( 2t > ) 



b. 11. Uucopkrys angustirostris (Cab.), Cayenne, Surinam, British Guiana, 

 South Guiana (Counany-Goeldi), west to the Orinoco region ; Amazonia : 

 from Santarem west to the Rio Madeira (Borba) and Rio Jimia (Garbe— 

 Mus. Panlista). 



48. Hypocnemis myotherina ochrolaema Hellm. 

 B. m. ochrdaema HellmayT, Bull Brit. Orn. CI. xvi. (June 1900), p. 109. 



Nos. 450, 513. 6 6 ad., Itaituha, 16, 31. i. 06. " Iris dark red, feet grey, bill 

 black."— Wing 64 ; tail 37, 40 ; bill 17 mm. 



No. 520. ? ad., Itaituha, 31. i. 06. " Iris brown, feet light grey, lull black. 

 —Wing 62 : tail 38 ; bill 17 mm. Type of the subspecies. 



The 6 of this new form resembles that of II. m. melanolaema Scl. in the 

 paleness of the nnderparts, but breast and abdomen are even lighter, nearly white 

 in the middle. The white band across the forehead (behind the black frontal edge) 

 is more distinct, and the white eyebrow much better defined and considerably 

 broader, especially above and behind the ear-coverts, where, in //. m. melanolaema, 

 only a narrow, dull greyish white stripe is to be seen. 



The ¥ has the breast and abdomen of the same dark ochraceons colour as that 

 of //. m. melanolaema, but is readily distinguishable by having the entire throat 

 deep ochraceons like the rest of the under-snrface (not white), as well as by its 

 entirely black bill. There are no blackish spots on the foreneck, which are more or 

 less pronounced in //. m. myotherina and H. m. melanolaema, and the back is of a 

 duller, more greenish brown hue. 



Having had the opportunity of studying a considerable amount of material, 

 I think it useful to give a short review of the three forms of the II. myotherina 

 group, which, owing to lack of sufficient series, were not well understood hitherto. 



a. Hypocnemis myotherina myotherina (Spis). 



Thamnophilw myotherinus Spix, Av. Bras. ii. (1825) p. 30, pi. xlii., fig. 1 = 6 (part. : descr. of 



male only ; no locality given). 

 Uyioihera thamttophiloides Voigt, Thierrelch i. (1831), p. 4u4 (new name based on Spix's 



figure). 

 Eypocnemh elegam Sclater, P.Z.S. 1857, p. 47 (ex "Bypocnemist" idem, I.e. 1855, p. 147.- 



Bogota, coll., descr. orig. $ ). 



Hah. From Eastern Colombia (Bogota coll.) through Eastern Ecuador to the 

 north bank of the Amazons (Pebas, Nauta), N.E. Pern; also found on the Caura 

 River, a southerly tributary of the Orinoco, Venezuela. 



6 ad. Breast and abdomen uniform grey (Ridgw. Nomencl. ii. 6). Pale band 

 behind the black frontal edge and superciliary stripe rather indistinct, greyish 

 white, the latter uot continued along posterior edge of the black ear-coverts. 



? ad. Lower mandible yellowish white or yellowish grey. Throat pure 

 white, bordered below by a number of small blackish spots, and sharply defined 

 against the deep ochraceons colour of the breast and abdomen. 



Wing 62—67 ; tail 3*— 43; bill 17—18 mm. 



Material. --'Jo' ad., 2 66 jr., 5 ? ?, Bogota coll. :6 6 6 ad., 2 66 jr., 3 ? ?, 

 Easi Ecuador ; 2 6 6 ad., 1 6 jr., ? ?, Caura River, Venezuela ; 6 * ad., Pcb;is 

 (Castelnan coll., Mus. Paris); 6i ad., Rio Tigre, near Nauta (Hauxwell coll., 

 Mus. Berlepsch). 



