( 3.V ) 



the back), and the throat finely nmliihited with greyish (instead of niiiform bi-ight 

 buff). The wings, too, are considerably shorter. 



The distribution of these two allied forms is as follows : 



1. Dendrodnclu turdiim (Lcht.). 



Dendrocolaptcs lurduius Lichtenstein, Abhuiull. Akail. Berlin n. d. ./. lSlt>-l:) (pulil. lS:iO), p. 2il-t, 

 tab. ii. fig. 1 [i5«/u« ; cfr. 1. c. a. d. J. 1820-21 (publ. 1822), p. 2i;4J. 



Eastern Brazil from Bahia to Santa Catharina.* 



2. JJendrocincla atrirontris (Lafr. & D'Orb.). 



Eastern Bolivia : (lUarayos (D'Orbigny), San llaleo (G. (iiirlepji cull.) — Central 

 Brazil, Western Mattogrosso : S. Vicente on the It. Guapore (Natterer coll.). 



I hope that the following key will help ornithologists to recognise the species 

 allied to D. turdina. 



A. Top of the head finely striated with bulF. 



a. E.xposed portion of remiges olivaceous brown, 

 hardly different in colour from the back. 

 Thi'oat bright buff. Scarcely any indi- 

 cation of a postocular streak. Wing 

 about lU-4 — 114 mm. Hab. Eastern Brazil 

 (Bahia to S. Catharina) . . . . JJ. turdina (Lcht.).t 



I). E."vposed portion of remiges bright cinnamon 

 rnf'ous, very different from the colour of the 

 back. A broad ochraccous postocular 

 streak. Throat finely undulated with 

 greyish. Wing 95 — 99 mm. Hab. Eastern 

 Bolivia and Mattogrosso .... U. atrirostris (Lafr. & Uib.). 



B. Toj) of the head uniform. 



c. Upper wing-coverts deep dark chestnut like 

 the outer web of the remiges. Anterior 

 portion of throat distinctly whitish. Hab. 

 Cayenne, Surinam, Brit. Guiana ; Orinoco 

 region ; Lower and Upper Amazonia . . D. morula (Lcht.).+ 



'/. Upper wing-coverts olive-brown, very different 



from the cinnamon or cliestnut rufous 



colour of the remiges. No whitish jjatch 



on the throat, 

 a'. A broad ochraccous postocnlar streak 

 from behind the eye to the ])osterior 

 edge of the ear-coverts. Lower throat 

 with narrow, but distinct, buffy shaft- 

 lines or dots. Hab. Cayenne, Guiana, 

 Lower Amazonia .... D.fuliijinosa (Vieill.).§ 



* Specimeu in Mu3. Deilupocb (HjavupcuU.). J 13 specimens, 



t 17 specimens. § 15 specimens. 



