112 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
sometimes brownish; length (skins), 124-140 (132); wing, 64-69.5 
(66.4); tail, 42.5-50 (45.2); culmen, 19-21 (20); tarsus, 27.5-31 
(28.3); middle toe, 16.5-19 (17.9).¢ 
Caribbean slope of Panam4é (Lion Hill; Frijole station; Chepo; 
Panama; Cascajal, Coclé), Costa Rica (Jiménez; Siptrio; Talamanca; 
Angostura; Rio Reventazén; Guécimo; Guapiles; Cuabre; Rio Sicsola; 
Siquirres; La Cristina; Carrillo; Limén; La Balsa; Turrialba; Volcan 
de Turrialba; El Hogar; Rio Banana; La Vijagua; Pacuare) and 
Nicaragua (Los Sébalos; Rio Escondido; Chontales; San Emilis, Lake 
Nicaragua). 
Myrmeciza exsul SctaTER, Proc. Zool. Soc. Lond., 1858 (pub. 1859), 540 (Panama; 
coll. Derby Mus.).—Carrixer, Ann. Carnegie Mus., vi, 1910, 614 (Caribbean 
lowlands up to 2,000 ft., Costa Rica; crit.; habits; descr. nest and eggs). 
M{yrmeciza] exsul Hettmayr, Verh. k. k. zool.-bot. Gesellsch. Wien, 1903, 215 
(diagnosis). 
Myrmelastes exsul exsul Hettmayr, Novit. Zool., xiii, 1906, 341 (Panamé4; e. Costa 
Rica; Rio Escondido and Chontales, Nicampua: crit.; synonymy). 
Myrmeciza immaculata (not Thamnophilus immaculatus Lafremaye) ScLaTEeR and 
Satvin, Proc. Zool. Soc. Lond., Oct. 1, 1864, 357 (Lion Hill, Panamé; coll. 
Salvin and Godman).—Lawrence, Ann. Lyc. N. Y., ix, 1868, 109 (Pacuare 
and Angostura, Costa Rica; crit.).—Frantzius, Journ. fiir Orn., 1869, 305 
(Costa Rica).—Nutrine, Proc. U.S. Nat. Mus., vi, 1883, 405 (Los Sébalos, 
Nicaragua; habits).—ZeLepon, Anal. Mus. Nac. Costa Rica, i, 1887, 115, 
part (Pacuare and Jiménez, Costa Rica).—SciaTErR, Cat. Birds Brit. Mus., 
xv, 1890, 279, part (Panam4 and Chepo, Panamé4;- ‘‘ Valza,’”’ i.e. La Balsa, 
Costa Rica).—Satvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, pl. 51, 
figs. 2, 3. [Myrmeciza] immaculata SctaTER and Satvrn, Nom. Av. Neotr., 
1873, 74. 
Myrmeciza intermedia CHERRIE, Proc. U. 8. Nat. Mus., xiv, no. 355, Sept. 4, 1891, 
345 (Siptrio, Talamanca, Costa Rica; coll. U. S. Nat. Mus.). 
Myrmelastes intermedius Satvin and GopMAN, Biol. Centr.-Am., Aves, ii, 1892, 
227, part (Los Sébalos, Nicaragua; Pacuare, Angostura, La Balsa, Jiménez, 
and Carrillo, Costa Rica; Lion Hill and Chepo, Panam4).—Ricumonp, Proc. 
U. S. Nat. Mus., xvi, 1893, 502 (Rio Escondido, Nicaragua; habits).— 
Banes, Proc. New Engl. Zool. Club, ii, 1900, 25 (Loma del Leén, Panamé). 
[ Myrmelastes] intermedius SHarre, Hand-list, iii, 1901, 32. 
Myrmelastes occidentalis intermedius CARRIKER, Ann. Carnegie Mus., v, no. 1, 
Oct. 1, 1908, 10, in text. 
© Fourteen specimens. 
Locality. Wing. | Tail. ve iris ge ora 
MALES, 
Six adult males from‘eastern Panama. .............-.---..+--- 67.4 47.2 19.4 28.4 17.8 
Ten adult males from eastern Costa Rica (8) and Nicaragua (2)..| 67.4 46.5 20.6 28.1 18 
FEMALES. 
Four adult females from eastern Panamé.............-.-.-..-- 66.6 45.4 20.1 27.9 18 
Ten adult females from eastern Costa Rica (8) and uusacen (2).| 66.3 45.2 20.1 28.5 17.9 
