96 University of California Publications in Zoology. [Vol. 7 



Iridoprocne bicolor (Vieillot). Tree Swallow. 



First noted at San Alberto Bay, Prince of Wales Island, on 

 May 24, when several migrating swallows, apparently of this 

 species, were seen. During the next few days numerous small 

 flocks were observed, usually flying so high overhead that they 

 wotjld not have been noticed were it not for their continual 

 twittering. At Boca de Quadra there were a few pairs, but the 

 species was not common. On the Chickamin River they were 

 noted daily, and several were seen entering holes in dead trees. 

 At Portage Cove, Revillagigedo Island, there were also a few 

 pairs. Only one or two single birds were seen at Bradfield Canal, 

 but at Zarembo Island flocks of juvenals were observed hovering 

 about over the mud flats, but a few inches from the ground. On 

 Mitkof Island a single bird was seen flying south on August 12. 

 At Thomas Bay, August 13 to 23, the species was abundant over 

 the grassy meadows, in company with the barn swallows. This 

 is the last point at which it was noted. 



Five specimens were collected : two adult males, Chickamin 

 River (nos. 9368, 9369), adult male. Portage Cove, Revillagigedo 

 Island (no. 9370), juvenal male, Zarembo Island (no. 9371), and 

 Juvenal male, Thomas Bay (no. 9372). There are no apparent 

 differences between these and California specimens. 



Tachycineta thalassina lepida Mearns. 

 Northern Violet-green Swallow. 

 On the Chickamin River," June 17 to 28, I several times 

 saw violet-green swallows, the lateral white patches at the 

 base of the tail serving to distinguish them from the tree swal- 

 lows with which they were associated. Hasselborg saw some 

 " white- rumped" swallows twenty-five miles up the river. At 

 Thomas Bay several were seen in the large flocks of barn and 

 tree swallows, and a juvenal male secured on August 22 (no. 

 9379). 



Riparia riparia (Linnaeus). Bank Swallow. 



At Thomas Bay, August 15, a single bank swallow was seen 

 repeatedly. This was the only occasion on which the species was 

 observed, but the peculiar flight and coloration both served to 



