354 BIRDS 



man, and the mainland from southern Mexico to Costa Rica. The nearest rela- 

 tive is V. crassirostris alleni Cory of Grand Cayman. They are probably of 

 fortuitous origin in the Bahamas. It seems particularly strange that no vireo 

 of this section has ever been found in Haiti. 



27. Callichelidon cyaneoviridis (Bryant). The only peculiar genus devel- 

 oped amongst the Bahama birds. It finds its nearest ally probably in Lampro- 

 chelidon of Haiti and Jamaica, though it must be admitted that the immature 

 Bahama Swallow closely resembles Iridiprocne bicolor (Vieillot). 



28. Dendroica petechia flaviceps Chapman. Closely related to D. p. gund- 

 laclii (Baird) of Cuba. Forms of Dendroica petechia (Gmelin) are found in 

 the Greater Antilles, the northern Lesser Antilles, and the Galapagos Islands. 



29. Dendroica pityophila bahamensis Cory. Closely related to Dendroica 

 pityophila (Gundlach) of western Cuba, where it lives exclusively in the pines 

 of the mountains, so far as known. D. pityophila (Gundlach) has never been 

 taken even in the Isle of Pines, an island so recently, geologically speaking, con- 

 nected with Cuba as not to have developed a peculiar fauna, except in the case 

 of sheels, a few birds closely related to Cuban species, and a peculiar rat, 

 Capromys prehensilis gundlachi Chapman. 



30. Dendroica vigorsii achrustera Bangs. 



31. Dendroica vigorsii dbacoensis Ridgway. Closely related to Dendroica 

 vigorsii (Audubon) of the eastern United States, probably reaching the Baha- 

 mas by way of Florida. 



32. Geothlypis rostrata Bryant. 



33. Geothlypis maynardi Bangs. 



34. Geothlypis tanneri Ridgway. 



35. Geothlypis incompta Ridgway. 



36. Geothlypis exigua Ridgway. 



37. Geothlypis coryi Ridgway. 



38. Geothlypis flavida Ridgway. These puzzling birds have been, prob- 

 ably along with Geothlypis beldingi Ridgway of lower California, derived from 

 the same "original stock" as the forms of G.trichas (Linne), which came 

 originally from the south by way of Mexico, producing a form in lower Cali- 

 fornia and sending another by way of Florida to the Bahamas. G. beldingi 

 Ridgway, from the island nature of its habitat, being surrounded on the north 

 by deserts and on the south by the sea, has resulted in producing the same 



