154 BROOKLYN INSTITUTE MUSEUM. SCIENCE BULLETIN 2. 6. 
Only four species of North American warblers are found in the 
valley of the Orinoco, the Black-poll, Yellow Warbler, Redstart, and 
the "Water-Thrush." The Yellow Warbler and Black-poll are not 
uncommon from October to early May. The "Water-Thrush" is found 
during the same months but is much less common. Redstarts I only 
observed during April and the first week in May. 
Seiurus noveboracensis noveboracensis (Gmelin). 
Motacilla noveboracensis Gm. Syst. Nat. 1788. p. 958. 
Seiurus noveboracensis Berlepsch & Hartert, p. 10. 
Not uncommon, The sight of a "Water-Thrush" daintily bowing 
from left to right as he wandered along the shore of some stream or 
pond was as cheering as seeing the face of an old friend from home. 
VIREONIDAE— THE VIREOS, PACHYSYLVIAS AND PEPPER- 
SHRIKES. 
Some eight or nine members of this family are to be found in the 
Orinoco Region, but of this number the writer has collected only four. 
Berlepsch and Hartert in their paper include seven species of which 
they had specimens. I am now able to add Pachysyh'ia aurantiifrons 
saturata of the northern coast of Venezuela and Trinidad, based on 
specimens from the delta while P. brnnneiceps. P. hypoxantha, P. 
semicincrea Vireosyh'a calidris calidris and ]~ircosyk'a olivacca enter 
the region from the upper Orinoco. 
Key to the Species and Suisspecies of Vireonidae. 
a. Outermost primar>' (tenth) obsolete, and wing rather long and pointed. 
i>. With a dusky or blackish submalar streak 1 'ireosylva calidris calidris. 
b'. without dusky or blackish submalar streak. 
c. Sides and flanks strongly washed with olive yellow, under tail-coverts 
sulphur yellow, wing less than 75 Vireosyha chivi agilis. 
c'. Sides and flanks only faintly washed with olive yellow, under tail- 
coveits pale yellowish or white, wing more than 75 Vireosyha olivacKi. 
a'. Outermost primary (tenth) about half as long as the ninth, and wing short 
and rounded. 
b. Bill slender and but slightly decurved terminally; wing less than 65 
mm. long. 
c. A distinct olive yellow jugular band Pachysylvw thoracicus grise- 
c'. Without olive yellow jugular band. 
d. General color of under parts yellow Pachysylvia auraiilii/roiis 
saturata. 
d'. General color below not yellow. 
€. Forehead, crown and tail strongly rufous Pachysyhia ferrugineifrons. 
e'. No rufous on tail. 
/. General color of under parts huffy brow nish Pachysylvia flavipts ocuti- 
