Bird LiFt, of North Dakota , 69 



lains. RiDGWAY, 1904, p. 53; breeding at Pembina River and the Turtle Mountains. 

 JuDD, 1917, p. 25; common summer resident in the Turtle Mountains, nesting in 

 hollow trees. 



This species was common at Devils Lake, May 2, 192 1, and later hun- 

 dreds nested in boxes about the Cliautauqua grounds and in the hollows of 

 trees about the lake, 



I did not see martins at Aledora or Williston, but saw a few at Bottineau, 

 July 10, 1921. Mr. Williams has a specimen taken June 10, 1905, at Grafton, 

 where he says they are common. 



These birds are most beneficial in their food habits, living entirely on 

 insect life. 



252. Petrochelidon lunifrons lunifrons (Say). Clifif Swallow. 



CouES, 1878, p. 571 ; the most abundant, generally distributed, and characteristic 

 species of the family in the region. Specimens were taken at Pembina from June 

 13 to July 7, 1873. Hoffman, 1882, p. 398 ; not common, several nests found in the 

 clififs seven miles below the villa,ge. Fort Berthold. McLean County. CouEs. 1897, 

 p. 66 ; on June 29 Audubon found a flock of cliff swallows endeavoring to build nests 

 beneath the ledges of a clay bank: p. 176; August 2, Bell found on a cliff numbers 

 of cliff swallows' nests, with the old ones feedmg the young. This is very uncom- 

 mon at this late season. Judd, 1917, p. 25; common summer resident; first seen May 24. 



The species was first seen at Devils Lake, May 20, 1921, but a great 

 migration occurred May 29, when hundreds of swallows, including many 

 of this species were noted near the Station. 



253. Hirundo erythrogastra Boddaert. Barn Swallow. 



CouEs, 1878, p. 570; commonly observed during July and August at various points, 

 but only one specimen was taken in North Dakota, at the Mouse River, August 30, 

 '^^72- JUDD, 1917, p. 25 ; common summer resident, first seen second week in May 

 and as late as October 20. 



This species was first seen at Devils Lake, May 14, 1921, but on May 29, 

 in a great migration of swallows, there were hundreds of this species, and it 

 was later found to be common throughout the staite. 



254. Iridoprocne blcolor (Vieillot). Tree Swallow. 



CoUES, 1878, p. 571 ; only observed at Pembina, where it was breeding in small 

 numbers about the Fort ; a specimen was taken there June 19, 1873. Judd, 1917, p. 

 25; common summer resident of wooded regions, arrives the first week in May. 



This species was at Devils Lake on my arrival, May 2, and bred in some 

 numbers about the lake. I also found it at the Turtle Mountains on June 

 5, 192 1, but it is only locally common throughout the sitate. 



255. Riparia riparia (LinnEeus). Bank Swallow. 



CouES, 1878, p. 572 ; generally distributed along the line west of Pembina and 

 one was taken there June 13, 1873. Hoffman, 1882, p. 398; a few noticed north of 

 the village at the sand-banks where the river formerly ran. Judd, 1917, p. 25; com- 

 mon summer resident of prairies; not noted at the Turtle Mountains. Freeman, 

 1919, p. IS; very common summer resident. 



The bank swallow seems to occur very generally throughout the state. 

 A large colony nested at the Narrows, Devils Lake, in July, 1920, and a 



