John Hogg, Esq., on the Classification of Birds. 53 



an " aberrant form. Hence arises the especial difficulty of 

 classifying birds with such coiTectness and minute accuracy, 

 as every careful ornithologist would desire to do. So then, 

 in my present arrangement, I earnestly hope that the zoolo- 

 gist, after making due allowance for certain exceptions or 

 aberrant forms, will find the general divisions and leading 

 characters of the tribes, sub tribes, and other sections, not 

 hastily designed, but uniformly carried out with a sufficient 

 degree of exactness and regularity for all practical purposes, 

 and in strict conformity with Nature. 



The following is a Synopsis of my classification : — 



Class II.— AVES. 



Subclass I.— AVES CONSTRIC- 

 TIPEDES. 



Division I. — Terrestres. 

 Order I. Raptores. 



Tribe I. Planicerirostres. 



Suhtrihe 1. Diurni. 



Family 1. SarcoramphidaB. 



Genus. Neophron. 



Family 2. Vulturidae. 



Genera. Gyys, Vultur.* 



Family 3. Gypaetidae. 



Genus Gypaetus. 



Family 4. Aquilidae. 



Genera. Haliaetus, Aquila, Pan- 



dion, Circdetus. 



Family 5. Falconidae. 



Genera.. Falco, Accipiter, Astur, 



Milvus, Nauclerus, Elanus. 



Family 6. Buteonidse. 



Genera, Buteo, Pernis, Circus, 



Strigiceps. 



Tribe II. Tecticerirostres. 



Suhtrihe 2. Nocturni. 



Family 1. Strigidae. 



Genera. Surnia, Nyctea, Strix, 



Ulula, Symium, Athene. 



Family 2. Bubonidae. 



Genera, Bubo, Otus, Scops. 



Order II. Prehensorea. 

 Tribe. Rotundirostres. 

 Suhtrihe 1. Laeviliiigues. 

 Families 1. Plyctolophidae. 2. 

 Psittacidae. 3. Macrocercidae. 

 4. Pezoporidae. 5. Psittaculidae. 

 Suhtrihe 2. Hirtilingues. 



Family 6. Loriadae. 



Suhtrihe 3. Tubilingues. 



Family 7- Microglossidae. 



Order III. Insessores. 



Tribe I. Curvirostres. 



Suhtrihe 1. Scansores. 



Family. Cuculidae. 



Genera. Cuculus, Oxylophus, Coc- 



cyzus. 



Tribe II. Cuneirostres. 



Family 1. Picidae. 



Genera. Dryotomus, Pious, Jynx. 



Family 2. ApternidaB 



Genus. Aptemus. 

 Family 3. Sittidae. 



Genus Sitta. 



Tribe III. Conirostres. 



Suhtrihe 2. Claniatores. 



Family 1. CoraciadidaB. 



Genus. Coracias. 



Family 2. Corvidae. 



Genera, Garrulus, Pica, Nucifraga, 



Corvus, PyrrhocoraXy Fregilus. 



Suhtrihe 3. Cantatores. 



Family 3. Sturnidae. 



Genera. Stumus, Pastor, Agelaius. 



* The Order and Genera in italics signify the Extra'Britannic Birds, or those 

 which are foreign to the British Islands. 



