17 [Vol. xxi. 



down the middle ; chest grey with a slight pinkish tinge, a 

 few of the feathers having a white dot near the extremity ; 

 breast, belly, and under tail-coverts rather pale pinkish- 

 brown, of a lighter tint than the back. Bill and feet bluish- 

 black in the dry skin. Total length 4'4 inches ; culmcu 

 A^'+0-4l ; wing J:^ J;ail V? ■ tarsus 0-64. / ^ ' ^ . 

 Hab. Chak Chak, :8a^i*r:el-Gazal. 



CiSTICOLA BUTLERI, Sp. U. 



Adult male ? Most nearly allied to C. sylvia, Reichenow, 

 but the upperpartSj including the lower back and rump, 

 are uniform reddish-brown, rather brighter on the crown 

 and on the outer webs of the secondary quills ; a rather 

 distinct pale buff eyebrow-stripe; the pale brownish-white 

 tips to the outer tail-feathers do not measure more than 

 5 mm. in width, while the blackish subterminal bands are 

 strongly defined and about 9 mm. wide. Bill blackish, 

 except the basal portion of the lower mandible which is pale 

 horn; legs pale horn-colour (in t^e dry skin)-* Total length 

 5'3 inches ; culmen. 0*5 ; wing 2"i5 ; t^ g'lS ; tarsus 0*85. 



Hab. Chak Chak, Bahr-el-Gazal. 



CiSTICOLA WELLSI, Sp. n. 



Adult female. Entire upperparts, including the crown and 

 tail, rather bright rufous-brown ; lores, short superciliary 

 stripes, chin, and throat white ; rest of the underparts rufous- 

 buff, paler on the middle of the breast and belly ; outer tail- 

 feathers tipped with rufous- white and with fairly distinct 

 black subterminal bands. Bill blackish, the basal three- 

 quarters of the lower mandible pale horn-colour ; feet pale 

 yellowish -brown (in the dried skin). Total length 4"5 

 inches ; culmen 0*5 ; wing 2*05 ; tail 1"8 ; tarsus 0'85. 



Obs. This species is at once distinguished from C. butleri 

 by its much stouter bill and shorter tail, as well as by 

 the much brighter rufous shade of the upperparts and the 

 markings of the outer tail feathers. 



It appears to differ considerably from any known species. 



Hab. Pongo Uiver, Bahr-el-Gazal. 



VOL. XXI. 



