CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. I43 
<■'. Much paler below, the brownish-olive color being confined 
almost entirely to the flanks and under tail-coverts; upper 
surface also paler with less rufous. (Middle stretches of 
the Orinoco from the delta region — Las Barrancas — up as 
far as the first Falls, .^tures) T. albipeclus hypoleucus. 
e". Entire upper parts much darker rufous brown, below, sides, 
flanks and crissum deep ochraceous. very much richer in 
color than either of the preceding forms. (The Upper 
Orinoco from above the Falls of Atures) T. albipeclus bogolensis. 
d'. Nostrils, if rounded. 7tot at forward end of nasal fossa. 
e. Nostrils linear, opening along lower edge of nasal fossa. 
/. Throat white, breast grey Pheugopedius griseipectus 
/. Throat and breast buffy : Troglodytes musculus clarus. 
e'. Nostrils rounded, near center of 'nasal fossa. 
/. Prominent white wing-bands formed by subterminal white 
tips to greater wing-coverts MUrocerculus caurensis. 
f. No wing-bands Hemcorhma leucosticta. 
HelEodytes griseus (Swainson).! 
Fitniariits griseus Swains., Anim. in Menag. 1838. p. 325. 
Campylorhynchus griseus Berlepsch & Hartert, p. 4. 
Native name Cucarachero. In life the eye is vandyke brown; bill 
black above, greyish horn color below ; feet slate color. 
Birds of this species are usually seen (and heard) in pairs, or, 
after the breeding season, from April to July, in family parties of from 
three to eight. They are rarely seen in the dense forest, keeping 
near the borders of open savannas and localities abounding with scat- 
tering scrub oaks and clumps of underbrush. 
The nesting habits of this species are quite unusual. Early in 
my acquaintance with it I had believed it constructed its own nests, 
but that the nests built one year were not employed,- — at least not for 
the rearing of a brood of young, — until the following season. Later 
observations have convinced me, however, that rarely, if ever, does 
this wren do more in the way of nest building than to refurnish the 
abandoned nest of some other bird, and that the more dilapidated the 
structure is in outward appearance, the more acceptable it is as a true 
nesting site. The old abandoned nests of Pitangus sulphuratus are 
the ones that appear to be selected most frequently. Several of these 
nests together with nests of Myiozetetes are frequently found in the 
same tree, often within three or four feet of one another, and if one of 
the Pitangus nests is the real nest of a pair of wrens the owners may 
be seen entering the other old nests quite as frequently as they do their 
'Berlepsch & Hartert, p. 4, have called attention to the error in the British Museum Catalogue 
regarding this species and bicolor. the names having been transposed. 
