AVES. 547 



approach of darkness, and build their nest amongst rushes or brushwood on 

 the ground. (The genus GypogeranuSy see below p. 552, has affinity with 

 Circus.) 



Milvus Bechst., Cuv. Bill short, somewhat straight at tlie 

 base, with tip curved. Upper mandible furnished with a rounded, 

 obsolete tooth. Nostrils oval, oblique. Plumes of head and neck 

 narrow, lanceolate. Wings long, with third and fourth quills 

 longest of all. Tail long, frequently emarginate or forked. Tarsi 

 moderate, above plumed in front, below covered with a row of scutes, 

 naked posteriorly, reticulate. 



Sp. Milvus regalis Briss., Falco Milvus L., Buff, PI, enl. 421, Naum. 

 Taf. 31, fig. I, Cuv. R. Ani., ed. ill., Ois. PI. ir, fig. 3; the kite, le milan, 

 der Milan ; a species dispersed over a great part of Europe; reddish brown, 

 the legs yellow. — Milvus nigei; Falco ater Gm., Buff. PI. enl. 472, &c. 



Elanus Savigny. Tarsi very short, reticulate with scales. Tail 

 very long. (Wings with second quill longest of alL) 



Sp. Milvus melanopterus, Falco melanopterus Daud., &c. 



CuviER placed also in this sub-genus Falco furcatus L., Milvus caroli- 

 nensis Briss., Buff. PI. enl. 72, Wilson Amer. OrnitJi. PL 51, fig. 3, with 

 tail very deeply forked, which species fonns the type of the sub-genus 

 Nauclerus Vigors. Here also belongs a species from Africa, Falco Rio- 

 couri ViEiLL., Temm. PI. col. 85. 



Ictinia Yieill., Gray. 



Sp. Milvus cenchris Vieill., Falco plumheus Gm., Teimm. PI. col. 180; — 

 Falco mississippiensts Wils., Ictinia ophiophaga Vieill., Gal. des Ois. PL 

 17, Wils. Am. Ornith. PL 25, fig. i. 



Pernis Cuv. Bill short, curved, with tip hooked, the margin 

 of upper mandible sinuate, without tooth. Nostrils narrow, oblique. 

 Region in front of eyes at the base of bill beset with short, rigid, 

 imbricate plumes. Wings with second and following quills up to 

 the sixth sinuate internally before the extremity, the foui'tli longest 

 of all. Tail long, subrounded. Tarsi feathered in front above, 

 reticulate below. 



Sp, Pernis apivora Cuv,, Falco apivorus L., Buff. PI. enl. 420, Naum. Taf. 

 35> 36, SuSEM. Vog. Eur. Taf. 35; the honey-huzzard, la bondree, der 

 Wespenhussard : this bird hunts for wasps and bees; the colour presents 

 many individual differences ; it is found in the east and south parts of 

 Europe and in Eastern Asia ; in Germany it is a bird of passage, which 

 arrives late in the spring. It represents the Cuccoo amongst the falcons, 

 — Pernis cristata Cuv., Regne Ani. PL 3, fig. 4, Falco ptilorhynchus Temm, 



35—2 



