BIRDS. 295 



birds were in company with bank and tree swallows. On August 

 10, another migration took place, but these birds did not stop to feed 

 on the way, flying on down the north beach in loose straggling flocks, 

 accompanied by a few flocks of chimney swifts. At Rush Lake this 

 bird was a common breeder, nesting in the farm buildings in the clay 

 country, and was seen daily during August. They bred in numbers 

 in the fish house on Stony Island, and many nests were found, each 

 containing eggs and young, during our stay there. 



88. Iridoprocne bicolor. Tree swallow. — Michigan: Common 

 summer resident, breeding throughout the state. 



Uncommon as a resident on Stony Island and Sand Point but 

 common as a migrant in the latter place. Not observed elsewhere. 

 The species was first seen on Stony Island, July 12, in compan\- with 

 barn swallows, and a single nest containing young birds was found 

 two da3's later. On Sand Point, it was first seen on July 15, and on 

 the following day about fifty were seen near Turtle Bay. These 

 acted like visitors, and were not seen again. On August 4, at the 

 end of Sand Point, we saw several small flocks migrating in company 

 with barn and bank swallows, and again on August 10, a few were 

 seen under the same conditions. The bulk of the migrants were 

 seen after August 13. 



89. Riparia riparia. Bank swallow. — Michigan: Abundant 

 summer resident, breeding all over the state. 



Xot common in the sand region during the breeding season; more 

 abundant after August 18. Observed on Sand Point, at Rush Lake 

 and on Stony Island. Only two colonies were found. On Sand 

 Point a small colons' (six pairs) nested in the steep sand dune west 

 of the fish house, where the waves had washed away the beach and 

 left a vertical face exposed. On June 18 we found the birds about 

 this spot and the next day one of the nests was dug out. It was 

 about 20 inches from the entrance and about ten inches below the 

 surface. The nest was made of grass and grass roots, and beautifully 

 lined with white gull feathers arranged so that they stood on end, 

 thus forming a cup nearly closed at the top. It contained five 

 eggs slightly incubated. This colony had left before the migration 

 of this species on August 4 and 10, but a few birds were seen on the 

 Point as late as August 24. The other colony was found on August 

 3 in a sand bank between Oak and Little Oak Points, and the young 

 were nearly full grown. The few birds seen on Stony Island were in 

 flocks of barn swallows. 



90. Stelgidopteryx serripennis. Rough-winged swallow. — Michi- 

 gan: Common summer resident, breeding throughout the state 

 with the exception of Isle Royale. 



