306 Proceedings of Indiana Academy of Science. 
MYIARCHUS FEROX PANAMENSIS Lawrence. 
Myiarchus Panamensis Lawrence, Ann. Lye. Nat. Hist. N. Y., vol. 
VII, 1862 (May, 1860), p. 284 (Isthmus of Panama). 
Subspecifie characters.—Similar to Myiarchus ferox venezuelensis, but 
larger; upper parts lighter and more grayish (less brownish), particu- 
larly on head and neck; yellow of lower parts paler. 
Measurements.—Male: wing, 87-96.5 mm.; tail, 80.5-93.5; exposed 
culmen, 17.5—21. 
Female: wing, 88.5-100.5 mm.; tail, 84-96; exposed culmen, 19-22. 
Type locality—Canal Zone, Panama. 
Geographic distribution—Panama and western Colombia. 
REMARKS.— This flycatcher is clearly but a subspecies of Myiarchus 
ferox ferox, being connected with that form throvgh Myiarchus ferox 
venezuelensis. 
MYIARCHUS FEROX ACTIOSUS Ridgway. 
Myiarchus ferox actiosus RIDGWAY, Proc. Biol. Soc. Wash., vol. XIX, 
September 6, 1906, p. 116 (Pigres, mouth of the Gulf of Nicoya, Costa 
Rica). 
Subspecific characters.—Similar to Myiarchus ferox: panamensis, but 
with upper parts anteriorly more grayish, posteriorly darker and paler, 
and yellow of lower surface paler. 
Measurements.'.—Male: wing, 92-97 mm.; tail, 85.5-91; exposed cul- 
men, 18.5-—21.5. 
Female: wing, 89.5-95.5 mm.; tail, 85.5-91; exposed culmen, 18.5-— 
Al lel aye 
Type locality.—Pigres, mouth of the Gulf of Nicoya, Costa Rica. 
Geographic distribution.—Pacific coast of Costa Rica. 
REMARKS.—This seems to be a well-differentiated race, distinguished 
from Myiarchus ferox panamensis as above noted, but it seems to be 
confined to Costa Rica. 
MYIARCHUS FEROX PHAEOCEPHALUS Sclater. 
Myiarchus pheocephalus SCLATER, Proc. Zool. Soc. Lond., 1860, p. 281 
(Babahoyo, western Ecuador). 
Subspecifie characters.—Similar to Myiarchus ferox actiosus, but gray 
of head and neck not so much tinged with olive brown; yellow of lower 
parts darker. 
Type locality—Babahoyo, western Ecuador. 
Geographic distribution. Ecuador and Peru. 
1 Ridgway, Bull. U. S. Nat. Mus., No. 50, pt. IV, 1907, p. 641. 
