500 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io4 



In our 1950 report we recorded a young bii-d from Cantaura. 

 Because of its immaturity it was not possible to ascertain to which 

 race it belonged. The area of origin is m.ore or less intermediate 

 between the range of B. v. scotinus and B. v. elutus. For aiding us in 

 critically determining the racial allocation of our present specimens 

 we are indebted to Dr. John T. Zimmer, who informs us that they 

 agree with the type and with four specimens of scotinus from British 

 Guiana — two from Surinam, and one from Merida, Venezuela. 



At Cantaura, shortly before sunset one was heard and seen calhng. 

 The call was identical in tone with those of this owl in eastern North 

 America but consisted of four notes, hoo, hoohoo, hoo. It is not 

 certain that this is typical of the present race, as these owls are not 

 common in the collector's area, and are rarely heard. Peterson 

 (1947, p. 133) gives the call of the North American races of the great- 

 horned owl as "thi-ee, five, or six uninflected hoots," usually five, 

 hoOf hoohoo, hoo, hoo. 



Glaucidiiim brasilianum phaloenoides (Daudin) 



Strix phaloenoides Daudin, Traits 4I6mentaire et complet d'ornithologie, vol. 2, 

 1800, p. 206 (Trinidad). 



No further specimens were collected, but three nests were found, 

 all in hoUowed-out termite nests. Two were found at Cantaura, 

 one about 40 feet above the ground, containing young (March 25), 

 and one about 20 feet up, containing three eggs (April 25). Both 

 adults were at the latter nest site, one in the nest hole and the other 

 either also in the hole or close to the entrance. The third nest was 

 found at Barcelona about 100 yards from the seacoast and about 10 

 feet above the ground ; it contained two eggs (May 28) . 



Rhinoptynx claniator damator (Vieillot) 



Buho Clamator Vieillot, Histoire naturelle des oiseaux de TAmerique septentrio- 

 nale, vol. 1, 1807, p. 52, pi. 20 (Cayenne). 

 1 ? , Caicara, March 11, 1950; gonads small; skull well ossified. 



The present example was taken at night in a large open field, near 

 deciduous seasonal woods. It was quietly perched on top of a taU 

 pole, apparently hunting in this manner rather than coursing back 

 and forth across the field in the manner of the barn owls (Tyto alba 

 stictica) which were also present. 



Family Nyctibiidae: Potoos 



Nyctibius grandis (Gmelin) 



Caprimulgus grandis Gmelin, Systema naturae, vol. 1, pt. 2, 1789, p. 1029 

 (Cayenne). Specimen collected. 

 1$, Caicara, December 28, 1952; gonads somewhat enlarged (small ovarian 

 yolks); skull not well ossified; bird very fat. 



