1914 



THE BUTTERFLIES OF NEW ENGLAND. 



Scudder a very much injured specimen of Phorocera from Cinclidia har- 

 risii and a puparium from Polygonia comma. 



[A detailed account of the actions of a Tachina in laying her eggs upon 

 a caterpillar is given by Mr. A. C. Weeks (Ent. Amer., iii, 126).] 



LIST OF BUTTERFLIES AND THEIR DIPTEROUS PARASITES. 



Hosts. Parasites. 



Chlorippe celtis Phorocera edwardsii. 



Anaea andria Phorocera edwardsii. 



Polygonia comma Unkuown Tachinid. 



Eu Vanessa antiopa.... Phorocera edwardsii. 

 Masicera (Phorocera?) 

 sp. 



Vanessa atalanta Exorista fulilis. 



Vanessa cardui Exorista blanda. 



Argynnis cybele Phorocera saundersii. 



Cinclidia harrisii Phorocera sp. 



Anosia plexippus Masicera archippivora. 



Thecla calanus Exorista theclarum. 



Thecia autolycus Exorista scudderi. 



Hosts. Parasites. 



Cyaniris pseudargio- 



lus Exorista theclarum. 



Syneches pusillus. 



Pieris rapae Exorista hirsuta. 



Jasoniades glaucus... Masicera frenchii. 

 Heraclides cresphon- 



tes Masicera rileyi. 



' 'Papilio" sp Masicera archippivora. 



Epargyreus tityrus. . .Acroglossa hesperida- 

 rum. 



Thanaos brizo Exorista blanda, var. 



Proserpina. 

 Megathymus yuccae.. Phorocera comstocki. 



LIST OF DIPTEROUS PARASITES AND HOSTS. 



Parasites. 

 Acroglossa hesperida- 



rum 



Exorista futilis 



Exorista blanda 



Exorista blanda, var, 



proserpina 



Exorista hirsuta 



Exorista theclarum.. 



Exorista scudderi. . . . 

 Phorocera edwardsii. 



Hosts. 



Epargyreus tityrus. 

 Vanessa .atalanta. 

 .Vanessa cardui. 



Thanaos brizo. 

 Pieris rapae. 

 Thecla calanus. 

 Cyaniris pseudargiolus. 

 Thecla autolycus. 

 Chlorippe celtis. 

 Anaea andria. 



Parasites. Hosts. 



P. edwardsii (cont.)...Euvauessa antiopa. 

 Phorocera saundersii..Argyunis cybele. 

 Phorocera comstocki. .Megathymus yuccae. 



Phorocera sp Cinclidia harrisii. 



Masicera archippivora.Anosia plexippus. 

 "Papilio" sp. 



Masicera frenchii Jasoniades glaucus. 



Masicera rileyi Heraclides cresphontes, 



Masicera (Phorocera?) 



sp Euvanessa antiopa. 



Tachinid sp Polygonia comma. 



Syneches pusillus Cyaniris pseudargiolus. 



The following list of the European dipterous parasites of butterflies 

 makes no pretensions to completeness ; it contains all the references that I 

 have been able to obtain with the resources at my command. Indeed, as 

 it is, the number of references is chiefly due to the very great kindness of 

 Professor Mik. Such a list, even were it quite complete so far as the 

 literature is concerned, loses, alas, much of its value from the fact that not 

 much reliance can be placed on the specific names of some of the authors. 

 The yet unraveled synonymy, especially in the parasitic genera, of the 

 Evu'opean Tachinidae is frightful. May it never reach such a state in 

 America ! It is greatly to be regretted that we know so very little of this 

 family of flies, perhaps the most important among all insects in its eco- 

 nomic relations, in our own country. But, until the time shall arrive 

 when a better knowledge is possible, may the heedless describer beware ! 



