142 BROOKLYN INSTITUTE MUSEUM. SCIENCE BULEETIN 2. 6. 
the head and mottled with a wash of wood brown. The wings and 
tail are black, tips and outer edges of primaries and alula white. Ter- 
tials, secondaries and coverts are tipped and edged with pale buffy 
wood brown. Outer edges of outer pair and tips of five outer rec- 
trices white. Below dull white washed with buff and spotted with 
dusky brown except on crissum and belly. Postocular and malar 
Streaks and auriculars grayish white. Lores and subocular streak 
blackish. A faintly indicated dusky sub-malar streak. 
DoNACOBius ATRicAPiLLus ATRiCAPiLi.us (Liunaeus). 
Turdus atricapUliis Linn., Syst. Nat: ed. 12. I. 1766. p. 205. ("Cap 
Bon Spei" — Berlepsch & Hartert substitute E. Brazil.) 
Donacobius atricapillus Berlepsch & Hartert. p. 4. 
Klages sent a specimen that he collected on the Mate River, one 
of the small tributaries of the Caura River, to the Tring Museum ; and 
Mr. Beebe collected and noted this species as abundant in the delta 
at Guanoco. 
TROGLODYTIDAE— THE WRENS. 
Five genera are represented in the Orinoco region including six 
species and four subspecies. All are notable as songsters and char- 
acteristic birds of the regions that they frequent. 
Key to Genera, Species and Subspecies of Troglodytidae. 
a. Tail equal to or longer than wing HeUodyles. 
b. Under parts white without spots or markings. 
c. Upper parts greyish brown with scarcely a trace of umber, smaller. , . H. griscus. 
c' . Upper parts strongly raw umber brown or washed with brown (be- 
tween a raw umber and mummy), larger H. minor, 
V. Under parts white with breast, sides, flanks and under tail-coverts 
spotted with blackish H. tmchaiis. 
a'. Tail shorter than wing. 
b. Chin and throat pale and without dusky or blackish cross bars. 
c. Feathers on sides of neck mottled black and white, the centres being 
white, edges black LeucoUpis musicus. ' 
c'. Feathers on sides of neck not black and white mottled. 
d. Nostrils rounded, at forward end of the nasal fossa Thryopkilus. 
e. Throat white, remainder of under parts buff, on sides, 
flanks and under tail-coverts becoming ochraceous, (On 
the Caura River, the Cuchivero River and probably other 
tributaries of the Orinoco, entering that stream from the 
Guiana side) - T. albipectus albipecUis. 
iThis wren so far as known is found only in British Guiana, but it is not improbable that it may 
be taken in the delta region of the Orinoco. 
