CHERRIE; ORNITHOLOGY OF THE ORINOCO REGION. 225 
Serpophaga. Inccia caudata and /. subftava differ widely from the 
typical species of Serpophaga in the style of coloration, being olive green 
above and yellowish below, and in the absence of a concealed vertical 
crown spot. The character of the tarsal envelope is also quite distinct, 
being taxaspidean.i 
As I have already pointed out ( Sci. Bull. I. 1909. p. 390), in 
fresh specimens of luezia the acrotarsium is seen to cover the anterior 
half of the tarsus only, on the inner side e.xtending back a little farther 
than on the outer side. "The upper posterior third of the back 
of the tarsus seems to be entirely nonscutellate, but on the distal two- 
Ihirds is a double .series of small elongated scutella, one on each side." 
Inezia SUBFlava (Sclater & Salvin). 
Serpophaga snbflava Sclater & Salvin, Nomencl. Av. Neotr. 1873. p. 158 
(Para, Brazil) ; Sclater, Cat. Birds Brit. Mus. XIV. 1888. p. 103. 
Serpophaga subftava Berlepsch & Hartert, Novit. Zool. IX, 1902. 40-41, 
in part ("Munduapo," upper Orinoco, Venezuela). 
Berlepsch and Hartert (/. c), called attention to the differences 
between specimens from the middle Orinoco and an example from 
Munduapo on the upper Orinoco, a difference which seems to be borne out 
by the series in this museum from the middle and delta regions and a 
single example from Nericagua on the upper river. .\nd Mr. Hellmayr- 
who made a comparison between the type of subflava and a series of 
/. caitdata seemed to find exactly those differences jwinted out by Ber- 
lepsch and Hartert, and to be observed in the specimens before the 
writer, 
/. caudata is distinguished from /. subflava by slightly longer wings 
and tail, by having the lower throat and upper breast suft'used vvii:h 
fulvous, the whitish chin spot spreading on to the upper throat, and 
belly paler yellow. 
Serpophaga hypolEuca Sclater & Sahin. 
Serpophaga hypolcuca Scl. & Salv., P. Z. S. 1866. p. 188: Berlepsch & 
Hartert, p. 41. 
On the three expeditions I have made to the Orinoco region, only 
six of these rare little Flycatchers have been collected. Specimens were 
^Fresh specimens of Serpophaga hypoleuca that have been examined, have the acrotarsium extending 
across the outer side, to and. for the distal two-thirds, around on to the back; on the inside it extends about 
half way across. Tire area between the edges of the acrotarsium on the baclc and inner posterior half of 
tarsus is occupied by a series of elongated quadrate (better described as oval, perhaps) scutella. On the 
posterior outer half of the tarsus, above that portion of the acrotarsium extending on to the back, is a single 
quadrate scutellum, and above that a nonscutellate triangular area. 
^Novit. Zool. Xni. lyo6. p. 323. 
