FALCONID.E — THE FALCONS. 



223 



American species are intimately related to the two North American ones, 

 and may prove to be only climatic races of the same species ; thus, enjthroc- 

 nemis, Gray (Hand List, p. 32, No. 305) may be the intertropical form of 

 fuscus, and chilensis, Ph. and Landb. (Hand List, No. 314), that of coopcri. 

 But the material at my command is too meagre to decide this. 



26588, ^. 



Nisus cooperi. 



10T59 , 



Nisus cooperi. 



Nisus fusrus. 



In consequence of the insufficient material for working u}) the South 

 American species, I shall omit them all from the following synopsis of the 

 North American species and races.^ 



Species and Races. 



Common CnARACTERS. Adult Above bluish slate-color; the tail with obscure 

 bands of darker, and narrowly tipped with white. Beneath tiansversely barred 

 with white and pinkish-rufous ; the anal region and crissum inmiaculate white. 



1 In the collection of the National Museum are two specimens of cooperi, var. gundlachi, in the 

 young phimage. They differ from the young of var. cooperi merely in darker colors, the brown 

 markings being larger and more numerous, as well as deeper in tint. That their character may 

 be better understood, I furnish the following more detailed descriptions : — 



Young vinJe (41,129, Cuba, Dr. Gundlach). Above dark, blackish vandyke-browii, the feath- 

 ers bordered inconspicuously with dark rusty ; tail dull slate, naiiowly tipped with ashy-white, 

 and crossed with four broad bands of dusky, almost e(puil to the .slate ; beneath white, much tinged 

 on breast and tibiae with reddish -ochraceous ; thickly striped with umber-brown, except on cris- 

 sum ; the streaks on throat narrow and cuneate, those on breast broad, and on sides changing into 

 broad transverse spots or liars ; tibise thickly spotted transversely with more reddish, nearly rufous, 

 brown ; larger lower tail-coverts with narrow shaft-streaks of black. Occiput showing much con- 

 cealed white ; the ends of the feathers deep black. Wing, 8.60 ; tail, 7.50 ; culmen, .68 ; tar- 

 sus, 2.50; middle toe, 1.70. 



Young female (41,128, Cuba, Dr. Gundlach). Similar, but more thickly striped beneath, the 

 dark markings about ecpialling the white in extent ; whole sides with large transverse spots of 

 umber, cuneate along shaft. Wing, 10.50; tail, 9.50. 



The synonomy of this race is as follows : Accipiter gundlachi, Lawrence, Ann. X. Y. Lye. 

 VII, May, 1860, 252. — Gund. Rep't, 1865, 224. — Scl. & Salv. Ex. Orn. I, 170. — Gray, 

 Hand List, I, 33, No. 319. The N. fuscus, var. fringilloides (Vigors), of Cuba, I have not 

 seen. Its synonomy stands as follows : Accipiter fringilloides, ViG. Zool. Journ. Ill, 1826, 534. 

 — Lawr. Ann. N. Y. Lye VII, 1860, 255 (with descriptions and synonomy).— Gundl. Kep't, 

 1865, 224. —Gray, Hand List, I, 32, No. 311. 



