the Study of the Drepanididse. 583 



the lower ; if (as in Lo.vops) tlie beak is 

 short and like that of a small Finch, then 

 the lower mandible is more or less dis- 

 torted either to the right or left, the tail is 

 elongated and conspicuously forked, and 

 the birds themselves are of very small size. 

 G (13). Tail more or less short, not long and dis- 

 tinctly forked ; lower mandible not de- 

 flected; beak not short and robust, like 

 that of a small Finch. 



7 (8). Beak straight, long, and strong, about as 



long as the metatarsus. (No well-marked 

 sexual distinctions in plumage of adults. 

 Tongue long, brush-like, typically Dre- 

 paniue.) Viridonia, 



8 (7). Beak curved or straight, if straight then 



much shorter than in 6. 



9 (10). Beak more or less curved, generally distinctly 



so ; nasal setse always present and well 

 developed. Tongue typically Drepanine, 

 long, and brush-like. ( Well-marked sexual 

 distinctions in plumage of adult, the male 

 much brighter in colour.) Chlorodrepanis. 



10 (9). Beak straight or not curved as in 9; dis- 



tinct nasal setse or setiform feathers 

 may be present or entirely wanting. 

 Tongue abnormal, flatfish, slightly cleft 

 at the apex, not of the typical tubular 

 brush-like form. 



11 (12). Nasal setre or modified setiform feathers 



well developed, so as to be able to shield 

 the whole length of the nasal-openings. 

 (Colour of sexes little differentiated.) . . Oreomyza. 



12 (11). Nasal setse or setiform feathers entirely 



absent, or at least very short and little 

 developed, not able to shield the nasal 

 openings. (Sexual coloration of adults 



markedly different.) Paroreomyza *, subgen. nov. : 



type Oreomyza maculata. 



13 (6). Tail elongated, distinctly forked at apex; 



lower mandible more or less deflected ; 

 beak short, but stout, like that of a small 

 Finch. (Tongue typically Drepanine.) . . Loxops. 



* Herein 1 place also the other three species with sexual dimorphism. 



