52 THE CANADIAN ENTOMOLOGIST. 



I 



in the Adirondacks of New York ; common in middle Michigan, and in 

 certain localities in Wisconsin. Had not been seen at Toronto, Canada, 

 but occasionally was noticed at Hamilton. That is, along a line of i,ooo 

 to 1,500 miles on the southern border of the range of Arihemis, and the 

 northern border of the range of Ursula, at a few spots only had Proser- 

 pina been observed east of Michigan (to the west there is no definite 

 information). The only region where Proserpina was known to be 

 abundant is in the town of Hunter above spoken of. All this appeared 

 from the evidence spread out in the Butt. N. A.; and Mr. Scudder has 

 been able t(j add nothing to it but this, that in " the Graylock Hopper" 

 (an elevated valley in the mountain-^) at Williamstowii, Mass., Proserpina 

 was " tolerably comm )n " As to its abundance at Stony Clove we have 

 the direct testimony of Mr. Mead, who also collected there year 

 after year. Speaking of one year he says : — '• WHien I collected 

 tvevy Proserpina I could find I took i[o, of Arthemis I actually did 

 take about 200 and could have taken i,ooo without any difficulty. 



7. In all the preparatory stages Proserpina and Arthemis are precisely 

 alike, and both are specifically removed from Ursula. Witness the figures 

 of the eggs, Arthemis, Butt. N. E., pi. 64, fig. 15 ; Ursula, fig. 12. I 

 have Mrs. Peart's drawings of the eggs of both Proserpina and Arthemis, 

 and they are indistinguishable. In the first two larval stages all this group 

 are alike, but at second moult each species takes on characters of its own. 

 Fig. 26, pi. 74, given by Mr. Scudder as Arthemis mature larva is copied 

 from Trouvelot's drawing of Proserpina (made for me and loaned for use 

 in the Butt. N. K). This drawing is named on its card Proserpina, and 

 of course, in giving it on his plate as Arthemis, Mr. Scudder was satisfied 

 that it answered equally well for either form. I have another drawing of 

 Arthemis at the same stage, made by Mrs. Peart, and all its peculiarities 

 are shared by Proserpijia. These are widely different from the mature 

 stage of Ursula, zs is plain trom Mr. Scudder's figures of the latter, pi. 17, 

 figs. 17, 21. Just so, the pupae oi Arthemis and Proserpina are alike (I have 

 drawings of both), and differ specifically in form and colour from the pupa 

 of Ursula, Butt. N. E., pi. 83, fig. 12, for Ursula; fig. 14 for Arthemis, 

 copied from Mrs. Peart's drawing of Proserpina. So we have, on the one 

 hand, the two co-forms, alike in each and all of the three earlier stages, and 

 alike in size and shape of wings in the imago, (and Mr. Scudder allows this 

 to be the fact, by using the drawings of larva and pupa of the co-forms in- 

 terchangeably); on the other, Ursula, differing distinctly in the three stages, 



