288 CALIFORNIA ACADEMY OF SCIENCES. 



Anthony has met with it up to 8,000 feet altitude, and says 

 it winters in the low hills near the coast. Poor-wills were 

 heard every evening on the steep hillsides at Comondu, 

 and at various other localities. The only specimen secured, 

 a male, was taken at Pozo Grande, March 19, 1889. I fol- 

 lowed the bird some time before getting a shot, and each 

 time that it was frightened it flew about one hundred yards 

 and alighted on cactus about three feet high. The Mexi- 

 cans call them "tapa-camino'' when they see them in the 

 trail at dusk, but they also call the night-hawks by the same 

 name; at Comondu they were known as "cow-day,'' from 

 the almost perfect resemblance of their note to those words. 

 In Upper California the birds, which I have frequently 

 heard, utter the notes rapidly, and sounding '' poov-ioilV 

 clearly; in Lower California the sounds are given quite 

 slowly, and resemble the words "cow-day'' rather than 

 ' ' poo7'-2vill .' 



160. Chordeiles texensis Lawr. 



Texan Nighthawk. — Messrs. Xantus, Belding and An- 

 thony have each noted this species from the regions which 

 they have visited. I found it at San Juan, on the gulf side, 

 and at San Jorge, on the west coast, and a few other local- 

 ities further north. 



161 . Cypseloides niger (Gmel.) 



Black Swift. — Small flocks migrating northward were 

 seen by Mr. Anthony, during May, at San Quintin, and at 

 San Carlos Landing (sixty miles farther south). 



162. Chsetura vauxii (Towns.) 



Vaux's Swift.— Seen by Mr. Belding in May, 1885, be- 

 tween San Rafael and San Pedro Martir. 



163. Micropus melanoleucus (Baiid). 



White-theoated Swift. — Seen at San Jose del Cabo by 

 Mr. Belding, and at San Ysidro (April), and San Fernando 

 (June) by Mr. Anthony. About the high cliffs forming 

 the eastern side of San Pedro Martir, he found a colony 



