ACRONICTA. By Dr. M. Draudt. 
27 
with contrastingly brown hindwings. Canada to Texas. — The whitish larva with double black dorsal and lateral 
lines with long, light yellow hairs and black pencils on the 5th, 7th and 12 th rings, lives on maple. -—- f. obscura obscura. 
Ediv. is a darker form from Salt Lake City. — f. eldora Sm. (3 h) in contrast with it is lighter, more greyish- eldora. 
white, suffused with brown, with lighter greyish-brownish hindwings. Colorado. 
A. dactylina Grt. (4 c) is smaller, more bluish-grey, and above all with entirely white hindwings. dactylina. 
Characteristic is the posterior transverse line being single and only analwards proximally doubled by 1 or 2 
black crescents. Canada to Colorado. — Larva black, laterally yellowish, with dorsal reddish brown hair, and 
long black hair-pencils on the 5th, 7th, and 12th rings; on alders, willows, and birches. 
A. insita Wkr. (4 e) is much lighter than the preceding, the forewings are white, dusted with light insita. 
brown, the veins darker, otherwise marked very much like dactylina, but the postmedian runs differently, 
returning far to the lower cell-angle. Hindwing white with brownish veins and a smoky marginal area. The 
$ is darker brown. Canada to Colorado. — Larva yellowish with long, soft, yellow hair; on poplars. — f. denvera denvera. 
Sm. has smoother, yellowish-white, less dusted forewings; from Colorado. 
A. hesperida Sm. (4 d) resembles dactylina, but it is larger and much darker bluish-grey. The hind- hesperida. 
wings are not entirely white, but feebly smoky with darker veins. Canada, United States to California. The 
larva is black, with short dense hair in the shape of rings, so that the segmental indentations remain broadly 
bare; above the hair are red-brown, laterally whitish; on the 5th, 7th, and 12th rings one black pencil each. 
It lives on Alnus. 
A. hastulifera Sm. <£• Abb. is also like dactylina, but much lighter whitish grey, strewn slightly hastulifera. 
darker, larger than dactylina (4 e), with a slightly yellowish tint. The anterior transverse line is quite incomplete, 
the distal one single, behind it the marginal area darker; the anal sagitta is distinct, but it does not reach 
to the margin. Hindwing tinted yellowish. The $ is mostly much larger, more bluish-grey, the hindwing 
brownish-grey. Canada to California. — Larva dark brown, with short and dense hair, on the dorsum black 
mixed with white, laterally red-brown; on Alnus. 
A. impressa Wkr. (= fasciata Wkr., verillii G. <£• R.) (4 b). This species and the following are impressa. 
very much alike; both are smaller, dark insects; impressa is a somewhat larger species, with broader forewings, 
at the apex less pointed; it is more distinctly marked, less intensely strewn with black, only in the proximal 
half, as far as the posterior transverse line at most. The hindwing is generally somewhat darker. Canada, 
United States. —- The velvety black larva sublaterally striped reddish, with short, reddish-brown hair- 
tufts lives on willows, Prunus, Rubus, Ribes, and species of Corylus. — f. eniaculata Sm. (4 b) is a more bluish- emaculata. 
grey form with lighter, whitish hindwings. 
A. distans Grote (4 b) is smaller than impressa with narrower, more pointed wings; by more intense distans. 
black strewing the marking becomes more indistinct; the black inner-marginal dusting extends to the margin. 
The hindwing is somewhat lighter; Canada to New York. Larva also like that of impressa, luit. the hair-tufts 
on the rings 2 to 5 and 12 and 13 are red, the others light yellow. — f. dolorosa Dyar is a darker form from dolorosa. 
British Columbia. 
A. rubricoma Gn. (4 c) is more or less tinted yellowish, coarsely strewn with black, most intensely rubricoma. 
in the basal area, near, the reniform macula and behind the postmedian which itself is filled up with whitish. 
Canada to Texas. -—- Larva yellowish with a black, partly double dorsal stripe, and white hair-pencils on the 
rings 6 to 10 and 12. It lives on Celtis. 
A. longa Gn. (— xylinoides Gn., xyliniformis Gn., pallidicoma Grt.) (4 e) is rather variable, greyish- longa. 
white or reddish-grey, more or less strewn with black, at the base of the proximal margin whitish ; the antemedian 
is almost extinct; above the inner-marginal vein there is in the discal area a black streak, between the maculae 
there is a white spot; the anal sagitta is distinct. Hindwing purely white. Canada to Florida and Texas. — The 
blackish larva with thick brown, on the 5th ring red hair-tufts lives on low plants. 
A. extricata Grt. (4 c). Forewing white, densely covered with dark brown, larger than longa which extricata. 
it otherwise resembles in the marking. The posterior transverse line is more dentate, a black basal ray is present, 
and the cell-spaces in the marginal area are striped black. Hindwing semi-diaphanous white. Hitherto only 
known from Texas. 
A. sperata Grt. (4 f) is a smaller, brownish ashy-grey species with indistinct dark transverse markings sperata. 
behind which there is a darker part in the discal and distal areas. The brown ring-macula is very small, the 
reniform macula large, the postmedian proximally bordered with whitish. Hindwing purely white, only at 
the apex somewhat brownish. - — f. speratina Sm. is larger and lighter, the markings still more blurred. Canada speratina. 
and United States. — The larva is brown, dorsally shaded with blackish, with thick brown hair-tufts, and lives 
on low plants. 
