the MallopJiaga of the Spitsbergen Expedition. 253 



Degeeriella actophilus Kcll. and Chap. 



Ninmis actophilus Kellogg and Chapman, New Mallo- 

 phaga, iii, p. 78, PI. VI, fig. 4 (28. ii. 1899). 



(a) ?. Bear Island (T. G. LongstafE leg.), 16. vi. 1921. 



(b) c^, 2 ?, 1 imm. Klaas Billen Bay (C. S. Elton leg.), 



15. viii. 1921. 



In both cases from Purple Sandpiper. D. actojohilus is 

 a common parasite of the smaller waders. 



Genus ESTHIOPTERUM Harrison. 

 Esthiopterum nigrolimbatum Gieb. 



Lipeurus nigrolimbatus Giebel. Insecta Epizoa, p. 233, 

 Leipsic (1874). 



3 $. Fulmar Petrel. Bear Island (J. D. Brown leg.), 

 16. vi. 1921. 



An abundant parasite of Fulmars both in the Pacific 

 and in the Atlantic. 



Host List with Parasites. 

 Corvus comix comix Linn. 



Philopterus corvi. 

 Branta leucopsis Bechst. 



Trinoton anserinum. 

 Anser brachyrhynchus Baillon. 



Trinoton anserinum. 

 Phalaropus fulicarius jourdaini Iredale. 



Trinoton anserinum. 

 Erolia maritinui marititna Briinnich. 



Menopon lutescens. 

 Philopterus fusiformis . 

 Degeeriella zonaria. 

 Degeeriella actophilus. 



Fulmarus glacialis glacialis Linn. 



Esthiopterum nigrolimbatum. 

 British Museum (Nat. Hist.), Feb. 1921. 



