170 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
This is the characteristic Swallow of the Cape Region, if not the only repre- 
sentative of the Hirundinidae, excepting the Western Martin, which breeds 
there regularly and plentifully. About La Paz and other places on or near 
the coast it perhaps occurs only in winter, as Mr. Belding indicates, but Mr. 
Frazar found it common on the Sierra de la Laguna in May and early June, 
and at Triunfo and San José del Rancho in late June and July. On the 
summit of La Laguna it was nesting late in May, and one was seen flying over 
the highest peak of this mountain on December 2, while, “at the same time, 
the sunlight glistened on the backs of others skimming about a cafion six or 
eight hundred feet below.” None were observed at San José del Cabo in early 
autumn among the hordes of migrating Barn and Cliff Swallows, but a flock 
was noted at Santiago on November 23. 
It is not probable that brachyptera ranges far to the northward of the Cape 
Region, but it is likely to have been the Violet-green Swallow which Mr. 
Bryant found “nesting in the holes made by the Gila Woodpecker in giant 
cacti,” near Comondu. 
Riparia riparia (Lryv.). 
BaNnkK SWALLOW. 
Clivicola riparia Bryant, Zoe, II. 1891, 195 (San José del Cabo). 
Mr. Bryant seems to be the only observer who has met with the Bank 
Swallow in the Cape Region or, indeed, in any part of Lower California. He 
states that at evening, for a week or two during the early part of September, 
1890, he “witnessed a remarkable flight of swallows, as they followed the 
course of the river” at San José del Cabo. “The birds were principally 
bank swallows (Clivicola riparia), with some rough-winged swallows (Stelgi- 
dopteryx serripennis) among them, and occasionally the large western purple 
martins (Progne subis hesperia) were associated with the thousands of swallows ; 
about sundown the air seemed filled with swallows where during the day 
they were not abundant.’’ 
The occurrence of this species in Lower California is not surprising, for its 
general range along or near the Pacific coast extends from Alaska to Costa 
Rica. 
Stelgidopteryx serripennis (Avup.). 
ROUGH-WINGED SWALLOW. 
Stelgidopteryx serripennis Bryant, Zoe, II. 1891, 195 (San José del Cabo). 
The Rough-winged Swallow is represented in Mr. Frazar’s collection by 
three specimens, all young males killed at San José del Cabo late in August, — 
two on the 28d, and the third on the 25th. In his journal, under date of 
