18. (1) 
iD: 
(2) 
(3) 
(4) 
(5) 
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) 
Oak, birch, poplar, ete—Head yellow and_ black; 
body dusky with 5 pairs of blue spots followed by 
6 pairs of red spots on the back 
Porthetria dispar. 
Poplar and willow—Head black with bluish tinge; 
body blackish, with a row of white blotches on top 
and a narrow, broken, subdorsal line; sides mottled 
with black and «whites. Stilpnotia salicts. 
Poplar, sugar maple, tupelo, ete.—Head and body pale 
bluish; a row of keyhole-shaped white spots on 
the “dorsum: Gs. ee eee Malacosoma disstria. 
Persimmon, palmetto, ground oak—Head orange 
brown; front of prothorax, legs, anal segment, and 
undersurface of body yellowish green to orange; 
tops of other body segments crossed by 2 yellowish 
stripes and a row of orange-colored warts 
Seirarctia echo. 
Ash, basswood, elm, maple, oak—Body flattened, 
gray, and with faint longitudinal lines; lateral lap- 
pets with long hairs, forming a fringe around the 
body; a pair of warts bordered by a black band on 
eMC OT Ax eer ei he aa lia ee Tolype velleda. 
Elm, maple, poplar, sycamore, willow, ete.—Head red; 
a pair of long, black hair pencils on prothorax and 
another pair on the 8th abdominal segment; red- 
dish dots on top of 6th and 7th abdominal seg- 
ments; tufts whitish 
Hemerocampa leucostigma. 
Various hardwoods—Head black; body dark gray; 
tufts whitish; a pair of black hair pencils on top 
of prothorax and one on each side of the 2nd 
abdominall.seg@ment =... 8. Orgyia antiqua. 
Sycamore—Head yellowish brown; body yellowish, 
clothed in whitish to yellowish hairs; long orange- 
Colored: -nairpencils |. 2 Halisidota harrisit. 
Various hardwoods—Head black; body blackish, 
clothed in gray to yellowish hairs with an olive 
tinge; hair pencils brownish to black with some 
MEIC pe ee eee egies Halisidota tessellaris. 
Butternut, hickory, walnut—Head black; body grayish- 
white with white markings, clothed in grayish- 
white hairs; a row of black tufts on the dorsum, 
and 2 long black hair pencils on 2nd thru 6th 
apaominal SE@MENtS sxxecceccks. Halisidota caryae. 
Apple, birch, maple, oak, aspen, ete.—Head black; 
body blackish; row of mostly black tufts on dor- 
sum; yellow tufts on sides of abdominal segments 
2 to 6; others black; tufts on thoracic and 8th 
abdominal segments longest and containing some 
yellow or white hairs .................... Halisidota maculata. 
Apple, maple, etc.—Head shiny black; body greenish 
white above and blackish below; clothed with fine 
yellowish hairs; 2 long black hair pencils on each 
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