LLMENITIS I. 



shorter of which is perpendicular to the other ; the mesonotum moderately pi'om- 

 inent, with a slight, blunt carination at summit, and a small conical tubercle on 

 either side ; on the middle of dorsum is a prominent, rounded, thin-edged appen- 

 dage, corrugated, especially at base ; color of wing-cases and anterior parts silvery- 

 gray, the former tinged with brown, or pale black along their hind margins ; 

 there is some variation in the color of the wing-cases, from a lighter to darker 

 shade, and the posterior part of the head-case is somewhat iridescent ; dorsal side 

 of abdomen yellow-white, towards extremity gray ; on the ventral side almost 

 wholly gray and brown ; the dorsal appendage dark smoky-brown ; at base of 

 this is a dark brown demi-band, crossing three segments; the surface of the seg- 

 ment next before and next after the appendage, as well as ))etweeu it and the 

 wing-cases, silvery and corrugated. (Figs, g, g"^.) Duration of this stage nine to 

 ten days. 



This species, mostly in the form Lamina, inhabits the northern parts of the 

 continent, east of the Rocky Mountains, and as far to the southward as the 

 Hoosac Mountains of western Massachusetts, the Catskills of New York, south- 

 ern Michigan and Wisconsin ; to the eastward, as far at least as the St. Law- 

 rence ; also Nova Scotia and Newfoundland. The form Proserpina is limited to 

 special localities or districts in the southern area of the species. In the Cats- 

 kills the two are always found associating together, but the black is much less 

 numerous than the other, the proportion apparently being about as one to ten. 

 Mr. Mead, writing of his experience in these mountains, says: " When I collected 

 every Prosei'jjina I could find, I took 110. Of Arihemis I actually did take 

 about 200, and could have taken a thousand without any difficulty," My own 

 collecting there during several seasons shows substantially the same results. But 

 in the Adirondacks of northern New York, where Arthemis abounds, Mr. W. W. 

 Hill, in four seasons collecting, has seen no example oH Proserpina. So Mr. A. 

 E. Graef states that he found Arthemis abundant in the Adirondacks, but saw no 

 Proserjnna. 



Professor S. H. Peabody writes that he collected in the Hoosac Mountains the 

 last week of June, 1873, and Arthemis was abundant. In 1875, was in Vermont 

 the middle of July, and walked up the western slope of Mt. Mansfield, the highest 

 of the Green Mountain range. He found Arthemis plenty, but neither there nor 

 in Massachusetts has he seen Proserpina, and does not know of the latter having 

 ever been taken in Vermont. Mr. C. H. Roberts, of Factory Point, southern 

 Vermont, says "Arthemis is found abundantly in this region, and I have taken 

 it in several counties of this State. I have collected for seven years, and have 



