118 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Ramphocahiti dlmldiatus (?) Salvin, Proo. Zool. Soc. Lond., 1867, 138, part (David, 

 Chiriqui). — ScLATERand Salvin, Proc. Zool. Soc. Lond., 1879, 501 (Aiitioquia, 

 Colombia). 



\_Ramphocoelus] dimidiatus Sclater and Salvin, Nom. Av. Neotr., 1873, 21, part. 



Ehamphoccelus dimidiatus Salvin and Godman, Ibis, 1880, 120 (Santa Marta, 

 Colombia); Biol. Centr.-Am., Aves, i, 1883, 283, part. — Sclater, Cat. Birds 

 Brit. Mus., xi, 1886, 172 (San Antonio and Remedios, prov. Antioquia, etc., 

 Colombia; Ziilia, Venezuela, etc.). — Salvin, Cat. Strickland Coll., 1882, 191 

 (Bogota). — Berlepsch, Jour, fiir Orn., 1884, 291 (Bucaramanga, Colombia). 



R[}minpliocelus'\ dimidiatus Cabanis, Mus. Hein., i, 1850, 25 (Colombia). 



RharnpJiorelus dimidiatus Sto'Ne, Proc. Ac. Nat. Sci. Phi la., 1899, 307 (Ambalema 

 and Ibague, centr. Colomlna). 



R^aynphopisl dimidiatus Gray, Gen. Birds, ii, 1844, 363. 



Ramphocelus dimidiatus dimidiatus Ridgway, Proc. Wash. Ac. Sci., iii, Apr. 15, 

 1901, 150, in text. 



RAMPHOCELUS DIMIDIATUS ISTHMICUS Ridgway. 

 PANAMA CRIMSON-BACKED TANAGER. 



Similar to H. d. dimidiatus^ but tiiil loiioer; adult male with colors 

 le.ss bright, the red not so pure, the black abdominal patch more 

 brown; adult female with head and neck decidedly lighter brown and 

 coloration in general decidedl}' lighter and duller. 



Adult ma/6^— Length (skins), 156.2-160 (158); wing, 7S.Y-79.2 

 (78.7); tail, 72.4-75.9 (73. 9);. exposed culmen, 13.5-U (13.7); greatest 

 width of mandibular rami, 4.8-5.3 '(5.1); tarsus, 20.3-22.1 (21.1); 

 middle toe, 14-15.2 (14.5).^ 



Adult female.— -IjQngth (skins), 152.4-170.7 (163.1); wing, 73.7- 

 78.7 (75.9); tail, 68.3-78.7 (72.1); exposed culmen, 13.2-15.2 (14.2); 

 greatest width of mandibular rami, 4.3-4.6 (4.3); tarsus, 20.8-22.1 

 (21.3); middle toe, 13-14.5 (13.5).' 



Isthmus of Panama (Frijole and Lion Hill stations, Panama Rail- 

 road; Panama). 



Ramphocelus dimidiatus (not of Lafresnaye) Lawrence, Ann. Lye. N. Y., vii, 



1861, 331 (Lion Hill, Panama R. R. ). — Sclater and Salvin, Proc. Zool. 



Soc. Lond., 1864, 350 (Lion Hill).— (?) Salvin, Proc. Zool. Soc. Lond., 1870, 



187, part (Castillo, Chitra, Cordillera delChucu, and Calovevora, Veragua). 

 (?) Ramphoco'lus diinidiatus Salvin, Proc. Zool. Soc. Lond., 1867, 138 (Santa Fe, 



Veragua) . 

 Rhatnpltocelus dimidiatus Hangs, Proc. New Engl. Zool. Club, ii, 1900, 30 (L(jma 



del Leon, Panama R. R. ). 

 [RampJiocxelus'] dimidiatus Sclater and Salvin, Nom. Av. Neotr., 1873, 21, part. 

 Rluiinphocoelus dimidiatus Salvin and Godman, Biol. Centr.-Am., Aves, i, 1883, 



283, part (Paraiso Station, Panama, etc., Panama R. R. ). 

 Ramphocelus dimidiatus isthmicus Ridgway, Proc. Wash. Acad. Sci., iii, Apr. 15, 



1901, 150 (Frijole Station, Panama R. R.; coll. U. S. Nat. Mus.). 



^ Four specimens. * Seven specimens. 



