FALCONID^E. 55 



Falco unicolor Swains. Classif. of B. ii. p. 212. 



Falco tibialis (Daud.) var. Kaup, Isis, (1847) and Correct. ; Le- 



vaill Ois. tfAfr. t. 29. 

 Falco (Hypotriorchis) concolor Kaup, Classif. der Saug. und Vog. 



p. 111. 

 Falcc (^Esalon) concolor Kaup, Isis, (1847) p. 60. 



Swains. B. of W. Afr. i. pi. 3. ; Gould, B. of Eur. pi. 25. 



a. Western Africa. Presented by Col. Sabine, R.A. 



b. Western Africa. From Mr. Kendall's Collection. 



6. HYPOTRIORCHIS ^SSALON. The Merlin. 



Hypotriorchis aesalon G. R. Gray, Gen. of B. p. 



Falco agsalon Gmel. S. N. i. p. 284. ; Yarrell, Brit. Birds, i. p. 53. ; 



Brehm, Vog. Dents, i. p. 68. ; Pall. Zoogr. i. p. 336. t. 7. 

 Falco caesius Meyer, Taschenb. Dents, i. p. 60. 

 Falco lithofalco Gmel. S. N. i. p. 278.; Brehm, Vog. Deuts. i. p. 67. 

 Falco regulus Pall. Iter. ii. p. 707. 

 Falco sibiricus Shaw, Gen. Zool. vii. p. 207. 

 Falco smirillus Sav. Descr. de TEgypte, Hist. Nat. i. p. 100. 

 ^Esalon lithofalco Kaup, Naturl Syst. (1829) p. 40. 

 Falco (^Esalon) lithofalco Kaup, Mus. Senchenb. (1845) p. 258.; 



PL enl. 447. ; Gould, B. of Eur. pi. 24. 



a. Devonshire, male. From Col. Montagu's Collection. 



b. Somersetshire, young female. From Col. Montagu's Col- 



lection. 



c. Europe, male. 



d. Europe, young male. 



e. Europe, female. 



f. Sternum, England. 



g. Sternum, England. Presented by T. Ingall, Esq. 

 h. Sternum, England. Presented by John Ray, Esq. 

 i,j. Sterna, Nepal. From Mr. Lefevre's Collection. 



7. HYPOTRIORCHIS COLUMBARIUS. The Pigeon Hawk. 



Hypotriorchis columbarius G. R. Gray, Gen. of B. i. p. 



Falco columbarius Linn. S. N. i. p. 128. 



Falco temerarius Audub. B. of Amer. pi. 92. 



Falco aesalon Sw. and Rich. Faun. Bor. Amer. ii. p. 37. 



Tinnunculus columbarius Vieill. Ois. de V Amer. Sept. t. 11. 



Accipiter carolinensis Briss. Orn. i. p. 378. 



Nisus columbarius Cuv. Reg. An. (1817) i. p. 321. 



Astur columbarius Boie, Isis, (1826) p. 976. 



Falco intermix tus Bosc, Daud. Tr. d Orn. ii. p. 141. 



D 4 



