42 BIRDS. 



6. Bill tenuirostral, very slender, much longer than head ; secon- 

 daries very short, 6 in number: plumage compact. 



Tbochilid.<e, 39. 



Vb. Bill fissirostral, much shorter than head ; secondaries more 



than 6. 



c. Rictal bristles present; middle claw pectinate; plumage 



lax, variegated ; length 8 or more. Capeimulgid^, 37. 



cc. No rictal bristles ; plumage compact, of blended colors ; 



tail feathers (in oui's) spinous ; length 6 or less. 



CypsELiD.*;, 38. 



I. FAMILIES OF PSITTACI. 



1. Cere feathered, concealing the nostrils; plumage coarse and 

 dry, chiefly green Akid^, 43. 



J. FAMILIES OF RAPTORES. 



I. Hind toe on a level with the rest, more than half length of 



outer toe, and with a lai'ge claw; claws strong, sharp, much 



curved; nostrils imperforate; head mostly feathered; bill 



sti'ongly hooked. 



a. Eyes directed fonvards in consequence of the great lateral 



expansion of the cranium, and smTounded by a disk of 



radiating bristly feathers. . . . Strigid/B, 44. 



aa. Eyes lateral ; no complete facial disk. . FalconiD/B, 45. 



II. Hind toe elevated, not more than half length of outer toe; 



claws weak and little curved; nostrils perforate ; head mostly 

 naked ; bill little hooked. . . . CATHABTiDiK, 46. 



K. FAMILIES OF COLUMB^. 



I. Head small, feathered (except sometimes a circumorbital ring); 

 feathers loosely inserted. . . . Columbid^, 47. 



L. FAMILIES OF GALLING. 



I. Head unfeathered, with wattles and caruncles ; a tuft of bristly 



feathers on breast; tarsus spui-red in 3;' plumage iridescent; 

 large, 36 or more Mbleagbid/b, 48. 



II. Head feathered ; plumage not iridescent ; size much smaller. 



