182 Vniversity of Califonila Publications in Zoology [Vol.12 



to the river. Four were shot, nos. 13327-13330, all proving to be males 

 in winter plumage. In these the lower parts are irregularly blotched 

 with black. Two more were seen the same day in a willow on the 

 California side a few miles below, in Blankinship Valley. A solitary 

 female (no. 13331) was secured ten miles below Cibola, on the Arizona 

 side, April 8. This bird was perched upon the wall of an adobe ruin 

 on a spur of the mesa abutting upon the river. 



Piranga ludoviciana (Wilson) 

 "Western Tanager 



Common a.s a migrant. First seen, a male, on the Arizona side 

 five miles above Laguna, April 25 ; another male noted there the next 

 day. Several were seen at Potholes, April 29, and four miles south 

 of Potholes, May 1. 



Five miles northeast of Yuma, on the California side, May 4, a 

 very conspicuous arrested migration was in evidence among many 

 species of transient birds. A heavy westerly wind blew all day, and 

 the thick willow and cottonwool! growth dose to the river furnished 

 both shelter and forage. Western tanagers were present in large num- 

 bers. I counted twenty in sight at one moment, flying serially along 

 the edge of the woods. In the vicinity of Pilot Knob, up to May 15, 

 this species was numerous, both on the bottom lands, and out on the 

 desert. On the 7th and 13th, many western tanagers, singly and in 

 pairs, w^ere seen flying to the northwest low over the desert mesa north 

 of Pilot Knob, frequently alighting for a moment in creasote bushes 

 or ocotillos before resuming their transit. Eight specimens of this 

 tanager were obtained, nos. 13415-13422. 



Piranga rubra cooperi Ridgway 



Cooper Tanager 



Fir.st seen April 20 on the California side of the river eight miles 

 east of Picacho: a single full-plumaged male which was secured. It 

 attracted attention through its typical tanager call note, "pritit"; but 

 the bird was difficult to discern in spite of its brilliant red attire, amid 

 the vivid green of the new foliage of the willow thicket in which it 

 ensconced itself. 



