72 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
brownish olive; lesser wing coverts grape green; middle and greater 
coverts varying from hair brown to Chaetura drab, tipped with dull 
cream-buff to form two prominent wing bars; outer web of the large 
alula buffy brown; primaries and secondaries Chaetura drab, with the 
outer web edged with light yellowish olive; innermost tertial light 
brownish olive at tip and in a narrow line along shaft, varying 
through cream-buff to cartridge buff on the outer margins of the 
webs; rectrices dull light brownish olive, with the outer webs mar- 
gined lightly with buffy olive; anterior lores deep olive-buff, with the 
bristly feather tips dark neutral gray ; loral area immediately in front 
of the eye indistinctly hair brown, with shaft lines of dull Marguerite 
yellow ; anterior segment of eye ring dull chamois, posterior segment 
dull Marguerite yellow, produced slightly as an indistinct line behind 
the eye; side of head grayish olive, the tips of the feathers very 
faintly darker, and the shafts faintly paler, not, however, producing a 
distinct patch or spot; throat and upper foreneck light olive-gray, 
with the sides of the feathers spotted indefinitely with dull Margue- 
rite yellow, producing an appearance of irregular streaks : lower fore- 
neck and chest light grayish olive, washed with light yellowish olive ; 
lower breast, abdomen, and under tail coverts primrose yellow, be- 
coming Marguerite yellow at sides of abdomen; sides dull vetiver 
green merging gradually into the lighter color of lower breast and 
abdomen ; edge of wing dull colonial buff; under wing coverts be- 
tween cartridge buff and cream-buff; inner webs of secondaries 
cream-buff, becoming light vinaceous-buff in the inner webs of the 
secondaries. Bill dusky neutral gray, becoming dull olive-buff on the 
mandibular rami; tarsus and toes fuscous (from dried skin). 
Measurements.—Males (2 specimens), wing 64.3-65.3, tail 57.4- 
57-5, culmen from base 13.7-13.8, tarsus 14.4-14.5 mm. (The first 
measurement in each case is that of the type.) 
Range.—Isla Coiba, off the Pacific coast of Veraguas, Panama. 
Remarks.—Endemism found in the birds of Coiba Island, where 
these differ subspecifically from their respective mainland populations, 
is expressed in the main in definitely darker coloration, or in greater 
extension of the more heavily pigmented part of the plumage pattern. 
It is therefore of especial interest to note in the present bird a paler, 
grayer appearance when it is compared with its nearest mainland 
congener. Actually the two skins from Coiba are more similar in 
appearance to L. a. orenocensis Zimmer and Phelps from the Rio 
Orinoco in southern Venezuela, from which however they are easily 
separated by lighter color. 
The specific name is taken from the Greek, ‘80s, peculiar, distinct. 
