i6o 
Allen and Brewster on Colorado Birds. 
[July 
3 6. Hirundo erythrogastra horreorum. Barn Swallow. 
— First observed May 2 ; frequently seen later. Not abundant. 
37. Tachycineta thalassina. Violet-green Swallow. — 
First seen May 4. A considerable number observed on the 14th, 
and at frequent intervals later. In July and August large num- 
bers were seen near West Monument Creek, where they out- 
numbered all the other Swallows. 
38. Tachycineta bicolor. White-bellied Swallow. — 
Not seen in spring, but a pair was observed in June, nesting on 
the West Monument. 
39. Petrochelidon lunifrons. Cliff Swallow. — First 
observed about May 18, but doubtless arrived somewhat earlier. 
Small parties frequently seen on the wing later. On the West 
Monument late in summer it ranked next to the Violet-green 
Swallow in numbers. 
40. Stelgidopteryx serripennis. Rough-winged Swal- 
low. — First observed about May 10, and not uncommon later. 
41. Myiadestes townsendi. Townsend’s Solitaire. — 
One shot April 14, and a few others seen on following days. 
They appeared in large numbers on April 29, evidently forced 
down from the mountains by a heavy snowstorm, and were 
everywhere abundant, even frequenting open fields near thickets. 
A few were seen the next day, but none afterward. 
42. Vireo gilvus. Warbling Vireo. — First taken May 
16 ; frequently seen later, but was by no means common. 
43. Vireo solitarius plumb eus. Plumbeus Vireo. — Two 
obtained May 3 ; seen at intervals later, but not common. 
44. Lanius borealis. Northern Shrike. — Seen a few 
times in March. 
45. Lanius ludovicianus excubitoroides. White- 
rumped Shrike. — Not common. First seen April 29, and 
single pairs were met with later. Nest with eggs taken May 23. 
46. Carpodacus cassini. Cassin’s Purple Finch. — A 
few were seen in the vicinity of Cheyenne Creek during April. 
Last observed about April 23. 
47. Loxia curvirostra mexicana. Red Crossbill. — A 
flock of about thirty individuals was seen at Austin’s Bluffs 
April 26. A few were noticed here and elsewhere at both 
earlier and later dates. 
Although evidently not typical mexicana , our specimens approach that 
.form, both in respect to general size (the longest wing among six exam- 
