COCCYZUS. 273 
a’, Wing less than 6.00, tail less than 11.00; throat and chest plain buff or buffy 
whitish; above metallic bronzy brown, becoming blue-black anteriorly, 
each feather broadly edged with whitish; beneath buffy whitish or buff, 
including throat, fore-neck, and chest, the sides of the latter streaked with 
black; two middle tail-feathers bronzy brown, the rest metallic greenish, 
broadly tipped with white; wing about 5.50, tail about 10.30. Hab. Guate- 
mala and southern Mexico, north to Yucatan, Vera Cruz, and Mazatlan. 
G. affinis Harti. Mexican Road-runner. 
Gunus COCCYZUS Visitor. (Page 272, pl. LXXX., fig. 1.) 
Species. 
Common CHaractErs.—Above plain brownish gray or grayish brown, with 
more or less of a faint bronzy lustre, the color usually becoming more grayish on 
head, on side of which (over ear-coverts) is a darker stripe; lower parts plain 
whitish, buffy, or ochraceous; tail-feathers (except middle pair) more or less dis- 
tinctly tipped with whitish. Vest a slight flat structure of sticks, etc., usually on 
small trees or lower branches of larger trees. 
a. Basal half, or more, of lower mandible yellow; adult with tail-feathers (except 
middle pair) black, broadly and abruptly tipped with white; young with tail- 
feathers grayish dusky, broadly, but not sharply, tipped with dull white. 
b'. Inner webs of quills chiefly rufous, the outer webs more or less tinged with 
same toward base ; lower parts white tinged with pale ashy on fore-neck, 
chest, and thighs. 
c. Smaller, with proportionally smaller and weaker bill; length 11.00- 
12.70, wing 5.40-5.80 (5.61), tail 6.00-6.15 (6.07), exposed culmen 
.97-1.01 (.99), depth of bill at base 32-34 (.33). Eggs 2-5, 1.19 x 
.90, dull pale glaucous-green or glaucous-white. Hab. Eastern North 
America, north to New Brunswick, Canada, etc., west to the Great 
Plains, south, in winter, to West Indies, eastern Mexico, and Costa 
Ri€avecvcesaverss 387. C. americanus (LINN.). Yellow-billed Cuckoo. 
ce. Larger, with proportionally larger and stouter bill; length 12.30-13.50, 
wing 5.50-6.00 (5.84), tail 6.10-6.90 (6.59), culmen 1.02-1.08 (1.05), 
depth of bill through base .87-.40 (.39). Hab. Western United States, 
north to Oregon, east to western Texas and Colorado, south over 
table-lands of Mexico; Lower California. 
387a. C. americanus occidentalis Rinaw. Californian Cuckoo.” 
LU. Quills without rufous on either web; lower parts buffy or ochraceous, paler 
anteriorly. 
c. Larger, with lower parts much more deeply colored; lower parts deep 
1 Geococcyx affinis HaRTLAUB, Rev. Zool. 1844, 215. 
3 New subspecies. 
35 
