Vol. xxiii] ENTOMOLOGICAL NEWS. 57 



Sci., Vol. IV, pp. 457-499, Sept., 1902; and "A Second Collec- 

 tion of Mallophaga from Birds of the Galapagos and Revilla- 

 gigedo Islands and Neighboring Waters," by Kellogg, in Trans. 

 Amer. Ent. Soc., Vol. XXXII, pp. 315-324. Nov., 1906). The 

 birds of the Galapagos Islands are believed to be descendants, 

 either unmodified, or modified to be new species and new 

 genera, of species of the western coast of northern South 

 America, Central America and Mexico. 



In the light of this presumption and in the light of the fact 

 thac those Mallophagan species found so far on more than one 

 host species are usually found on related host species, the com- 

 parison of a Mallophagan collection from birds of the West 

 Coast of America (south of the United States) with the full 

 collections already made from the Galapagos birds might be 

 expected to turn up a number of interesting cases of host dis- 

 tribution. And this expectation finds some realization in tin- 

 present opportunity. 



Of the Mallophagan species included in this collection from 

 birds of the islands off Baja California, fifteen have been also 

 recorded from birds of the Galapagos Islands. Among these 

 cases of common occurrence the taking of Docophorus spcotyti 

 Osborn, recorded from Spcotyto rostratus and Speot\<to h\po- 

 gaca from Baja California, from Spcotyto sp. of the Gala- 

 pagos Islands is of special interest, as is the taking from Anons 

 stolidits of the Galapagos Islands of Colpocephaluni inillcri 

 recorded from Anous ridgivayi from Baja California. 



Docophorus acanthus Giebel. 

 A single specimen from Hacmatopns bachnianni, San Benito 



Island. 



Docophorus lari Denny. 



Two males from Aechmophorits occidentalis, Ensenada Tsl. 



Docophorus platystomus Nitzsch. 



Two specimens from Haliaectus Icucocephalus, Todos San- 

 tos Island. 



Docophorus californiensis Kellogg var. quadripustulatus var. nov. 



In the collection are four specimens that differ markedly 



from typical californiensis in having most of the hairs on the 



