356 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
19. 
20. 
KEY TO LEPIDOPTEROUS LARVAE—Continued 
Caterpillars with long hair pencils, and with brushlike tufts of hairs 
or ‘“‘tussocks’’ on dorsum of some of the segments. 
Head red; a pair of long upright black hair pencils on prothorax, 
another one on the eighth abdominal segment; tufts whitish; a 
reddish dot on dorsum of the 6th and 7th abdominal segments. 
May—October___--_-_-_- Hemerocampa leucostigma (A. & S.), p. 406. 
Head and body yellow; a pale dorsal stripe; tufts yellow; a black 
spot behind each of second and third tufts on abdomen 
Hemerocampa definita (Pack), p. 407. 
Head black; body dark gray; tufts whitish; a pair of prominent 
black hair pencils on prothorax, and one on each side of the second 
abdominal segment-__-__-_~_-_-_-- Notolophus antiqua (L.), p. 407. 
Head black; body densely clothed in brown, gray, and blackish 
hairs; a pair of prominent hair pencils on prothorax and usually 
a dark tuft and 2 or 3 long pencils at anal end_Olene spp., p. 407. 
Head yellowish brown; body yellowish; clothed in whitish to yel- 
lowish hairs; long pencils orange and white; on sycamore 
Halisidota harrisit (Walsh), p. 387. 
Head black; body blackish, clothed in gray to yellowish hairs with 
an olive tinge; pencils brownish to black with some white; on 
deciduous growth. August—October 
Halisidota tessellaris (A. & S.), p. 386. 
Head black; body grayish white with black markings, clothed in 
grayish-white hairs; a row of black tufts on dorsum; the first and 
seventh abdominal segments each with a pair of long black 
pencils; on butternut, hickory, walnut, apple, ete. June—October 
Halisidota caryae (Harr.), p. 385. 
Head shiny black; body blackish; a row of tufts on dorsum mostly 
black, those on sides of abdominal segments 2 to 6 yellow, others 
black; tufts on thoracic and eighth abdominal segments longer 
and with some yellow or white hairs intermixed with the black; 
on deciduous growths. July—October 
Halisidota maculata (Harr.), p. 386. 
Head shiny black; body greenish white above, ventor blackish; 
clothed in fine yellowish hairs, a pair of long black pencils on 
first and third abdominal segments and a single one on the eighth; 
2 inches long; on apple, maple, and other deciduous growths. 
June—October sss 253 aes Acronicta americana Harr., p. 392. 
Head, cervical shield, and true legs jet black; body dull whitish; 
clothed in long yellowish hairs; single, long black hair pencils on 
abdominal segments 1, 3, 4, 5, and 8; on poplar and willow. 
July—-Octoberss=2a2 =e Acronicta lepusculina (Guen.), p. 391. 
Head greenish white or marked with black; body densely clothed 
in long fine curved white or yellow hairs, with a few bristly 
black ones on ends of body, turns darker just prior to pupation; 
on poplar, ete. August-September 
Acronicta leporina vulpina (Grt.), p. 391. 
Head rounded, yellowish; body white or yellow with venter black; 
a dorsal and a lateral row of black spots; densely clothed in long 
fine white or yellow hairs; a long black tipped hair pencil on the 
second and third thoracic and eighth abdominal segments; 
length about 1%4 inches. June—September 
Apatelodes torrefacta (A. & 8.), p. 420. 
Head brownish, mottled; thorax with 2 black transverse bands 
and long brown and white hairs projecting forward over the head; 
abdomen gray with wavy black lines and yellowish green spots, 
sparsely hairy; length about 24% inches. August and September 
Apatelodes angelica (Grt.), p. 421. 
Caterpillars bearing transverse rows of prominent branched spines. 
Head dark red; body brownish, mottled with yellow; spines 
light colored, some tipped with black; onelm. May—September 
Polygonia tnterrogationis (F.), p. 369. 
Head grayish in front and black on sides; body yellowish white; 
spines light, tipped with black;on elmandhop. May—September 
Polygonia comma (Harr.), p. 369. 
