PACHYSYLVIA. 395 



HylopTiilus thoracicus griseiventris Berlepscli & Hartert, Nov. Zool. ix. 



p. 11, 1902 (Suapure, Venezuela). 

 Pacliysylvia griseiventris Brabourne & Chubb, B. S. Amer. i. p. 349, 



no. 3571, 1912 ; Beebe, Tropical Life in British Guiana, p. 130, 



1917 (Bartica). 



Adult female. General colour above yellowish o;reen, includincr 

 the back, wings^ and tail, sides of face, and a band across the 

 fore-neck and breast, the last paler than the back ; inner webs of 

 flight-quills dark brown, margined with sulphnr-j^ellow ; hinder 

 crown, nape, and hind-neck slate-grey ; fore part of head tinged 

 with yellowish green ; throat, abdomen, and sides of body ash- 

 grey, becoming white on the middle of the lower abdomen and 

 vent ; under tail-coverts, axillaries, under wing-coverts, and inner 

 margins of quills below lemon-yellow, remainder of quill-lining 

 hair-brown ; lower aspect of tail pale yellow. 



Total length 113 mm., exposed culmen 12, wing 51, tail 46, 

 tarsus 17. 



The female described was collected on the Abary River in 

 February 1907. 



Adult male. Similar to the adult female but slightly larger. 

 Wing 55 mm. 



Breeding-season. Unknown in British Guiana. 



JVesf. Uniecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Bartica, Makauria River, Abary River [McConnell collection) ; 

 Kamarang River, Kumakusa, Bartica [Whitelg). 



Kxtralimital Range. Venezuela, Colombia. 



Ilahits. Unrecorded in British Guiana. 



59G. Pachysylvia thoracicus abariensis, subsp. nov. 



Ar.AUY River Wood-Bird. 



Pacliysylvia pectoral is (nee Selater, part.) Brabourne & Chubb, B. S. 

 Aiiier. i. j). 319, no. 3573, 1912. 



Adult male. Allied to P. thoraricus thoracicus Teinm., but difiors 

 in being ])aler in general coloration and smaller in measure- 

 ments. The crown of the head and si<les of th« face pale ash- 

 grey ; throat whitish ; back, wings, and tail bright yellowish 

 green; inner webs of flight-(|uills dark brown with»pale yellow 



