MALLOPHAGA. 235 



the genus Menopon. The four new species and one new subspecies 

 occurring in this collection were described and figured by Mr. Carriker 

 and have been published elsewhere (1910). Two of the new species 

 belong to the genus Colpocephalum, as does also the new subspecies; 

 one to the genus Nitzschia; and one to the genus Menopon. Conspicu- 

 ous for its absence is Docophorus communis, one of the most widely 

 distributed species known, but this is due to the small number of 

 passerine birds from which parasites Avere taken. The fact that five 

 new forms were discovered in a collection of twenty-nine species is 

 remarkable, and should stimulate the collection of a large amount of 

 material in this order from the state. 



LIST OF SPECIES. 



The species are listed in the same order within the genera as that 

 used by Kellogg (1900) in his list of Mallophaga published by the U. S. 

 National Museum. The genera are arranged in accordance with the 

 several keys which Kellogg has published (1 903) . 



Docophorus lari Denny. — A number of specimens, male and female, 

 of this easily recognized species were taken from Lams argentatus 

 Pontoppidan. It was originally described from three species of gulls, 

 Larus islandicus (=L. glaucus), L. tridactylus (=Risso tridactyla), and 

 Denny reports it also from L. rissa (=Rissa tridactyla) , L. marinus, L. 

 argentatus, and L. ridibundus. 



Docophorus icterodes" Nitzsch. — ^This parasite is one of the very 

 commonest found on ducks, and was taken on the black duck. Anas 

 ruhripes (Brewst.), and on the wood duck, Aix sponsa (L.). Two 

 specimens were recorded from the pine warbler, Dendroica vigorsvi 

 (Aud.), but as D. icterodes is found only on ducks, this record is without 

 doubt due to straggling. I am informed by Dr. Ruthven that on the 

 same day that the warbler was captured several specimens of both 

 black ducks and wood ducks were taken, so that the straggling is readily 

 accounted for, and this latter record should not stand. 



Docophorus fusiformis Denny. — Three specimens, male and female, 

 were taken from the sanderling, Calidris leucophaea (Pallas). It was 

 described originally from Pisobia minuta, and has been found on other 

 species of that genus. The specimens agree closely with the figures 

 of Piaget and Kellogg. 



Docophorus cordiceps Giebel. — A single specimen, male, of this species 

 was found on the least sandpiper, Pisobia minutilla (Vieill). It has 

 been found on species of Tringa by Kellogg, and is reported from a con- 

 siderable number of Limicolae from Europe. It is probably closely 

 confined to this order of birds. 



Docophorus halieti Osborn. — A considerable number of specimens 



