2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



Dilepis unilateralis (Rudolphi) Butorides virescens. 



Choanotaenia purina (Dujardin) Passer domesticus. 



Choanotdenia ransonii, new species Oavia immer. 



Larus argentatus. 

 atricilla. 

 delawarensis, 

 Philadelphia. 



Choanotaenia, species Larus argentatus. 



Hymenolepis anceps, new species Mergus serrator. 



Hymenolepis ardeae Fuhrmann Butorides virescens. 



Hymenolepis coronula Fuhrmann Glaucionetta clangula americana. 



Oidemia perspicillata. 



Hymenolepis ductilis, new species Larus argentatus. 



marinus. 



Hymenolepis fusus (Krabb) Larus argentatus. 



Hymenolepis haniulacanthos new 



species Marila americana. 



Hymetwlepis macracanthos (Linstow)- Mergus serrator. 

 Hymenolepis pachycephala (Linstow) _. Colymbus' holboelli. 



Hymenolepis podicipina Szymanski Colymbus auritus. 



holboelli. 

 Hymenolepis rostellata (Abilgaard) Colymbus holboelli. 



Gavia immer. 

 Hymenolepis tritesticulata Fuhrmann. Fulica americana. 



Marila marila. 



Mergus serrator. 



Oidemia deglandi. 



perspicillata. 

 Hymenolepis (Weinlandia), species Marila marila. 



Oidemia deglandi. 



Hymenolepis, species Larus delaivarensis. 



Hymenolepis, species Fulica americana. 



Rhabdometra similis Ransom Coccysus americanus. 



Diorchis acuminata Clerc Marila americana. 



Valipora m,utabilis, new species Nycticorax nycticorax naevius. 



Valipora parvispine, new species Gavia im,mer. 



Dioicocestus fuhrmanni Linton Colymbus auritus. 



holboelli. 



Diploposthe laevis (Bloch) Marila americana. 



Gyrocoelia milligani, new species Crocethia alba. 



Fimbriaria fasciolaris (Pallas) Mergus serrator. 



Oidemia deglandi. 

 Fimbriaria falciformis, new species Fulica americana. 



Clangula hyemalis. 



Oidemia deglandi. 



perspicillata. 



FOOD NOTES 



On account of their possible service in suggesting lines of inquiry 

 concerning life histories of the cestodes which are described in this 

 paper the following brief summary of food notes is given : 



