102 BANGS — A NEW MAGPIE-JAY EAS 
certainly refer all birds from south of Guatemala. It may be 
known as 
Calocitta formosa pompata subsp. nov. 
Type, from Bolson, northwestern Costa Rica, adult <7, no. 21,098 Bangs 
coll. in Mus. Comp. Zodl., collected Dec. 19, 1907, by C. F. Underwood. 
Characters.— Slightly the smallest of the three races. Differs in color 
from C. f. azurea in being much paler, grayer, less intensely blue above, 
with occiput ‘light cadet blue’ instead of ‘flax-flower blue.’ It agrees 
with that form in entirely wanting a black malar patch, and in having long 
white tips to rectrices. 
From C. f. formosa the new form differs in lacking all black on malar 
region and occiput; in having more white on rectrices; in having the sides 
of head, throat and chin suffused with blue. The upper parts, however, 
except for the lively blue occiput, are but little brighter, though of a dif- 
ferent shade. The back in C. f. formosa is plain ‘ash gray’; in the new 
form the back is ‘cadet gray.’ 
The names of colors used, are in accordance with Ridgway’s ‘Color 
Standards and Nomenclature.’ 
MEASUREMENTS (in millimeters). 
No. Sex Locality Wing Tarsus Culmen 
21,098 (type) 3 Bolson, Costa Rica 191 48.0 S180 
21,099 of Sy ee a 184 47.5 350) 
21,101 of cs oe = 188 48.5 32.0 
21,102 fot = ge “ 191 46.0 35.0 
21,096 o& Tenorio, ey it 188 47.0 33.0 
21,100 2 Bolson, ae ce 188 43.0 32.0 
21,095 2 Tenorio, a y 188 46.0 34.0: 
21,097 fe) < ‘e ee 184 45.0 33.0 
17,200 9 Miuravalles, ‘“ “ 185 44.5 sl 
