HUMMINGBIRDS 
233 
5. Exposed culraen not more than half as long 1 as tail; with white 
stripe back of eye. Basilinna, p. 243. 
5 . Exposed culmen more than half as long as tail; without white 
stripe back of eye . .. Amizilis, p. 243. 
3'. Nostrils nearly or wholly feathered. 
4. Wing more than 2.40. 
5. Tail chiefly black — gorget of male intense blue. 
Cceligena, p. 234. 
5'. Tail wholly (male) or partly (female) greenish bronze, gorget 
of male emerald green. Eugenes, p. 233. 
4'. Wing less than 2.25. 
5. Middle tail feathers broader near end than toward 
base — spatulate. Stellula, p. 241. 
• Fig. 300. 
5'. Middle tail feathers narrower near end than toward base. 
6 . Tail partly rufous. Selasphorus, p. 238. 
6 '. Tail without rufous. 
7. Adult males with top of head like gorget; 
females with outer tail feathers broadly 
linear. Calypte, p. 236. 
Fig. 301. 
7'. Adult males with top of head like back ; 
females with outer tail feathers concave on 
inner side .... Trochilus, p. 234. 
GENUS EUGENES. Fig. 302 . 
426. Eugenes fulgens (Swains.). Rivou Hummingbird. 
Bill flattened and slightly widened at base ; tail slightly forked in male, 
double rounded in female ; tarsus feathered. 
Adult male : top of head metallic purplish, gorget 
brilliant emerald green; rest of upper parts bronzy 
green ; under parts blackish green or dull bronzy, 
breast black in some lights. Adult female: top of 
head dull brownish, small white spot behind eye ; 
rest of upper parts bronzy green ; lower parts 
brownish gray, sides washed with green ; tail with 
outer feathers very broadly tipped with pale gray 
or whitish. Young : similar to adult female, but 
feathers of upper parts with pale buffy edgings. 
Male : length 4.50-5.00, wing 2.90-3.10, tail 1.90- 
2.00, bill 1.00-1.20. Female: wing 2.60-2.75, tail 
1.70-1.90, bill 1.00-1.15. 
Distribution. — Mountains of southeastern Ari¬ 
zona and mountains bordering tablelands of Mex¬ 
ico to Nicaragua. 
Nest. — Usually in maples, sycamores, or firs, 
35 to 50 feet from the ground, made of silky plant 
fibers and grass tops, coated with lichen and lined with sycamore down 
and feathers. 
Food. — Largely insects from flowers such as honeysuckle and agave. 
From Ridgway, Smithsonian. 
Fig. 303. 
