:SS 3 .] 
Allen and Brewster on Colorado Birds. 
x 95 
paler than Atlantic Coast birds. On the whole all of these specimens 
seem to me to be nearer leucolcema than alpestris. If the breeding range 
of leucolcema could be extended, without too much violence, to embrace 
the whole of the United States east of the Rocky Mountains (and per- 
haps of the Sierras as well), and that of alpestris proper restricted to 
regions north of our northern boundaries the case would be simplified. 
But the material which I have examined, although suggesting some such 
arrangement, is by no means extensive enough to warrant its serious 
proposal here. 
85. Tyrannns carolinensis. King Bird. — Arrived May 
10. Not uncommon in suitable localities. 
86. Tyrannns verticals. Arkansas Flycatcher. — Com- 
mon. Abundant for several days on its first arrival, May 8. 
87. Tyrannns vociferans. Cassin’s Flycatcher. — A 
few seen with the preceding May 8 to 12. 
88. Sayiornis sayi. Say’s Flycatcher.— Arrived March 
30 ; were frequent in the town and elsewhere till May 8, when 
for a few days they were abundant. Later they were much less 
common, — a pair here and there where they found favorable 
breeding sites, usually the outbuildings of ranches. 
89. Contopus borealis. Olive-sided Flycatcher. — 
First seen May 17, when a pair was shot and others were seen. 
Occasionally observed later. 
90. Contopus virens richardsoni. Western Wood 
Pewee. — Taken May 18 and seen occasionally later. Common 
in summer on the West Monument. 
91. Empidonax minimus. Least Flycatcher. — One 
taken May 4 and another May 9 were the only ones identified. 
92. Empidonax obscurus. Wright’s Flycatcher. — 
First observed April 25. Numerous specimens were taken later, 
it being, at least during the first half of May, the common Em- 
pidonax of the region. 
93. Empidonax hammondi. Hammond’s Flycatcher. 
— -Arrived a little later than the preceding and was rather less 
common. 
94. Empidonax flaviventris difficilis. Western Yel- 
low-bellied Flycatcher. — A single specimen taken May 20. 
95. Antrostomus nuttalli. Nuttall’s Whippoorwill. 
— A single specimen was shot May 3 in Austin’s Bluffs — the 
only one met with in our numerous excursions in April and May, 
although probably not rare during the latter month in suitable 
localities. During the breeding season they were heard every 
