ceeding it a series of diagnoses explaining the reasons which justify 

 such a classification :* 



* Fomyad anordning av Dagrovfoglarna (Di&poDitio nova Acci^itrum Hemeroharpagorum). 

 Kongl. Vetenukaps Akfedemi'ens Fordhaudlingar 1874. No. 2. Stockholm, 

 6.^* "Suborder." 



Ofersigt af 



A. — Scapular process of the coracoid produced forward so as to meet 

 the clavicle.f Nasal bones almost completely ossified, the nostril 

 being a small, usually circular, opening, with a conspicuous, usually 

 centraljbony tubercle.f Inferior surface of the supramaxillary with 

 a prominent median angular ridge. Superciliary process of the 

 lachrymal consisting of a single piece.§ Subfamily Falconinw. 



B.— Scapular process of the coracoid not produced forward, but separated 

 from the clavicle bj'- a wide interval. || Nasal bones very incom- 

 pletely ossified, the nostrils large, without bony tubercle, and 

 frequently with an incomplete septum. Inferior surface of the 

 supramaxillary without median ridge.^ Superciliary process of 

 the lachrymal usually consisting of two pieces, joined by a cartil- 

 aginous hinge.** Subfamily Buteoninw. 



It IS proper to explain here that the key to the leading character was furnished by Pro- 

 fessor Huxley in the paper before leferred to (p. 464), in the following words : ' ' The scap- 

 ular process of the coracoid sometimes is * [ * e.g., in the Falcons proper, and m Pokborusl 

 and sometimes IB not produced to the clavicle"— having reference to the family Falconida. 

 1 oUowing up this clew by examining the coracoid apparatus of every genus available, I was 

 surprised to find It to be a character which separated trenchantly not only the "Falcons 

 proper (=Falcones) and Polyborus, but also all the genera related to the latter, besides Mi- 

 crastur and Herpetotheres, from all other Falconida. 



t See Plate XI, Figs. 1-4. 



t Except in Micrastur. (See Plate XII, Fig. 4 ) 



5 See Plate XIII, Figs. 1-4. 



II See Plate XI, Figs. 5-11. 



«ll!i a!!'!^,f^^''"^■'''■"v*i^ ''"^'"'" "/ *" ^'ipramaxillary is so deeply sinuated as to 

 ^llow the middle portion of the under surface to be seen from the side ; but this has no anal- 

 ogy to the raised median ridge of the falconine forms 



«„r J™w ''^&''°"'1"'%"'? •^^"»f^'»»f. (P««<^'««) and Pernes (Elanoides, Cymindis, Seserhi- 

 "n r£ 6 and 7f Plat'xm.'" ""'^ ^^^^mhle, that of the ptlybori, 'as shown 



