NORTH AMERICAN LEPIDOPTERA. 237 



men is blackish gray throughout, and there is no trace whatever of 

 the yellow lateral patches. On the lower side the markings are re- 

 peated in both species, but in Plueton they are sharply and clearly 

 defined, while in Euterpe they are confused and somewhat indistinct. 

 The difference in shape of the discal mark of the primaries is very 

 decidedly displayed on the lower side, and in Euterpe there is a dis- 

 tinct linear discal mark on the secondaries absent in Plueton. In 

 Euterpe the hairy covering of the legs and lower side of the abdo- 

 men is blackish gray throughout, while in PJueton the clothing of 

 the legs is yellowish white mixed with gray, and the abdomen is 

 blue-black, with two faint white bands and a sparse covering of gray 

 hairs. In Phceton the antennre in both sexes are black throughout, 

 but in Euterpe the shaft is clear white, with the serrations blackish 

 brown. 



" I have no doubt, whatever, of the distinctness of this lovely 

 species, of which I have only seen the 9 example from which the 

 present description is taken. I have been careful to give a com- 

 parison between the two forms, though there can be no possibility, 

 except at the first glance, of confounding them. In shape of wings, 

 robust form of abdomen, and the structure of the antennae, Euterpe 

 approaches very closely to the little known Arctonotus lucidus. 



" The unique example was captured near San Diego, Cal., by the 

 late H. K. Morrison." 



In response to my request Mr. Edwards kindly examined the tibial 

 armature of his species for me, and writes : " I have carefully exam- 

 ined the tibial claws of my EuproHerpinns euterpe, and though the 

 general characters are the same, there is a little difference in detail. 

 In the first place in phceton the posterior claws, i. e., those nearest the 

 posterior base of the tibite are the longest, though all are of nearly 

 equal length. In euterpe the largest are those near the junction of 

 the tarsi. And in euterpe there are two claws to the tarsi, quite long, 

 which I cannot discover in either of my specimens of plueton. The 

 legs of euterpe appear to be altogether longer and more slender than 

 those of pJuetou." The species seems altogether to be a distinct one, 

 though quite possibly mixed with plueton in collections. 



