148 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY, 



South America, it is very likely the dove in question never came from the 

 Pearl Inlands, or, as we have said above, if it did, its occurrence there must be 

 looked upon as purely accidental. 



32. Colurabigallina nifipennis rufipennis (Bp.) 



Twelve specimens, adults of both sexes, San Miguel and Saboga Islands, 

 February, March, and April. 



It might be expected that a bird of such feeble flight as the ground dove 

 would become modified in some way upon these islands where so many other 

 birds are different from their niaiidand representatives, but we are unable to 

 find the slightest diflference between the Rufous-winged Ground Doves of the 

 Pearl Islands and the continent. 



33. Leptotila verreatixi Bp. 



Eleven specimens, adults of both sexes and young, San Miguel and Saboga 

 Islands, February, March, and April. 



If it should be found necessary to recognize the Central American form as 

 Leptotila verreauxi riottei Lawr. (type from Navarro, Costa Rica) ^ on account 

 of its slightly darker brown, back, wings, and upper surface of tail, the Pearl 

 Islands bird will be included with true L. verreauxi of South America. 



CUCULIDAE. 



34. Crotohaga ani Linxe. 



Nine specimens, adults of both sexes and one young (March 28), San Miguel 

 and Saboga Islands, February, March, and April. 



PSITTACIDAE. 



35. Amazona salvini Salvadori. 



Seven adults, both sexes, San Miguel Island, March. We can find no con- 

 stant differences between these and specimens from Panama and Chiriqui. 



ALCEDINIDAE. 

 36. Ceryle torquata (Linne). 

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



' The range of this form extends from Costa Rica to Panama, while the paler 

 true L. verreauxi occupies the whole of northern South America and the Pearl 

 Islands. 



