92 PACIFIC COAST AVIFAUNA No. 14 



Nests of this bird have been found very frequently and tliere is a large 

 amount of data on the subject. These data go to show that there are normally 

 two broods in a season, the first beginning in April or early IMay, and the second 

 in June. The earliest nest of wliich I have record is one containing three eggs, 

 April l(i, 1915 (DuBois, IMS). The latest date for eggsi of what is evidently tho 

 first brood, is May 20, 1900, at Lewistown (Silloway, 1903a, p. 41 ). The earliest 

 date for young on the wing is :\[ay 5, 1916, at Button (DuBois, JIS). Second 



Fig. 20. Male Desert Horxed Lark; Duttox. 

 Photo by A. D. DuBois. 



brood nests may be found with eggs in June and July. The earliest date for 

 eggs is June 19, 1862 (Cooper, lS69b, p. 295), and the latest, July 18, 1874 

 (Coues, 1874b, p. 557). A second laying at Button had the last egg of three 

 deposited July 8, 1916. The eggs hatched July 17 and 18, and the young left 

 the nest July 28 (DnBois, MS). This gives a period of about twenty days from 

 the laying of the last egg to the hatcliing of the young. It would seem, figuring 

 at this rate, that there would be time for a brood to be reared bclwccn the middle 



