176 Field Museum of Natural History — Zoology, Vol. IX. 



of outer tail feather, white. In immature and winter birds, the horn- 

 Hke tuft of feathers is lacking, or indistinct. 



Otocoris alpestris, and races. 

 Horned Lark. 

 See Nos. 216, 216a, and 216b. 



Family CORVIDi^:. Crows, Jays, etc. 



Subfamily GARRULIN^. Magpies and Jays. 



First primary, much shorter than second, always less than three 

 fourths as long as third ; fourth or fifth primary, longest ; bill, stout 

 and strong ; the nostrils, concealed by coarse hair-like feathers ; outer 

 tail feathers, shorter than middle feathers. 



* GROUP 1. Wing,^less than 5.50 inches long. 



Upper parts, pale blue or }nirplish blue; tail, 

 l)nght blue, barred with black and (except middle 

 feathers) tipped with white; wings, blue, marked 

 with white; under parts, ashy white; breast with 

 1)1 ack band. Cyanocitta cr is tat a. 



Blue Jay. 



See No. 218. 



* For ilirections for measurement, see page 21. 



