380 University of California Publications in Zoology. [Vol. 7 



took short rests, turning her back to the young bird for a few 

 moments. Three or four feedings to the visit were administered. 

 Bare horizontal branches of the limber pine were selected as 

 the scene of the process. The pumping motion of the adult 

 during the regurgitation did not seem to be as vigorous as that 

 of the linnet. The throats of the parent and juvenal were found 

 to be full of hulled pine-nuts. Once I observed a young one 

 persistently pursuing a parent, apparently attempting to coerce 

 the latter into feeding it. 



Dolichonyx oryzivorus (Linnaeus) 



Bobolink 



A single individual in full song observed June 3 at Quinn 

 River Crossing. The bobolink is said in the American Orni- 

 thologists' Union Check-list (1910, p. 231) to breed in north- 

 eastern Nevada. The single individual secured by us (no. 8834) 

 had the enlarged testes significant of breeding activity. 



Molothrus ater artemisiae Grinnell 



Nevada Cowbird 



Distribution. — Three individuals were seen on the out-build- 

 ings of the Sod House Ranch. The yards of the Quinn River 

 Ranch and the willows of Big Creek Ranch were the only other 

 localities at which the cowbird was observed (see Grinnell, 1909, 

 p. 275). 



Habits. — Cowbirds were frequently seen flying rapidly up 

 or down the course of Wheeler Creek, near the Quinn River 

 Ranch. Solitary individuals were sometimes observed flying over 

 this course, but usually the birds were in two 's and three 's. Fre- 

 quently they gave voice to their peculiar shrill "screep," uttered 

 with an ascending inflection; another of their call-notes may be 

 described as a "cluck, cluck" made in the throat and executed 

 simultaneously with an opening of the mandibles. From their 

 actions during the last of May it seemed evident that mating 

 was taking place. 



At times the birds were extremely tame. One morning, while 

 I was walking from the Quinn River Ranch towards camp, two 



