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 Jose 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 canon six or 

 eight hundred feet below." None were observed at San Josd 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 (Linn.). 

 Bank S'wallow. 



Clivicola riparia Bryant, Zee, 11. 1891, 195 (San Jose 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 Jose 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 (Aud.). 



Rough-winged Swallow. 



Stelgidopteryx serripennis Bryant, Zee, II. 1891, 195 (San Jos<? del Cabo). 



The Rough-winged Swallow is represented in Mr. Frazar's collection by 

 three specimens, all young males killed at San Jose del Cabo late in August, — 

 two on the 23d, and the third on the 25th. Li his journal, under date of 



