330 
ON THE classification OF BIRDS. 
nostrils. Tip of the upper mandible with a distinct 
notch; the margins entire. Wings long; the three first 
quills nearly equal. Lateral toes unequal. South 
America only. 
N. cyanocephala. Zool. III. i. pi. 117. 
Dicbum, Cuvier, (^fig. 288. A) Bill short, remarkably 
broad at the base, and suddenly compressed beyond ; 
the tips entire ; the margins minutely denticulated. 
Nostrils triangular. Wings, feet, and tail as in Nec- 
tarinea. Indian and Australian Islands. 
D. sanguinea. Lewin, N. H. Birds, pi. 7. 
, Family TROCHILIDiE.* Humming Birdi. 
Wings excessively long, falcated. Feet very small. 
Lampornis, Sw. Bill straight, or very slightly bent ; 
generally pale ; considerably depressed for its whole 
length, but more especially at the base. Wings reach- 
ing to the end of the tail, which is short and even. 
L. mango. Brazil Birds, i. pi. 27, 28. 
Trochilus, Auctorum. Bill very straight, long, cy- 
lindrical, or rather broader than high. Tail gene- 
rally even, but sometimes slightly forked. 
T. longirostris. Auct. 
Cynanthus, Sw. BUI cylindrical, more or less curved. 
Tail forked. , 
C. forficatus. Auct. 
PiHBTHOBNis, Sw. BUI Considerably compressed, ge- 
nerally curved from the base. TaU graduated, or 
cuneated. Colours less briUiant. The rasorial type. 
P. superciliosus. Auct. 
Campylopterus. Sw. Bill curved. Shafts of the quUls 
dilated. Tail graduated. ■|’ 
C. recurvirostris. Zool. 111. i. pi. 105. 
» The typical characters alone are given of what I consider to be the 
primary groups i but as the circular succession of the aubgenera in each is 
a subject which requires more investigation than I have yet been able to 
give it, 1 shall not attempt to impose n.amcs upon the minor groups, which 
cannot as yet be properly demonstrated. 
t The rank of this group is very uncertain. I am inclined to think that 
.the Trochilus recurvirostris is the type of the grallatorial division of this 
ifkraily ; but this is mere conjecture. 
