344 rEINGILLIDiE. 



Prof. Cabanis under the name of Cyanocompsa. The members of this latter section are 

 all stationary species, whereas G. ccerulea 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. ccerulea, which passes the winter season within our limits, there are two 

 well-defined species of Guiraca, G. parellina and G. cmcreta, 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 {G. coTicreta) 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. ccerulea 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 cserulea. 



Loosia carulea, Linn. Syst. Nat. i. p. 306 ^ ; Wagl. Isis, 1831, p. 525 ". 



Guiraca c/erulea, Sw. Phil. Mag. n. ser. i. p. 438®; Bp. Consp. Av. p. Ill*; Baird, Mex. Bound.. 



Surv. ii.. Birds, p. 16^ Scl. P. Z. S. 1859, pp. 365 % 878''; 1864, p. 174 ^ Ibis, 1873, 



p. 373 '; Salv. Ibis, 1861, p. 352"; Dresser, Ibis, 1865, p. 491 " ; Lawr. Ann. Lye. N. Y. 



ix. pp. 102 '^ 200 " ; Bull. U.S. Nat. Mus. No. 4, p. 20 " ; Mem. Best. Soc. N. H. ii. p. 275" ^ 



Sumichrast, Mem. Bost. Soc. N. H. i. p. 552 '" ; Duges, La Nat. i. p. 139 " ; Frantz. J. f. Om. 



1869, p. 301 ''; Baird, Brew., & Bidgw. N. Am. B. ii. p. 7'!^^; Gundl. Av. Cub. p. 95=°; 



Boucard, P. Z. S. 1883, p. 444 " ; Nutt. & Ridgw. Proc. U.S. Nat. Mus. vi. p. 392 "=' ; Coues,. 



Key N. Am. B. ed. 2, p. 390 ''. 

 Coccoborus ceeruleus, Cab. Mus. Hein. i. p. 152 '* ; Finsch, Abb. nat. Ver. z. Bremen, 1870,. 



p. 339=^ 

 Goniaphea ccBmlea, Scl. P. Z. S. 1856, p. 301'°; Bennett, Bull. U.S. Geo!. Surv. iv. p. 19"; v. 



p. 392'^ 



Saturate csenilea, interscapulio saturatiore ; loris, alls et cauda nigris, tectrioibus alarum mediis et majoribus- 

 castaneo terminatis fascias duas formantibus, seoundariis quoque extus castaneo limbatis ; rostro oorneo, 

 pedibus corylinis. Long, tota 6-0, alse 3-4, caudae 2-5, rostri a rictu 0-7, tarsi 0-8. (Descr. maris ex 

 Choetum, Guatemala. Mus. nostr.) 



2 fusco-brunnea, subtus dilutior, alis et cauda fusco-nigris iUis brunneo bifasciatis. (Descr. feminee ex Presidio,. 

 Mexico. Mus. nostr.) 



Ohs. Mas juv. colore cseruleo undique brunneo intermixto. 



