152 | DENDROCOLAPTIDZ. 
northwards to the Cauca Valley in Colombia, where Salmon met with it at Frontino v, 
It has not been noticed either on the Isthmus of Darien or on the line of the Panama 
Railway, but it reappears at Chiriqui and throughout Costa Rica. Nothing has been 
recorded of its habits beyond a note of Salmon’s, to the effect that it lays white eggs, 
and that its food consists of insects. 
The only species at all nearly allied to the present bird, if indeed it be distinct, 
is the next, 8. rufigenis. None of the other members of this section of the genus 
have the rufous of the crown extending over the sides of the head, as is the case 
in S. erythrops. 
2. Siptornis rufigenis. (Synallawis rufigenis, Tab. XLV. fig. 2.) 
Synallaxis rufigenis, Lawr. Ann. Lyc. N. Y. ix. p. 1051; Franiz. J. f. Orn. 1869, p. 304°; Salv. 
P. Z. S. 1870, p. 191°; Scl. P. Z. S. 1874, p. 19%. 
Siptornis rufigenis, Scl. Cat. Birds Brit. Mus. xv. p. 60°. 
S. erythropt persimilis, corpore subtus magis rufescente et superciliis pallide rufis forsan distinguendus. (Descr. 
maris ex Costa Rica. Mus. nostr.) 
Hab. Costa Rica? (A. C. Garcia!, Carmiol®). 
This bird was described by Mr. Lawrence from a specimen sent him by Mr. A. C. 
Garcia from Costa Rica, but the precise locality where it was obtained was not 
recorded. We have a similar bird sent us by Carmiol, which, though marked as a 
male, is also without exact locality. These two specimens were compared by Mr. 
Sclater and found to agree®. The points of difference between these specimens and 
adult S. erythrops consist, as Mr. Lawrence says, in the crown being olive rather than 
dark cinnamon; the under surface pale cinnamon rather than greyish brown; the 
under wing-coverts a shade lighter, more distinct superciliaries, &c. 
Our specimen of S. rufigenis appears to be immature, and we still are doubtful 
whether the supposed distinctive characters are not those of immaturity. On the 
other hand, a young individual of S. erythrops has a greyer under surface than that of 
S. rufigenis and paler though equally well-defined superciliary stripes. 
Materials are still wanting to settle the status of S. rufigenis definitely. 
PSEUDOCOLAPTES. 
Pseudocolaptes, Reichenbach, Handb. p. 209 (1853); Scl. Cat. Birds Brit. Mus. xv. p. 77. 
Pseudocolaptes is a peculiar genus having much the general appearance of a Philydor 
or Automolus, but the shape of the nostrils shows its relationship with the Synallaxine ; 
they are long slits overhung by membrane, and placed along the lower edge of the 
nasal fossa: the bill is very straight and sharp; the toes are short and the claws strong 
but short ; the wings long, the primaries considerably exceeding the secondaries, the 
third, fourth, and fifth primaries the longest in the wing. 
