20 THE CANADIAN ENTOMOLOGIST. 



Mature larva of Thyreus nesstis Cram. — Two and a half to three inches 

 in length, tapering gently from the fourth segment to the head. Color — 

 uniform chocolate brown,"lhickly dotted over the body, and particularly 

 along the dorsal line, with dark umber, of which color are also the eight 

 lateral or stigmatal stripes. Anal horn on eleventh segment, very short, 

 one-fifth of an inch in length. Very sluggish in its movements, showing 

 none of the irritability of T. Abbotii when touched. When at rest, it 

 stretches itself at full length along the leaf, or leaf stem, of the plant on 

 which it feedSj never raising or retracting the anterior segments. 



Pupa dark brown ; formed either among rubbish on the surface of the 

 ground, or slightly beneath the surface. Tongue case internal, not visible 



Feeds on fuchsia. Pupa nth, 12th, 13th July. One imago on 8th 

 August. Two others not yet emerged, and probably will winter in the 

 pupa state. Notwithstanding the presence of the anal horn, and the 

 difference in habit betwixt it and Abbotii, I regard nessus as a true Thyreus 

 and recommend its restoration to that genus. 



Parthenos Jiiibilis Hiib.^ — ^I propose to substitute for the above generic 

 name, which is also occupied by a genus in Rhopalocera (Hiib. Verz. 

 bek. Schmett., p. 38, i8i6), the generic name Cafocalirrhus,XQ:id\.ngXh\x?, '■ 

 Catocalirrhus W. V. A., nubilus Hiib. My reason for changing the name 

 in Heterocera instead of in Rhopalocera (no law preventing it), is on the 

 ground of convenience, the butterflies having a majority of species in this 

 genus. Furthermore, I feel certain that after a little more investigation 

 we shall be able to refer Catocalirrhus to Catocala. 



W. V. Andrews, 36 Boerum Place, Brooklyn, N. Y. 



black variety of p. turnu?. 



Dear Sir, — 



In answer to Mr. W. H. Edwards' query concerning the northern limits 

 of the black variety of P. turnus % , I would say that at Omaha, in this 

 State, the dark variety is more frequently met with than the yellow one. 

 Here at West Point, the species is not so common on account of the 

 scarcity of its food-plants ; however, we have both varieties in about equal 

 numbers. The same can be said of this insect as far north as the Niobrara 

 River, where the species seems to become quite scarce. 



Lawrence Bruner, West Point, Nebraska. 



