639 



to the eoiTespaudiiig numbers in von Linstow's Com- 

 pendium of Helmintliology (ii^T8, 1885)). 



Fm- the revision of tlie host names I am indebted to 

 Drs. Fisher and Palmer, of the Division of Ornithology. 

 As many of the host names used by helminthologists 

 are not used by modern ornithologists, these gentle- 

 men have traced out the proper names of the birds in 

 question from the host names given in helminthologi- 

 cal articles. 



In noting the species of parasites under the various 

 hosts, it has been extremely difficult to determine what 

 records should be accepted and what ones should be 

 rejected. As nearly all of the older records are based 

 ui)on determinations by external form instead of in- 

 lerunl anatomy, I believe the time has come when we 

 sliould begin an entirely new series of records of 

 hosts.^ 



All records of tapeworms, except in the case of typi' 

 s[)ecimens where the determination has been made 

 solely upon external form, should. I believe, be taken 

 only as approximate and provisional. 



iThis can easily be accomplished if helminthologists will des- 

 ig'nate all new records in some way. In the Revision of the 

 Adult Cestodes of Cattle, Sheep, and Allied Animals, and also 

 in my recent article on Fasciola magna, I have commenced 

 such a new series of host determinations for the parasites of 

 the domesticated animals by starring (*) the parasites under 

 each host in those cases where I have examined the species 

 of parasites from the host in question (or from ntaterial said 

 to liave come from that host, as T. denticulata. for instance. 

 This latter record is. in my opinion, erroneous.) 



