THAYER AND BANGS : PEARL ISLANDS BIRDS. 149 



37. Ceryle inda (Linne). 

 Five adults, both sexes, Sau Miguel Island, February and March. 



BUBONIDAE. 



38. Otus choliba (Vieill.).i 



Six adults, both sexes, San Miguel Island, February and March. 

 In all probability the screech owl of the islands is not true 0. choliba, but 

 lack of material prevents us from forming any definite opinion. 



CAPRIMULGIDAE. 

 39. Nyctidromus albicollis (Gmel.). 



Five adults, both sexes, San Miguel Island, February and March. 



The Parauque of the Pearl Islands does not differ from that of the mainland 

 opposite, but to just what form the Panama bird should be referred is at 

 present uncertain. As a rule specimens from Panama and Chiriqui are larger 

 and darker than those from Guiana and Venezuela, but we have before us one 

 skin from Divala, Chiriqui, of the same small rufous type that is the prevailing 

 bird in Guiana and Venezuela. It is a ^, and its wing and tail are half an 

 inch shorter than in any other specimen from the same region, and its general 

 coloration much more rufous. Can it be possible that these small rufous 

 examples in reality belong to a species distinct from the larger darker bird ? 

 It is difficult to see how any other explanation can accoimt for their presence 

 in the same region with the other kind, and for their being so much alike, 

 ■whether they come from Guiana or Chiriqui. 



TROCHILIDAE. 



40 Phaethornis hyalinus Bangs. 



Phaethornis hyalinus Bangs, Auk, vol. 18, pp. 27-28, January, 1901. 



Five adults, both sexes, San Miguel Island, February and March. 

 These specimens, exactly like the original three, confirm the characters of 

 this well-marked island species. 



41. Saucerottea edwardi (Delattre awd Boure). 

 Eight adults, both sexes, San Miguel and Saboga Islands, March and April. 



^ One hardly recognizes " Megascops brasiliana (Gmel.) " under this name, but 

 according to Von Berlepsch the bird must be known by this specific title, while 

 Stone has shown that Otus must replace Megascops. 



