AVES FALCONID^. 



589 



Strigiceps, Bp. Saggio Distr. Met Anim. Vertcbr. p. 37 



(1831) Ccyaneus. 



Glaucopteryx, Kaup, Class. Saug. u. VOg. p. 113 (1844). C. pygargus. 



FIG. 294. 



Circus Mstmitis. Detail of foot From bird just killed. Natural size. 



Spizacircus, Kaup, Mus. Senckcnb. iii. p. 258 (1845) buffo**- 



SpilocircKS, Kaup, Isis, 1847, p. 89 C assimilis. 



Pterocircus, Kaup, Arch. f. Naturg. xvi. p 32 (1850) . . C. Pygargus. 



