars of 
black and white or whitish ; the scapulars and long tertiaries firmly striped lengthwise with 
velvety-black and silvery-gray. Lesser wing-coverts plain gray ; greater tipped with reddish - 
buff, framing the speculum anteriorly ; this is of copi)ery- or purplish-violet iridescence, framed 
posteriorly with black sub-tips and white tips of the secondaries, internally Mdth silvery and 
Fig. 480 —Pin-tail Duck, $ J> . (From Lewis. 
