72 REVIEW OF AMERICAN BIRDS. [PART I. 
The female resembles the male, except in having the black of head replaced 
by ash, like the remaining upper parts. The white on the side of the head 
is not so distinctly defined as in the male, but the short superciliary stripe is 
distinctly appreciable. 
Total length, 3.80; wing, 1.76; tail, 1.75; exposed portion of 1st primary, 
.63; of 2d, 1.15; of longest (measured from exposed base of Ist primary), 
1.40; length of bill from forehead, .50, from nostril, .53; along gape, .55; 
tarsus, .57. 
Hab. Isthmus of Panama. 
This beautiful species, perhaps the least of the genus, is closely 
related to P. bilineata, from Carthagena. Sclater, however, describes 
this as having the tips of the outer lateral tail feather white, on 
which account Mr. Lawrence makes it distinct. As, however, Bona- 
parte, in his diagnosis of P. bilineata (Conspectus Avium, I, 1850, 
316), gives the outer tail feathers as white, the question remains to 
be decided by reference to the type in the Berlin Museum. 
Smith- Collee- Sex 
sonian| tor’s | and Locality. Ree Received from Collected by 
No. No. | Age. P 
51 fol Isthmus Panama, Bele Cab. Lawrente. ||" “ aes 
an 51 S stil wi) peeebrsell BATA) chcweeeee 
34,097 oe rofl bs snk Geo. N. Lawrence.| J. M’Leannan. 
651. Type. 
Polioptila bilineata ?? 
Culicivora bilineata, Br. Consp. 1850, 316 (type from Carthagena, in 
Berlin Museum).—Polioptila bilineata, Scuater, P. Z. S. 1855, 12; 
1860, 273.—Is. Catal. 1861, 13, no. 75. 
Hab. S. America: Carthagena; Ecuador (Esmeraldas, Babahoyo, Sclater). 
A female specimen (No. 9,110) received from Mr. Verreaux, and 
referred to in the “ Birds of North America,” 381, as possibly the 
bilineata, has the characters of the species in the white lores and 
1 Since writing the preceding I have been favored by Dr. W. Peters, Direc- 
tor of the Berlin Museum, with a diagram of the outer two tail feathers of 
the type specimen of P. bilineata, and of their markings. He states that 
“the two outer tait feathers are white except at the base, which is black, in 
such a manner that the black extends much more on the inner part at the 
vexillum than on the outer part.” The diagram represents much broader 
tail feathers than those of superciliaris, with considerably more black at the 
base; this color on the inner web extending a quarter of an inch further than 
on the outer, in the first feather covering more than one-third, in the second 
about one half of the web. In superciliaris the amount of black is consider- 
ably less, and extends little more on the inner than on the outer web. 
