Ridgway.] 84: [May 21, 



than the black ones. Inner webs of primaries crossed about the 

 middle, by a single oblique series of large quadrate spots of white. 



a. Wing, 10.00-11.00; tail 8.00-8.50; culmen, .68-.80 ; tarsus, 



2.90-3.10; middle toe, 1.12-1.35. Color, bluish plumbeous, 

 without light bars, except on the tibiae and lining of the 

 wing. Hab. Tropical America south of Panama. 

 var. ccerulescens. 



b. Wing, 12.00-13.80; tail, 10.00-11.00; culmen, .80-.85 ; tar- 



sus, 3.30-3.60; middle toe, 1.40-1.60. Color, plumbeous- 

 black, the lining of the wing, tibiae, and crissum — sometimes 

 entire lower parts — obscurely and narrowly barred, with 

 white. Hab. Tropical America north of Panama. 

 var. niger. 



1. Geranospiza gracilis (Temminck). 

 Falco gracilis Temm., PI. Col. 91, 1823. 



Astur gracilis Vig., Zool. Journ. i, 338. — Steph., Zool. xn, pt. 2, 



26. — Gray, List B. Brit. Mus. 1844, 33. — Lafr., R. Z. 1848, 



242.— Kaup, Ueb. Falk. Mus. Senk., 249. 

 Nisus gracilis Less., Man. Orn. I, 96 ; Tr. Orn., 63. 

 Ischnocelis gracilis Strickl., Ann. N. H. xm, 409; Orn. Syn. I, 



1855, 124. 

 Geranospiza gracilis Gray, Gen. B. fob, sp., i ; List B. Brit. Mus., 



68 ; Hand List, i, 31, no. 289 (in part). — Bonap., Consp., 30. 

 Geranopus gracilis Kaup, Monog. Falc, in Contr. Orn. 1850, 65. — 



PeL*, Orn. Bras., 398. 

 Hab. Eastern South America (Paraguay and Brazil). 

 Specimen» examined. Nat. Mus., 4; Philad. Acad., 3 ; N. Y. Mus., 

 2 ; Boston Society, 3. Total, 12. 



2. Geranospiza cserulescens (Vieillot). 

 a. var. cserulescens Vieill. 



Sparvius ccerulescens Vieill., Nouv. Diet, x, 318; 1817. — Id. Enc. 



Meth. in, 1262. — Pucher., R. Z. 1850, 90. 

 Ischnoceles ccerulescens Strickl., Orn. Syn. I, 124. 

 Falco hemidactylus Temm., PL Col. 3, 1820. — Max., Beitr. in, 97. 

 Astur hemidactylus Vig., Zool. Journ. I, 338. — Steph., Zool. xni, 



pt. 2, 26.— Kaup, Ueb. Falk. Mus. Senk., 249. 

 Nisus hemidactylus Less., Man. Orn. I, 96. — Id. Tr. Orn., 63. — 



Cuv., Reg. An. ed. 2, I, 333.— D'Orb., Voy. Am. Mer., 88.— 



Schleg., Mus. Pays-Bas. Astures, p. 53 (in part). 





