344 FRINGILLID ZA. 
Prof, Cabanis under the name of Cyanocompsa. The members of this latter section are 
all stationary species, whereas (. cwrulea is strictly migratory. There is, too, a striking 
uniformity in the colour of the plumage of the former, that of the latter differing both 
in its tint and in the silkiness of the texture of the feathers, and other points mentioned 
below. 
Besides G. cerulea, which passes the winter season within our limits, there are two 
well-defined species of Guiraca, G. parellina and G. concreta, the latter being subdi- 
visible into races, the validity of which as species is perhaps open to question, though 
we have treated them separately. One of these races ((. conereta) extends its range 
from Southern Mexico to Chiriqui; the other is found at Panama, and thence south- 
wards to Colombia and Western Ecuador. 
The bill of G. cwrulea has the culmen nearly straight, the commissure strongly angu- 
lated, the mandible being deep and the rictal bristles well developed. The wings are 
long and pointed, the second, third, and fourth quills being nearly equal and longest, 
the first and fifth being rather shorter. The tail moderate and slightly rounded. The 
tarsus is less than the middle toe and claw. 
In G. concreta the wing is shorter and more rounded; the second, third, and fourth 
are still the longest, but the fifth and sixth are hardly shorter, the first being shorter 
than the secondaries. The bill is stouter in proportion; and the tarsus equals the 
middle toe and claw. 
a. Guiraca. 
1. Guiraca cerulea. V 
Loxia cerulea, Linn. Syst. Nat. i. p. 306’; Wagl. Isis, 1831, p. 525°. 
Guiraca caerulea, Sw. Phil. Mag. n. ser. i. p. 438°; Bp. Consp. Av. p. 111°; Baird, Mex. Bound. 
Surv. ii., Birds, p. 16°; Scl. P. Z. S. 1859, pp. 365°, 878"; 1864, p.174°; Ibis, 1873, 
p. 873°; Salv. Ibis, 1861, p. 852°; Dresser, Ibis, 1865, p. 491"; Lawr. Ann. Lyc. N. Y. 
ix. pp. 102”, 200"; Bull. U.S. Nat. Mus. No. 4, p. 20"; Mem. Bost. Soc. N. H. ii. p. 275%; 
Sumichrast, Mem. Bost. Soc. N. H.i. p.552° ; Dugés, La Nat. i. p.189; Frantz. J. f. Orn. 
1869, p. 801°; Baird, Brew., & Ridgw. N. Am. B.u. p. 77"; Gundl. Av. Cub. p. 95°; 
5] 
Boucard, P. Z. 8. 1883, p. 44477; Nutt. & Ridgw. Proc. U.S. Nat. Mus. vi. p.3892”; Coues, 
Key N. Am. B. ed. 2, p. 890”. 
Coccoborus ceruleus, Cab. Mus. Hein. i. p. 152; Finsch, Abh. nat. Ver. z. Bremen, 1870, 
p. 8389”. 
Goniaphea cerulea, Scl. P. Z. S. 1856, p. 301*°; Sennett, Bull. U.S. Geol. Surv. iv. p. 19"; v. 
p-. 892”. 
Saturate cerulea, interscapulio saturatiore; loris, alis et cauda nigris, tectricibus alarum mediis et majoribus 
castaneo terminatis fascias duas formantibus, secundariis quoque extus castaneo limbatis; rostro corneo, 
pedibus corylinis. Long. tota 6°0, ale 3:4, caude 2:5, rostri a rictu 0-7, tarsi 0-8. (Descr. maris ex 
Choctum, Guatemala. Mus. nostr.) 
@ fusco-brunnea, subtus dilutior, alis et cauda fusco-nigris illis brunneo bifasciatis. (Descr. femine ex Presidio, 
Mexico. Mus. nostr.) 
Obs. Mas juv. colore ceruleo undique brunneo intermixto. 
