10 THE CANADIAN ENTOMOLOGIST. 



Limenitis Ursula. Changed to astyanax by Butler, 1869, and 

 followed by Kirby and Scudder. Fabricius' Syst. Ent., 1775, named the 

 species astyanax. In Ent. Syst., 1793, he re-named it Ursula for the 

 following reason : It then stood in the genus Papilio, in which also stood 

 another astyanax. He therefore changed the name of the first to Ursula, 

 and by this latter the species has come down to this day. It is so figured 

 by Abbott & Smith, and by Boisduval & Leconte. That Fabricius was 

 right in so changing the name to avoid a duplicate in the same genus, is 

 undoubted, and although the species which still retains the name astyanax 

 has since been found to be the female of something else, and hence loses its 

 original name, there seems no good reason for disturbing Ursula. Fabri" 

 cius was right in making the change, and once right always right in such 

 a matter. Of course I do not allow or believe that proserpina is a variety 

 of Ursula ; it is as near art hem is as Ursula in some respects. 



ON THE LARVA OF PLUSIA BALLUCA. 



BY W. SAUNDERS, LONDON, ONT. 



In the second volume (1863,) of the Proceedings of the Entomological 

 Society of Philadelphia, I published a paper on some of our Lepidopterous 

 larvse, and among other descriptions there appeared one purporting to be 

 that of Plusia balluca. By some unfortunate mishap a description of 

 the larva of V. intcrrogationis was sent in place of the intended one of 

 balluca, and the mistake was not discovered until after the number had 

 been issued, while all trace of the original description of the larva of 

 balluca was lost. I did not again meet with this larva until the summer 

 of 187 1, when a fresh description was taken on the 15th of June, as 

 follows : — 



Length, 1.20 in. ; body thickest on middle and posterior segments, taper- 

 ng towards the Iront ; the body is arched or looped along the middle seg- 

 ments when in motion. 



Head rather small, bilobed, of a shining green color, with a few whitish 

 hairs. 



