Reproduction 61 
nim 
er Se Or ee Se ae 
¢ 
3 
Set complete (4 eggs), incubation n began, (nest no 
| ‘ Set complete (5 ens ine ubation began, eo no-43) 
Pirpt=egg laid (nest no. 14) 
First egg laid (nest no. 13) 
Nest building began (nests no. 13,14) 
First egg leid (nest no. 11,12) 
Set completed (nest no. 3) 
First <8 | laid (nests no. lg 
at ion Soin (ne . 3) 
First es a (nests no. cae ) 
= First egg laid (nest no.9) 
a 
g st building began (nesta no.3,4,5,6/7 tae 
o 
ee 
3 
i é 
Fe a 
2 i 
+) tee 
£ ee 
3 rhea 
~ pat ad 
: eS 
a 
= 
s >... 
Be ee 
Ee oe 
7 o @ te i 2 od _ > = 
ee ee 1 ‘ 4 
tT ' 0 o 
s 8 S: 8 88 3 
Fig. 6. Mean and minimum daily gi pra s and snow on the 
ground at 7:00 P. M., for April, 1926, t Evanston, Ill, with a 
tabulation of the breeding peach re of st Prairie Horned Lark 
during the month, 
820 21 2225 2425 26 2t 28 & sd 
7 181 
7 
14 1516 1 
10 1112 138 
ays 
a 
