MILVULUS. 327 
middle toe, with claw (or else a conspicuous white cottony patch on 
each side of rump’). 
a’. Tail-feathers partly rufous; lower parts uniform ashy for ante- 
rior half (approximately), pale yellowish for posterior portion. 
(Wing about 3.25-4.50.).........cccceees Myiarchus. (Page 332.) 
@. Tail-feathers without any rufous; lower parts not colored as in d. 
é. Wing at least six times as long as tarsus. (Wing about 3.00- 
A 2D .) sssinonoancenwaenredoatdsedssceseaeos Contopus. (Page 336.) 
e*. Wing not more than five times as long as tarsus. 
f*. Sexes alike in color, the plumage without any red, and 
destitute of streaks on lower parts. 
g'. Wing more than 3.25......... Sayornis. (Page 335.) 
g’. Wing less than 3.25....... Empidonax. (Page 339.) 
J’. Sexes very different in color, the adult male with whole 
top of head and lower parts scarlet, the female and 
young distinctly streaked beneath. (Wing about 
SiZD:) assnsaseseaidelsdnieisedies Pyrocephalus. (Page 345.) 
b. Bill from nostril less than half as long as tarsus, the culmen much curved. 
c’. Wing more than 3.00; lower parts, except throat, pure lemon-yellow ; 
a broad white superciliary stripe; middle of crown, in adult, with a 
concealed orange patch.......scccsecsseeees Myiozetetes. (Page 331.) 
ce, Wing less than 2.50; lower parts dull whitish or yellowish white; no 
superciliary stripe, and top of head without concealed colored 
PSLCh a 2.00. sevcwvscerssscusneseevedssenareceeweeunays Ornithion. (Page 345.) 
Genus MILVULUS Swainson. (Page 326, pl. XCL., fig. 8.) 
Species. 
a, Tail-feathers black, the outer one edged with white; top of head deep black; 
axillars pure white. Adult male: Back light bluish gray ; entire lower parts 
pure white; middle of crown with a concealed patch of bright lemon-yellow ; 
length about 12.00-14.50, wing 4.10-4.75, tail 9.00-10.00. Adult female: 
Similar, but rather smaller, with tail shorter, and yellow crown-spot shorter. 
Young: Similar to adult, but tail much shorter (sometimes scarcely forked), 
colors duller, the wing-coverts bordered with pale rusty, and no yellow on 
crown. Had. Tropical America in general, including Lesser Antilles; north, 
normally, to southern Mexico, accidentally to Mississippi, Kentucky, and 
New Jersey......scssecseee 442. M. tyrannus (Linn.). Fork-tailed Flycatcher. 
a’, Tail-feathers chiefly white; top of head ash-gray; axillars red or orange. Adult 
male: Above light bluish gray, the back tinged with red; lower parts white, 
faintly tinged with bluish gray anteriorly, the sides, flanks, and under tail- 
coverts strongly washed with salmon-pink; axillars and concealed spot in 
middle of crown scarlet; length about 12.00-15.00, wing 4.40-5.15, tail 
1In “ Contopua”’ (i.¢., Nuttallornis) borealis. 
