11 GO MR. C. E. UELI.MAYR ON THE. 



Characters and range of the two races are as follows : — 



(a) M. SURINAMENSIS SURINAMENSIS Gm. 



Sitta si(,rinamensis Gmelin, Syst. jSTat. 1, i. p. 442 (1788 — 

 based on : " Surinam Nuthatch,", Latham, Gen. Syn. 1, ii. p. 654, 

 pi. 28 (= $): Surinam). 



Formicivora qimdrivittata (ex Lichtenstein MS.) CalDanis, 

 Arch. f. Naturg. 13, i. p. 227 [1847.— Guiana (Schomburgk)]. 



Mynnotherula suriiiamensis Sclater, Cat. B. Brit. Mus. xv. 

 p. 231 (part.: m-q, Brit. Guiana; v, Cayenne); Salvin, Ibis, 

 1885, p. 425 (Camacusa) ; Bei-lepsch & Hartert, Nov. Zoo), ix. 

 1902, p. 73 (Caura) ; Berlepsch, Nov. Zool. xv. p. 154 (Cayenne). 



Adult. Bill short and slender ; white tips to external rectrices 

 restricted, not more than li to 3 mm. wide on outermost pair. 

 Upper back, in both sexes, mostly black, variegated with narrow- 

 Avhite edges, base of feathers extensively white, forming a large, 

 concealed dorsal patch. Female with upper part of the head deep 

 tawny, crown and nape broadly streaked with deep black ; sides 

 of the head, throat, foreneck and chest bright ochraceous, middle 

 of throat sometimes paler, ochraceous-bulf or buff : rest of lower 

 parts buff, flanks shaded with greyish. On the sides of the neck 

 and chest there are sometimes a few faint dusky shaft-lines, but 

 in most specimens these parts are quite uniform. 



JIab. Surinam : Paramaribo (Chunkoo : Tring Museum) ; 

 French Guiana: Approuague, Ipousin ( CAerr/e : Tring Museum), 

 Saint-Jean-du Maroni (Le Moult : Munich Mus.) ; British 

 Guiana : Camacusa, Takutu B., Carimang R. {Whitehj). East 

 Venezuela, Caura Yalley : Nicare, La Pricion, Suapure, Mato B. 

 {Andre, Klages -. Tring and Munich Mus.)*. 



Material. 22 specimens. Birds from various localities measure 

 as follows : — 



Two S (S ad. Camacusa , British Guiana. — Wing 50, 52 ; tail 25, 



26; bill 14, 15 mm. 

 Two c? 6 ad. Paramaribo, Surinam. — Wing 50, 52 ; tail 25, 



25i ; bill 14 mm. 

 Three S 6 ad. French Guiana.— AVing 49-51 ; tail 24-25 ; 



bill 14-15 mm. 

 Five S 6 ad. Caura R., Venezuela. — Wing 52 ; tail 25-27 ; 



bill 14-15 mm. 

 Two $ $ ad. Surinam.— Wing 49; tail 24|-25 ; bill 14 mm. 

 One 5 ad. Carimang R., British Guiana. — Wing 50^ ; tail 26 ; 



bill 14| mm. 

 Two 5 $ ad. French Guiana.— Wing 49, 50 ; tail 24, 25 ; 



bill 14 mm. 

 Five $ 2 ad. Caura R., Venezuela. — Wing 49-50; tail 25- 

 27; bill 14^-15 mm. 



* It must remain doubtful, in the absence of females, whether the sinojle male from 

 Munduapo, Upper Orinoco {cfr. Nov. Zool. ix. p. 731 is re.''erable to M. s. surinamensis ■ 

 or to Jf. s. multostriata. 



