ARCTIA CATA. 61 
emerged—two-lobed, a very beautiful and richly marked speci- 
men. On the lower wings the black spots, which are unusually 
large, are confluent in each line. Jan. 19th: this female, after 
pairing with an equally fine third-brood male (see Jan. 10th), 
laid a large batch of eggs. All proved infertile. Hard frost 
again. Feb. 3rd: (B) only eleven larve living, Feb. 20th: 
only two left, in their third skins, and evidently hybernating. 
Very cold, frosty ; S.E.; ther. 62°, 11 p.m. Feb. 27th: one of 
the two larve died. March 15th: (B) the intensely cold N.E. 
breeze changed to a cold S.W. wind with rain. Larve still 
hybernating, March 18th: the last second-brood larva died! 
Third brood.—Oct. 2nd: hatched. Oct. 11th: changed their 
first skins; beautiful weather; warm. Oct. 15th and 16th: 
changed their second skins; storms of wind and rain from the 
N.W.; cold. Oct. 18th: eggs (see Sept. 25th) put out of 
doors, hatched. Oct. 22nd: indoor larve changed their third 
skins. Noy. 2nd: changed their fourth skins. Nov. 11th: 
changed their fifth skins; cold weather. Nov. i4th: the larve 
out of doors (see Sept. 25th) are still in their first skins. They 
eat a little. hey all died just before Christmas. (I have fre- 
quently tried to bring larve of A. caia, A. villica, and A. fuligi- 
nosa through the winter, out of doors, and have always failed). 
Nov. 30th: frost broke up; thaw from the N.W. The third 
brood are nearly all full grown. They have done well, so far, and 
look healthy, excepting a few deaths chiefly during the severe 
weather. Dec. 3rd: they begin to pupate. Jan. 2nd: one 
pupated ; bitterly cold again. Jan. 10th: a mono-lobed male— 
the darkest “variety” yet — emerged; upper wings almost 
covered by the chocolate blotches. On the lower wings the two 
rows of black spots are simply a couple of black but irregular 
bands. This specimen paired with the second-brood female 
which appeared Jan. 12th. Ther. 62° at 9 p.m.; frost only 3° 
last night; skated again to-day. Jan. 20th: complete thaw; 
rain; S.W.; slight frost at night. An exceedingly small, two- 
lobed female appeared. Jan. 21st: hard frost. A larva pupated 
without spinning a cocoon. Jan. 27th: a crippled, two-lobed 
female.: Jan. 28th: another female—a fine type specimen. 
Feb. 6th: half a dozen cocoons, on being opened, proved that the 
larve had died without pupating. Feb. 12th: a larva pupated. 
Feb. 20th: only eight larve left of the third brood, seven in 
their third skins evidently hybernating, and one ready to pupate. 
March 2nd: commenced to “harden off”? the remainder by 
placing the pot at a warm south window. ‘They are, in size and 
appearance, exactly like hybernated larve. They move about a 
little, but do not eat. Young spring nettles are available, and I 
use them. March 9th: still hybernating. A hard frost. The 
specimen referred to on Feb. 12th emerged,—a very common- 
place, typical female, except that the fore wings appear as if 
