SATYRODES I. 



ably, but less between themselves. In the images, CantJms is midway between 

 Portlandla and the other two. It has the habit of alighting on trees, like Port- 

 landla, and according to Mr. Fletcher, of facing about, and watching an ap- 

 proaching entomologist, also like that other species, but in the others there is 

 nothing of this. Both Portlandla and Canthus are attracted by sweet fluids, but 

 I have never observed this in the other two. Canthus has drifted about from 

 one genus to another in the Catalogues, being of late years classed with Neo- 

 nymplia. Mr. Scudder has done well to separate it, and give it a distinct genus, 

 which I have adopted, as it is largely based on the preparatory stages. 



Note. — Eukydice is not a North American butterfly, as I will show. A 

 species of that name was published by LinniBus, 1764, and its name was changed 

 by him, in 1767, to Canthus, Syst. Nat., 13th edition, p. 768, No. 129. " Alis 

 integerrimus f uscis : subtus primoribus ocellis quatuor, posticis senis. Papilio 

 Eurydice, Hab. in Amer, Sept." 



Fabricius, Syst. Ent., p. 486, No. 191, says : " Canthus ; alis integris, supra fus- 

 cis, immaculatae. P. Eurydice, Linn., Hab. in Amer. Boreali. Alae omnes 

 supra fuscse, immaculatae," etc. In Ent. Syst., III., -^. 157, he again describes 

 Canthus, " omnes immaculatge," etc., in same words as before, but gives as syno- 

 nym, Arganthe, Cramer, pi. 204, fig. C. D., besides Eurydice, Linn. Arrjanthe 

 is a South American species, without spots on upper side. The mistake in the 

 habitat was a common occurrence in the earlier days. The insect perhaps was 

 received from New York or Philadelphia and credited accordingly. 



Godart follows Linnoeus and Fabricius, translating their descriptions. The dis- 

 tinguishing character of Canthus, Linn, and Fab., is that the ujjper side bears 

 no spots ; it is immaculate. 



We first come on our Canthus in Boisduval's Lep. Amer., where it is well 

 figured. My copy has no text to this and half a dozen other plates, and how 

 this happened I never knew. But it is to be supposed that the text had been 

 duly printed when the plate appeared. Dr. Harris first called attention to the 

 fact that (7fm/7m.s, Linn., was not our species. He says: " This butterfly is figured 

 in Dr. Boisduval's Hist. des. Lep. de I'Amer., under the name of Canthus, Linn, and 

 Fab., but as it does not agree with the description of Canthtis, of Linn, or Fab., 

 I have thought it entitled to a new name," and he accordingly calls it Bolsdu- 

 vaU'd. I myself prefer to call it Canthus, Bois., the more, as since Boisduval's 

 publication, 1833, the species has usually been known, and most often treated of, 

 by that name. However, if Eurydice, Linn., had been the same species, I would 

 not at this late day substitute that name for Canthus. A name in use should 

 never be changed for an obsolete name, and the neglect to observe this common- 

 sense rule has worked a great deal of mischief. 



