Voz. II, Pr. 11] LOOMIS—A REVIEW OF THE TUBINARES 79 
a dark phase, typically manifested in No. 1185, male, June 30. 
The general aspect of the former is light drab-gray; that of 
the latter dark drab, medially lighter below and varied with 
dull cream color above, especially anteriorly (plates 9, 10). 
Both specimens are densely clothed in primary natal down. 
The secondary natal down is beginning to appear on the lower 
parts. Obviously, the dual coloration is not caused by the 
wearing off of a terminal segment of down. The specimens 
are also in the egg tooth stage. Their dimensions are: light 
phase, culmen 34.7 mm., tarsus 20, middle toe and claw 27.5; 
dark phase, culmen 39.3 mm., tarsus 22, middle toe and claw 
30.5. No: 1183, June 25, is similar to No. 1180. 
No. 1181, extreme light phase, male, June 30, is consider- 
ably larger than the specimens described, the culmen measur- 
ing 55 mm., tarsus 35.6, middle toe and claw 45. The sec- 
ondary natal down is well advanced, and the primary natal 
down is much worn on the lower parts, particularly on the 
abdomen, which is nearly bare. This specimen was prepared 
by Mr. Beck especially to show the natal down of the upper 
parts as it appears in life (plate 11). On these parts and on 
the jugulum and sides of neck the primary natal down is united 
apically into tufts, the apex of each tuft appearing as if it had 
been twirled between the fingers. In color the tufts are light 
drab-gray, subterminally creamy white, and often apically dark 
brown. The creamy white predominates on the jugulum, sides 
of neck, and anterior upper parts, and the dark brown is most 
conspicuous on the top of the head, cervix, and sides of the 
neck. The chin, throat, lores, and circumocular region are 
nearly naked. Posterior to the jugulum, the worn primary 
natal down of the lower parts is light drab-gray. On most of 
the areas the secondary natal down is lighter than the basal 
part of the primary natal down. 
Of the other June and July nestlings, No. 1182 is in the light 
phase, and Nos. 1184 and 1205 are intermediate, the former 
inclining to the dark and the latter to the light phase. All 
have entered the double-down state. 
No. 1204 (dark phase, male, September 25, culmen 98 mm., 
tarsus 73, middle toe and claw 90.3) is passing from the natal 
