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BULLETIN" 15 3, UNITED STATES NATIONAL MUSEUM 



its racial differentiation as might seem to be the case from a casual 

 reading of Grote's paper. 



I have carefully examined a series of 71 specimens of chelicuti and 

 one of damarensis. Because of the dispute as to the size criteria of 

 races I append a table of measurements which may serve to show the 

 factual basis on which I reject Tiylohlus Grote. Grote writes that if 

 this species had been a palearctic one, it would have long since been 

 split as he advises. But we do not yet know African birds with any- 

 thing like the intimacy of our knowledge of palearctic species, and 

 can not therefore judge such matters with the same degree of precision. 



