378 



U. S. NATIONAL MUSEUM BULLETIN 217 



WEIGHT 

 120 



10 



MAY 



20 





31 



JUNE 



10 20 30 JULY 



1 



20 



GRAMS 



F 





















110- 





f 

















40 



lOO - 







O 









ri 









90 









°8 

 o 







o o 

 o 



EREMOPHILA A. A. 



o 





• 34 



TESTES 

 BIG , 















m. 36.6 g s.d. 2.7 g. c.v. 7.4% 









MEDIUM . 























SMALL. 





88 



o 



o 







Q O 









FAT 























F. 















O 



o 







MF. 























LF. 





°8 



o 



o 















VLF. 





o 











OO O 









WEIGHT 



10 



MAY 20 



31 



JUNE 



!0 20 





3 JULY 



1 



SEPT 



7. 

 120 





F 

















110- 





O 















O 



100. 

 SO- 























o « 



oP 















SO- 

 TESTES 











TURDUS M. M. 

 m. 7 8.6g. s.d. 6. 



g- 



c.v.7.8 % 







BIG . 





8S8P°° 

















SMALL 





















FAT 



















O 



F. 





o 















OO 



MF. 





















LF. 





OO o 

















VLF 





OlX> o 















1 



Figure 27. — ^Top: Arctic horned lark, cf (EremophUa alpcstris arctica). Bottom: Robin, 

 cf {Turdus migratorius migratorius). 



