IS83-] Allen and Brewster on Colorado Birds. 



195 



paler than Atlantic Coast birds. On the whole all of these specimens 

 seem to me to be nearer leucolcBma than alpesU-is. If the breeding range 

 of /e?<rco/«;«« could be extended, without too much violence, to embrace 

 the whole of the United States east of the Rockj Mountains, (and per- 

 haps of the Sierras as well), and that of alfestris 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. Tyrannus carolinensis. King Bird. — Arrived May 

 10. Not uncommon in suitable localities. 



86. Tyrannus verticalis. Arkansas Flycatcher. — Com- 

 mon. Abundant for several days on its first arrival, May 8. 



'^']. Tyrannus 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 

 Fewee. — 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 difiicilis. Western Yel- 

 LOW-BEixiED 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 



