140 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Mourning Dove. 



* GROUP 2. Wing, over 6.50 inches long. 



Passenger Pigeon. 



Decidedly larger than the Mourning Dove; length, over 14 inches; 

 wing, over 7 inches; most of back and rump, bluish slate color; tail, 

 pointed and rather long; under tail coverts, white; under parts 

 vinaceous, shading into white on the lower belly (male). Female, 

 similar, but duller; breast, pale grayish brown; immature birds have 

 the primaries marked with rufous. Ectopistes migratorius . 



Passenger Pigeon. 

 See No. 147. 



*For directions for measurement, see page 21. 



