TO YELLOWSTONE NATIONAL PARI. 75 
21. GEOTHLYPIS PHILADELPHIA MACGILLIVRAYT, (Wils.) Allen. 
WESTERN MOURNING WARBLER. 
A female of this species was found dead on the shore of the Yellowstone Lake. 
22, ICTERIA VIRENS, (Linn.) Baird. 
YELLOW-BREASTED CHAT. 
Abundant along the Missouri River. Its familiar notes were heard whenever we passed a 
wooded bottom, and its curious antics often seen. 
23, SETOPHAGA RUTICILDA, (Linn.) Si. 
REDSTART, 
Seen on several occasions in the Missouri River bottom. 
TANAGRID Zi. 
24. PYRANGA LUDOVICIANA, (Wils.) Bon. 
LOvISIANA TANAGER. 
Observed quite frequently in the Yellowstone Park. 
HIRUNDINID&. 
25. UIRUNDO HORREORUM, Barton. 
Barn SWALLow. 
Abundant throughout the region which we traversed. 
26. HIRUNDO THALASSINA, Sw. 
VIOLET-GREEN SWALLOW. 
Very numerous about Fort Ellis, and more or less abundant throughout the Yellowstone Park. 
27. PETROCHELIDON LUNIFRONS, (Say) Sel. 
CLIFF SWALLOW. 
Extremely abundant along the Missouri River, breeding on many of the high bluffs between 
which it flows. They were also common in the mountains, and especially so about Camp Baker. 
Early one morning late in July, while traveling along the road near the Judith Mountains, I 
was surprised to see great numbers of these birds feeding on the ground. A little investigation 
showed me that they were picking up insects that had been chilled by the severe frost of the 
previous night, aud were as yet unable to fly. 
28. COTYLE RIPARIA, (Linn.) Boie. 
SAND MARTIN ; BANK SWALLOW. 
Observed iu large numbers on the Missouri River; often breeding in the same bluffs to which 
the preceding species had attached their nests. 
29. PROGNE SUBIS; Baird. 
PURPLE MARTIN. 
Abundaut iu the mountains, where it breeds. 
