158 



bulletin: museum of comparative zoology. 



Characters. — Similar to T. cana cana Swainson, but larger with a larger bill; 

 brighter blue, less greenish, on margins of wing and tail feathers ; lesser and 

 middle wing coverts darker and brighter blue — smalt blue ; the contrast be- 

 tween colors of smaller wing coverts and bastard wnng and edging of larger 

 wing feathers not marked, as is the case in T. cana cana ; rump and upper tail 

 coverts, usually, decidedly bluer, less greenish. 



ileasurements. — 



No. 

 14,482 



A. 



B. 



C. 



D. 



40.556 M. C. Z. 



40.557 M. C. Z. 



40.558 M. C. Z. 



40.559 M. C. Z. 

 4,984 



4,986 

 14,485 

 14,487 



I. 



J. 



K. 



40.560 M. C. Z. 



40.561 M. C. Z. 

 14,483 



N. 

 40,5()2 M. C. Z. 

 40,563 M. C. Z. 

 14,489 

 14,491 



Sex. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 

 S ad. 

 S a.l. 

 $ ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



ad. 



Locality. 



San Miguel Isl. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 

 Saboga Isl. 



do. 



do. 



do. 



do. 



do. 



do. 

 San Miguel Isl. 



do. 



do. 



do. 

 Saboga Isl. 



do. 



Wing. 

 92.5 

 91 

 93 



91 



93 



92 



92 



91.5 



91.5 



92 



92 



92 



93.5 



90 



92.5 



94 



91 



92 



88.5 



86.5 



85.5 



86.5 



87 



87 



Tall. 



66.5 



66 



66 



65 



67 



62 



63 



64 



64.5 



64.5 



64 



64 



67 



64 



64 



67.5 



65 



67 



62 



61 



61 



61 



62 



60.5 



Tarsus. 

 19.6 

 20 

 20 

 20 

 19.8 

 20.2 

 19 

 20 

 20 

 19.2 

 20 

 19.4 

 20.4 

 20 

 20.4 

 20.6 

 20 

 19.6 

 20 

 19.8 

 19.6 

 20 

 20 

 19.2 



Exposed 

 Culmen. 



15 



14.2 



14 



14.2 



14.4 



14 



14 



14 



14.2 



14.2 



14.8 



14 



14.8 



14 



14.2 



14 



13.8 



14.2 



14 



14 



13.4 



14 



13.4 



13.2 



Remarks. — The combination of several slight differences distinguishes the 

 blue tanager of the Pearl Islands from that of the mainland. Of these its 

 larger bill is its best character. Its wings and tail average much brighter and 

 darker Ijlue, and the form averages a little larger. It is, however, a closely 

 related subspecies, and some single individuals might prove troublesome, but 

 in series the differences stand out fairlj' well. 



*86. Piranga rubra rubra (Linne). 



Three specimens, one male and two females, Saboga Island, April 5, 10, 

 and 12. 



