( 355 ) 



Nos. 84, 363, 364, 476. ? ? imm., Calaraa, 21. vi., 10, 28. viii. 19u7.— Wiiig 

 59—62 ; tail 40—42 ; bill 15— 16i mm. 



No. 764. cJ ad., Allianca, 8. xi. 1907.— Wing 59 ; tail 39 ; bill 15 J mm. 



Nos. 952, 966, 1029. S6 acl, Marniiis, 28. vi., 1, 17. vii. 1908.— Wing 58—60; 

 tail 39; bill 15—16 mm. 



Nos. 951, 972. ? ? ad., Maniins, 28. vi., 5. vii. 1908. -Wing 59; tail 40 1 ; 

 bill 15 mm. 



" Iris grey or brown, feet pale yellow or reddish yellow, bill black." 



The series agrees perfectly with another from Eastern Ecnador (Napo) and 

 several examples from Pern. Adult males have the top of the head slate-grey, 

 the markings on the wings and the ronnded spots of the interscapnlinm pure white 

 or very nearly so, the basal ()ortion of the tail clear ashy or bnt faintly tinged with 

 olive, and the flanks as well as nnder tail-coverts very pale creamy buff. Immature 

 males are mnch browner above, the pale markings on wings and back bright buff, 

 and the flanks much more extensively and deeper ochraceous buff. Adult females 

 differ from young ones merely by having the pileum more mixed with 

 slate-grey. 



The above variation is well illustrated by the two series from the Napo and 

 Rio Madeira respectively. 



As first pointed out by M(5n6ganx & Hellmayr,* two forms had been 

 confounded nnder the name of //. theresae. In the following lines I give a 

 condensed n'sum^ oi their characters, range, and synonymy: — 



(a) Hypocnemis naevia naecia (Gm.). 



Pipm naevia Gmelin, S//s/. Nut. 1. ii. p. 1003 (1789.— bx D'Aulienton, PI. enl. tab. 823. fi». 2 



= jj : Cayenne) ; Latham, hid. Ornilh. ii. 1790. p. 559 (based on the same) ; Shaw, Gen. Znol. 



X. i. 1817. p. 32 (based on the same). 

 Conopophaga naer/ii. VieiUot, Xonr. Did. vii. 1817. p. 458 (based on the same). 

 Bypocnemii) naevia Pelzeln, Ziir Orn. Bran. ii. 1868. p. 89 (Marabitanas, Rio Negro, Natterer coll. ; 



Cayenne : ex Becoeur) ; Berlepsch, Noi\ Zool. xv. 1908. p. 159 (Ipousin, R. Approuague, 



Cherrie coll.). 

 H. naevia naecia M^negaux & Hellmayr, Bull. So<: Philomat. Paris 1906. p. 44 (Cayenne ; crit.). 

 ff. thereme (nee Des Murs) P. L. Sclater, Cat. Birds Brit. Mus. xv. 1890. p. 292 (part. : specimens 



fl, b, ex Oyapoc, Cayenne) ; M^negaux, Bull. .Mns. Paris x. 1904. p. 177 (Camopi, Cayenne, 



Geay coll.). 



Hab. French Guiana : Cayenne (Bnflbn, Becoeur), Oyapoc (Verdey), Ipousin, 

 Rio Approuague (Cherrie), (Jamopi (Geay), Saint-Jean-du-Maroni (Le Monlt ; Mus. 

 Monac). North Brazil : Marabitanas, upper Rio Negro (Natterer). 



6 ad. Above intense rufous brown, top of the head like the back, only the 

 forehead slate-grey ; a restricted patch in the middle of the interscapular region 

 black, marked with small, drop-shaped spots of pale buff. Tertials bright rufous 

 brown, with a buff apical spot, preceded by a black snbterminal band. Rectrices 

 bright rufous brown, with a well-defined black subterminal bar, from 3 to 2 mm. 

 wide, and a narrow buffy white apical margin. This measures about 1 to 2 mm. 

 in width on the outer tail-feathers, but is scarcely indicated by a whitish fringe 

 on the central pair. Sides of breast and abdomen as well as crissum bright 

 ochraceous. 



Wing 57 — 61 ; tail 37 — 42 mm. 



¥ ad. Agrees in the specific characters with the male. Under surface bright 

 ochraceous ; throat rather paler, more buff, bordered on each side by a narrow black 

 malar streak. 



• Bvll. Soe. Philomat. Paris 1906. pp. 45-6. 



