113 
Paraguay , Bolivia, and Southern Brazil • 
78. LlCHENOPS PERSPIC1LLATA. 
Lichenops perspicillata Scl. Cat. B. xiv. p. 48; Arg. Orn. 
i. p. 129. 
a, b. B ? ad. Los Ynglases, Ajo. Nov. 5, 10, 1908. 
c , d. ? ad. Cape San Antonio. Dec. 16, 21, 1908. 
e,f. $ ad. Los Ynglases, Ajo. Jan. 2, 29, 1909. 
g, h, i,j , &, l, m. £ ? ad. & young. Los Ynglases, Aj6. 
Feb. 7-16, 1909. 
? ad. Monte Alto, Paraguay. Aug. 25, 1909. 
o,p. <$ ad. Bella Vista, N. Argentine. Nov. 12, 1909. 
Ad. $. Irides, bill and wattles pale Naples-yellow ; legs 
and toes black. 
Ad. ? . Irides, bill and wattles Naples-yellow, much paler 
than in the male, tip of bill horny ; legs and toes black.; 
Young Irides raw sienna, eyelid very pale Naples- 
yellow ; bill brown-horn-coloured afc tip, white-horn-coloured 
at base, gape slightly yellow; legs and toes black. 
The December and January birds are shewing signs of 
wear, and the February females are much worn, but are not 
yet moulting, though the male for the same month is in full 
moult. 
There are four young birds taken in February, three males 
and one female ; and although the female is slightly paler 
than the male, there is no real difference between them, and, 
except for the softer texture of the feathering and the 
narrower striping of the breast, they are similar to the 
adult female/* 
The “ Silver-bill ” is common and resident in the Ajb 
district, and a few were observed on the river expedition. 
It frequents the great swamps, where also it nests, placing 
the structure at the bottom of a clump of rushes or long grass, 
usually in a dry spot. 
The nest is open and cup-shaped, composed of dry grass 
and flags, and is very difficult to find, especially as the hen 
slips off it long before the searcher is anywhere near, and 
only by carefully watching her can the nest be discovered. 
The full clutch consists of three eggs, and the young are 
at first covered with black down. 
SER. ix.—VOL. v. 
i 
