546 (!LASS XVI. 



et A. H. Veester de Wulverhorbt, Leiden et Dusseldorf, 1844 — 1S53, 

 Avec 1 7 pi. color., par Sondeeland et Wolf, folio. 



Sub-gen. JEsalon Kaup, HypotriorcJiis Boie. (Tarsi longer. Species small.) 



Sp. Falco suhluteo L., Buff. PL enl. 432, Naum, Taf. 26, Sosem. Vog. 

 Eur. Taf. 10, fig. i ; the hohhy, der Lerchenfallce, &c. 



Tinnunculus Vieill., Cerclmeis Boie. Tarsi somewhat long, 

 covered anteriorly witli a double row of scutes. (Toes shorter than 

 in the preceding.) 



Sp. Falco tinnunculus L., Buff, PI. enl. 401, 411, Naum, Taf. 30, the 

 IcestrU, la cresserelle; — Falco cencJiris Naum. Taf. 29, etc.; species which 

 are of a red-brown colour above; the tail-feathers increasing in length 

 from without inwards, with darker transverse bands. Very similar is 

 Falco punctatus Cuv., Temm. PL col. 45, from Madagascar. 



leracidea Gould {Hieracidea). 

 Sp. Falco herigora ViG. and Horsf. 



Hierax Vigoes, Upper mandible bidentate. Wings with second 

 and third quills subequal, longest of all. Tarsi scutellate anteriorly. 

 Toe long, strong. 



Sp. Falco ccerulescens L., Falco mayalensis Stuickl., Edwards ^trcZs, Tab. 108, 

 Vieill. Gal., PI. 18, Tbmm, PL col. 97; Java, and a couple of species 

 from Asia; the smallest diurnal birds of prey. 



Harpagus ViGOES. {Bidens Spix, Diodon Less., Diplodon 

 NiTZSCH.) Bill short, curved, thick, high; upper mandible biden- 

 tate. Wings somewhat short, with first quill short, second, third 

 and fourth gradually longer, fifth longest of all. Tail rounded, 

 elongate. T^u-si scutellate anteriorly. 



Sp. Harpagus bidentatus, Falco hidentatus Lath., Temm. PL col. 28, 288 ; — 

 Harpagus diodon, Falco diodon Temm. PL col. 198; both from Brasil. 



Circus Lacep., Bechst. Bill shorter than head, curved. Upper 

 mandible furnished with a tooth obtuse, obsolete. Cere covered by 

 setaceous, curved plumes. Dense feathers surrounding the lower 

 part of the face with a disc. Wings long, with third and fourth 

 quills longest of all. Tail long. Tarsi elongate, covered anteriorly 

 with transverse scutella. 



Sp. Circus rufus, Falco cervginosus L., Buff. PL enl. 460, 424, Naum. Taf. 

 37, 38, fig. I, Susem. Viig. Eur. Tab. 36; the marsh-harrier, moor-huzzard, 

 la Jmrpaye, le busard de inarais, die Weihe, Rohr-oder Sumpf-vmlie ; 

 Europe, North Africa, some parts of Asia, &c. These species hunt on the 



