APPENDIX. 



One hundred and twenty genera have been recognized in this work, nearly all of which could, 

 probably, readily be identified by any one toleraljly conversant with this group of birds. Many of 

 them are, however, very closely allied to others, and in order to facilitate the determination as much 

 as possible of any particular genus, the following 'Key' has been prepared, which it is hoped, in con- 

 nection with the drawings to be found at the head of every genus illustrating their salient characters, 

 may prove useful in rendering this, perhaps at times, greatly needed service. 



KEY TO THE GENERA. 



A. Bill decurved-to the extent of one-third of a circle. 



B. Bill twice as long as head, tip hooked, cutting edges serrated. 



a. No metallic coloring. Tail long, rounded. 



b. Coloring partly metallic. Tail short, broad. 



C. Bill long, rather stout, decurved, high at base. Tail rounded, 



feather-s pointed in young. Sexes alike. 



D. Bill straight, short, flat and fleshy at base. First primary pointed. 



Se.xes alike. No brilliant hues. 



a. Tail even, external rectrices pointed. 



b. Tail forked. 



E. Median pair of rectrices elongated considerably beyond the rest, 



sometimes pointed, generally attenuated. Bill decurved or 

 straight, nearly as long as body. 



F. Shafts of primaries broad and flattened. 



a. Tail very long, deeply forked. 



b. Tail long, cuneate, central pair of rectrices lengthened be- 



yond the rest. 



c. Tail moderately long, rounded, feathers broad. 



G. Shafts of primaries thickened at base. Bill short, stout. Tail 



square, broad. 

 H. Bill straight, rather stout, as long, or slightly longer than the 



head. Tail rounded, long, ample, the rectrices broad. Bril- 

 liant metallic hues restricted to the throat. 

 I. Bill short, slender, straight. Tail long, forked, feathers broad. 



Metallic hues equally brilliant upon throat and breast. Se.ves 



unlike. 

 J. Bill straight, rather stout, about as long as the head. Tail 



moderately long, forked. Plumage generally metallic. Se.xes 



very dissimilar. 



32 March, 1870. 



1. EUTOXERES, p. 2. 



2. Rhamphodon, 4. 



3. Androdon, 5. 



4. Glaucis, 5. 



5. r)l)LEROMYA, 8. 



G. Ph^oi'tiuv, ".). 



t. Ph^tir'rnis, 10. 



8. Eltetomena, 21. 



',». SrnENorROCTUs, 22. 

 1(1. Ca-MPYlopterus, 23. 



11. Aphantgcuroa, 28. 



12. c.'eligena, 29. 



13. LAMPROL.a;MA, 32. 



14. Oreopyra, 33. 



( '249 ) 



