182 Mr. G. N. Lawrence on new Birds from Panama. 
tail-coverts dull rufous; bill brownish horn-colour, the under 
mandible a little paler than the upper; legs and feet dark brown. 
Length 7 inches; wing 3f; tail 1-J; bill If; tarsi yf. 
Fam. FORMICARIES. 
3. Formicivora yirgata, sp. nov. 
Male. Intense black, a large concealed patch of pure white on 
the back; tail black, each feather with a white spot at the end, 
largest on the outer feathers; wings black, the bend of the wing 
white, the lesser coverts marked with small white spots, as in 
F. boucardi, and the larger coverts ending in pure white and 
forming a conspicuous mark on the wing; under wing-coverts 
and inner edges of quills white; the feathers on the sides of the 
breast marked along their shafts with a narrow stripe of 
white, which reaches nearly to their ends—these marks being 
only apparent on raising the feathers; bill and legs black. 
Length 4 inches; wing 1|; tail If; tarsi 
Female. Resembles the male in the upper plumage, but below 
is entirely of a very deep chestnut-red. 
This species belongs to the group embracing F. quixensis.F. bou¬ 
cardi , and F. consobrina , and most resembles the latter, but differs 
in having longer wings and tail, in the greater extent of white 
on the bases of the feathers of the back, and in having the pec¬ 
toral feathers marked with white stripes down their centres, in 
this last character apparently differing from all its allies. 
4. Myrmelastes corvinus, sp. nov. 
Male. The general colour is crow-black, with a large con¬ 
cealed spot of pure white between the shoulders; tail black ; 
quills blackish brown, w T ith their inner edges greyish white; 
smaller wing-coverts black, narrowly edged with white, some of 
the white tinged with rufous; larger coverts dark chocolate- 
brown, ending with dull rufous; bill black; legs dark browm. 
Length of skin 6 inches; wing 2|; tail 2J ; tarsi 1J ; bill f. 
Fam. TYRANNIDiE. 
5. Myiozetetes marginatus, sp. nov. 
Second, third, and fourth quills equal and longest, first shorter 
than sixth. 
