372 SYNOPSIS OF CANADIAN ARCTIADAE. 
P. rubricosa !—Harris. Arctia rubricosa, Harris’ Insects ; new edi- 
tion. : 
Antenne whitish. Palpi, head and thorax dark reddish-brown. 
Primaries dull reddish-brown, with the discal cell terminated by a 
blackish line, enlarged into a dot at each end. 
Secondaries paler in color than primaries, with a rosy tint becom- 
ing blacker behind. Inner margin and fringe of hind margin red. 
Under surface of both primaries and secondaries reddish except- 
ing along the hind margins. The lines which, on the upper surface, 
unite the dots on discal nervure, wanting. 
Abdomen red, with dorsal and lateral rows of black spots; under 
surface dull reddish-brown. Fore femora bright red. 
Length of body 4-5 lines. Wings expand 11-12 lines. 
The larva has been reared by D. W. Beadle, Esq., of St Cather- 
ines, who has kindly furnished me with the following notes: “ They 
were found in the fall, feeding on a young ash tree, near St. Cather- 
ines ; they spun a web over nearly the whole of the tree before they 
had done feeding, spinning as they fed, so as to keep themselves coy- 
ered, The web is not so dense as that of Clisiocampa Americana.— 
The larve were of a dingy smoke color, deepening into a dark brown. 
Hairs not stout and bristle like, as in ‘S. Isabella,’ but finer and 
softer, like ‘virginica.’ The perfect insect did not appear until the 
following spring.” 
Var. Secondaries reddish pink; hind margin widely bordered with 
dull blackish. 
This species closely resembles the European “ fuliginosa,’ and 
has usually been regarded as identical with it; Harris, however, held 
a different view, and named it rubricosa. The habits of the larve 
appear to be different, and there are slight differences also in the 
markings on the wings. In “fuliginosa,’ the black dots on wings 
are more prominent, and the red on secondaries much deeper and 
brighter in color. In “rubricosa”’. the secondaries are margined be- 
hind throughout with black, whereas in fuliginosa the red color of 
the ciliz encroaches upon the wing, especially towards the apex ; and 
the black is somewhat broken towards the anal angle into irregular 
spots; in the latter also the primaries are somewhat less transparent, 
and the dorsal spots on abdomen coalesce forming a macular band. 
Hab.—St. Catharines, (Mr. Beadle). Hamilton, (Mr. Reynolds), 
Matan. Gulf of the St. Lawrence, (Mr. Bell). St. Martin’s Falls, 
Hudson’s Bay Territory, (Dr. Barnston.) 
