616 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Rhynchodon Nitzsch, Obs. Av. Art. Carot. Com., 1829, 20. (Type, as designated 



by A. O. U. Committee, 1886, Falco peregrinus Tunstall.) 

 Rhyncodon (emendation) Bonaparte, Nouvi Ann. Bologna, viii, 1842, 137. 

 Rhinchodon (emendation) Lesson, ficho du Monde Savant, s6r. 2, vii, 1843, 588. 

 Euhierax Webb and Berthelot, Hist. Nat. Canaries, ii, 1838-44, Orn., 1841, 5. 



(Type, by anteriority, Falco peregrinus Tunstall.) 

 Eufalco AcLOQUE, Faune de France, i, 1900, 113. (Type, as designated by 



Richmond, 1917, Falco communis Gmelin = F. peregrinus Tunstall.) 

 Archifalco Boetticher, Anz. Orn. Ges. Bay., i, 1927, 112. (Type, by original 



designation, Falco peregrinus Tunstall.) 

 Rhynchofalco Ridgwat, Proc. Boston Soc. Nat. Hist., xvi, 1873, 46, footnote. 



(Type, by original designation, Falco femoralis Temminck.) 

 Tinnunculus Vieillot, Ois. Am^r. Sept., i, 1807 (publ. 1808), 39. (Type by 



tautonymy, Falco tinnunculus Linnaeus. )2*' 

 Tinunculus (emendation) Antinori, Cat. Coll. Ucc. Africa, 1864, 15. 

 Cerchneis Boie, Isis, 1826 "976" = 970. (Type, by monotypy, Falco rupicolus 



Daudin.) 

 Cenchris "Boje" Brehm (C. L.), Handb. Steuben . . . Vog., 1832, xviii, 323. 



(Type, by monotypy, Falco tinnunculus Linnaeus.) 

 Aegypius (not of Savigny, 1809) Kaup, Skizz. Entw.-Gesch. Eur. Thierw., 1829, 



29, 190. (Type, by anteriority, Falco tinnunculus Linnaeus.) 

 Tichornis Kaup, Classif. Saugeth. und Vog., 1844, 108. (Type, by monotypy, 



Falco cenchris Cuvier=F. naumanni Fleischer.) 

 Trichornis (emendation) Fitzinger, Sitzb. Akad. Wien, xxi, 1856, 289. 

 Paecilornis (emendation) Bonaparte, Consp. Gen. Av., i, 1850, 27. 

 Aesalon Kaup, Skizz. Entw.-Gesch. Eur. Thierwelt, 1829, 40, 190. (Type by 



monotypy and tautonymy, Falco aesalon Tunstall = F. regulus Pallas.) 

 AEsalon (emendation) Kaup, in Jardine's Contr. Orn., 1850, 54. 

 Lithofalco Reider and Hahn, Fauna Boica, ii. Heft i, 1835, text to pi. 14, fig. b. 



(Type, by monotypy, Falco aesalon Tunstall.) 

 Lithofalco Bonaparte, Icon. Faun. Ital. i, 1840, text to pi. 24. (New name for 



Aesalon Kaup, 1822.) 

 Neofalco Ridgway, Man. North Amer. Birds, 1887, 248. (Type, by original 



designation, Falco albigularis Daudin.) 



Very large to very small falcons (largest species with wing about 

 420 mm., the smallest with wing as short as 166 mm.), with one or two 

 outermost primaries emarginated much beyond the middle portion of 

 the inner web ; maxillary tomium with a prominent toothlike subter- 

 minal process and with a corresponding notch on the mandibular 

 tomium; tarsus less than twice as long as middle toe without claw, 

 the latter exceeding the longest lateral toe by less than half the length 

 (curve) of the culmen; planta tarsa covered with small scales, or at 



28 There has been considerable discussion as to the type of this genus, and the 

 above designation is different from that given in the 1910 edition of the A. O. U. 

 Check List. However, Vieillot called this group "Cresserelles," and dealing 

 with the birds of North America, enumerated "La Cresserelle des Pigeons, Tin- 

 nunculus columbarius," and "La Cresserelle CEsalon, Tinnunculus sparverius." 

 Under the latter he refers to "la Cresserelle d'Europe, Falco tinnunculus, Linn." as 

 being related to it. I think this mention of Falco tinnunculus Linn, is suflBcient 

 to fix the type by tautonymy. (Richmond, MS.) 



