346 FRINGILLIDZ. 
Mem. Bost. Soc. N. H.i. p. 551°; Lawr. Ann. Lyc. N. Y. ix. p. 102"; Frantz. J.f£. Orn. 
1869, p. 801”; Nutting & Ridgw. Proc. U. 8S. Nat. Mus. vi. p. 400”. 
Nigra cyaneo vix tincta; fronte, genis et tectricibus alarum minoribus cyanescentioribus, rostro et pedibus 
nigris. Long. tota 6°0, ale 3:2, caude 2-7, rostri a rictu 0°8, tarsi 0-9. (Descr. maris ex Orizaba, Mexico. 
Mus. nostr.) 
 omnino brunnea, subtus paullo dilutior, alis et cauda saturatioribus. (Descr. femine ex Choctum, Guate- 
mala. Mus. nostr.) 
Hab. Mexico }, Orizaba (Salle), Santecomapam *, Playa Vicente + (Boucard), Petula 
(Sumichrast ©); Brurisn Honpuras (Blancaneaux); GuatemMata, Yzabal 5, Choctum 
(O. S.); Honpuras, San Pedro (G. M. Whitely °); Nicaraaua, Chontales (Janson °), 
Los Sabalos (Nutting 1°); Costa Rica (v. Frantzius!*), Turrialba, Angostura (Car- 
miol 11); Panama, Santa Fe’, Calovevora ®, Boquete de Chitra *, Bugaba ® (Arcé). 
Guiraca concreta does not appear to be found northwards of the hot forests of the 
State of Vera Cruz in Mexico, the limit of its range in altitude being, according to 
Sumichrast, about 2500 feet 1°. In Guatemala we found it always in the heavily-forested 
districts at the sea-level near Yzabal®> and at Choctum, which is about 1200 feet 
above the sea. In Nicaragua Mr. Nutting says it is abundant near Los Sabalos, 
especially in a plantain-grove, and also in a patch of high marsh-grass 28, 
The typical Mexican form of this species is easily recognized from the Panama bird, 
G. cyanoides, by its much darker tint, in which there is but a slight blue shade, and the 
forehead and cheeks are scarcely bluer than the rest of the plumage. Guatemalan 
specimens, and all from various parts southwards as far as the province of Veraguas, are 
somewhat intermediate in character ; the blue tint, so distinct in G. cyanoides, is decidedly 
apparent, and the forehead and cheeks are obviously blue, though not so much so asin 
the southern form. When we reach Panama itself, whence the type of G. cyanoides 
was obtained, the difference in the amount of blue of the plumage is tolerably obvious ; 
moreover, the distinction seems sufficiently marked and abrupt to justify our separating 
Central-American and Panama specimens. But we should not be surprised to find 
either that the former can be distinguished from the blacker Mexican bird or that all 
these races merge into one species. For the present we place the Central-American 
and Mexican birds under the name G. concreta, and keep C. cyanoides of Panama 
distinct ; and this has been the usual practice up to now. 
3.1 G@uiraca cyanoides. 
Coccoborus cyanoides, Lafr. Rev. Zool. 1847, p. 74’. 
Cyanoloxia cyanoides, Bp. Consp. Av. i. p. 502*; Lawr. Ann. Lyc. N. Y. vii. p. 297°. 
Guiraca cyanoides, Scl. & Salv. P. Z. S. 1864, p. 852‘; 1879, p.506°; Berlepsch & Tacz. P. Z. S. 
1883, p. 549°, 
G. concrete similis, sed omnino cyanescentior; fronte, genis et tectricibus lete cyaneis. (Desc. maris ex 
Lion Hill, Panama. Mus. nostr.) 
Hab. Panama!?, Lion Hill (*Leannan ?4).—Cotompia®; Ecuapor °. 
