54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



Remarks. — A handsome species, related to B. hivittatus, but with 

 a paler bill, the coronal spot somewhat differently colored (always 

 decidedly JNIars yellow), and the upper parts witli a broAvnish shade 

 by comparison. It was one of Whiteley's discoveries on Mount 

 Roraima, and most of the specimens extant were collected by him. 

 The late Frederick V. McConnell also took specimens on Roraima, 

 and more recently Mr. Beebe has reported it from the Bartica Dis- 

 trict, but I have not seen the specimens on Avhich his record is based. 



Specimens examined. — British Guiana : Mount Roraima (3,500 and 

 5,000 feet), 8. 



BASILEUTERUS TACARCUNAB Chapman 



BasUcuterus tacarcunae Chapman, Amer. Mvm. Nov. No. 143, 1924, p. 6 

 (Mount Tacarcuna, Panama; orig. descr. ; type in coll. Amer. Mus. Nat. 

 Hist), p. 7 (diag. ; range). — Griscom, Amer. Mus. Nov. No. 280, 1927, 

 p. 13, in text (crit.). 



Description. — Pileum with two broad lateral stripes of black, reach- 

 ing the nape, and inclosing a median stripe of ecru olive, becoming 

 more yellowish (olive ocher) on the vertex; superciliaries and sides 

 of the head in general ecru olive, except for a postorbital stripe of 

 black; upper parts, and wings and tail externall}', olive green; under 

 parts barium yellow, j^aler and duller anteriorly, more or less shaded 

 on the breast, sides, and flanks with yellowish citrine; tibiae and 

 under wing-coverts similar ; bill browm above, paler below ; feet pale 

 brown (in skin). 



Measurements. — Male: Wing, 57-66 (average, 62.5); tail, 50-56 

 (53); bill, 10-11 (10.3) ;' tarsus, 19-21 (20). Female (four speci- 

 mens) : Wing, 58-59 (58.5) ; tail, 50-51 (50.5) ; bill, 9-10.5 (9.8) ; 

 tarsus, 19-20.5 (19.5). 



Range. — Subtropical Zone, mountains of extreme eastern Panama. 



Remarks. — The type series is uniform, and evidently represents a 

 form which is specifically distinct from the B. trisfHatus group of 

 conspecies, although closely allied thereto. In its head pattern this 

 species closely resembles B. mendanus., but the coronal stripe has more 

 color; the upper parts are more decided olive green, and the lower 

 parts more yellowish, less bufTy — more as in B. tristriatus auricularis, 

 from which it differs again in the color of the head markings. The 

 discovery of a form with such a combination of charactei-s in a region 

 where we would naturally expect to find a connectant between B. tri- 

 striatxis daedalus and B. tristriatits melanotis is surprising, to say the 

 least, and suggests that " its characters express the results of complete 

 and prolonged isolation," as Doctor Chapman remarks. 



Specimens examined. — Panama: Tacarcuna (4,000-4,200 feet), 3; 

 east slope Mount Tacarcuna (4,600 feet), 11 (including type). 

 Total. 14. 



