140 THE AMERICAN NATURALIST [Vol. XL VII 



livia, immediate ancestor of the domestic pigeon, has two 

 Mallophagan parasites of which one, the wide-spread 

 Lipeurus baculus, is found on the domestic pigeon. The 

 other species, Goniocotes compar, is common to several 

 other wild doves, but, curiously enough, it has not been 

 recorded from the domestic pigeon. The isolated Gala- 

 pagos Island dove, Nesopelia galapagoensis, peculiar, 

 both in genus and species, to these islands, is parasitized 

 by Lipeurus baculus, and by four other Mallophagan 

 species not found on any other pigeons. 



From the hoazin, strange aberrant bird of the Amazon 

 forests, and single representative of the order Opistho- 

 comiformes, I have recorded three Mallophagan para- 

 sites, two of them new species, and one a member of the 

 genus Goniocotes, a genus rather characteristic of the 

 pheasants and pigeons. It is exactly to the pheasant- 

 like birds that ornithologists seem at present inclined to 

 associate this lonely South American bird. 



The Ealliformes, or rails, gallinules and coots, are 

 represented in the Mallophagan host list by twenty-three 

 species. One small genus of parasites, Oncophorus, is 

 almost limited to the order. The old world coot, or 

 mudhen, Fulica atra, has seven Mallophagan species rep- 

 resenting six genera. Its congeneric sister species of the 

 new world, Fulica americana, has twelve Mallophagan 

 species, of which five are identical with those found on 

 the old world coot. The parasite species Oncophorus 

 bisetosus occurs on six different rails, three of them 

 North and Central American and three of them Malay- 

 sian and Australian. 



The Podicipedidiformes, or grebes, are represented in 

 the host list by six out of the 25 known species of the 

 order, from which are recorded eight Mallophagan kinds. 

 On five of the six grebe species occurs the Mallophagan 

 species Menopon tridefis, found elsewhere also on certain 

 loons, auks and ducks. The six grebes are geographic- 

 ally distributed as follows: two new world, three old 

 world, and one circumpolar. 



