1872.) 235) , [Trippe. 
56. Dendroeca canadensis. Seen a few times in spring, in 
Mahaska County only. 
57. Dendrcoeca coronata. Common; spring and fall. 
58. Dendrosca Blackburnize. Seen a few times in spring, in 
Mahaska County only. 
59. Dendroeca pennsylvanica. Abundant in Mahaska County, 
where many breed. Iwas not able to find its nest, thovgh I frequently 
saw them collecting materials for it. Observed in Decatur County 
only in spring. 
60. Dendrceca cerula. Common; breeds. 
61. Dendreeca striata. Common, spring and fall, in Mahaska 
County; not seen in Decatur. 
62. Dendreeca zstiva. Common; breeds. 
63. Dendroeca maculosa. Rather common in spring in Ma- 
haska County; not seen in Decatur. 
64. Myiodioctes mitratus. One taken in May in Mahaska 
- County. ; 
65. Setophaga ruticilla. Abundant in Mahaska; less so in 
Decatur; does not breed. 
66. Pyranga rubra. Abundant; breeds. 
67. Hirundo horreorum. Not seen in Mahaska County. In 
Decatur County I observed them in a single locality. The farmer, in 
whose barn they had taken up their quarters, told me that a single 
pair had appeared five or six years before, and raised a brood, with 
which they returned the next summer. The little colony had grown 
from that time, till there were thirty or forty, and have now begun 
to frequent other barns in the neighborhood. They are quite as 
tame and familiar as the same bird in the East. 
68. Hirundo lunifrons. Very abundant; by far the common- 
est species of swallow. Breeds in some localities in large numbers. 
69. Hirundo bicolor. Common; spring and fall. 
70. Cotyle riparia. Common; breeds. 
71. Progne purpurea. Common; breeds. 
72. Ampelis cedrorum. Common; breeds. 
73. Collyrio borealis. Very common in Mahaska County, in 
fall and winter; less so in Decatur County; does not breed. 
74. Collyrio ludovicianus. Common; breeds. Arrives in 
February and leaves in. September. The hedges of osage orange 
are its favorite resort and nesting place. 
