LIBRARY

436
COLLEGE ENTOMOLOGY
At least wart VI (subventraI) many-haired and distinct, secondary
hairs sparse or absent above prolegs . 60
53. Anal plate bifurcated, head roughly papillose; third ocellus very large
SATYRID£
Anal plate simple; head smoother; third ocellus rarely much enlarged.
. . 54
5'1. Larva pm-asitie, with hemispherical body and a complete circle of
uniordinal hooks. EPIPYROPID£
Larva more normal in shape, not parasitic . 55
55. Spiracles small, circular, ventral prolegs slender, more or less stemlike,
with expanded planta . PTEROPHORIDlE
Spiracles elliptical, larger; ventral prolegs short 56
56. Secondary setre dense . 57
Secondary setre very sparse or absent above prolege.; with simple seta!
or a few subprimaries 58
57. Notch of labrum deep, with parallel sides; anal prolegs full as strong
as the others; with warts more or less overshadowed by the sec·
ondary hair . A few NOCTUIDlE
Notch acute, with convergent sides; anal prolegs much reduced and
not used; warts rudimentary and dominated by a single hair (lvIela·
lopha) or absent (Datana) . • NOTODONTIDlE
58. Tubercle IV at about the same level on abdominal segments VI, VII,
and VIII . (Doa) LYMANTRUDlE
Tubercle IV much lower on seventh than on other segments; anal pro·
legs more or less reduced or modified . 59
59. Skin shagreened DIOPTIDlE
Skin not shagreened Most NOTODONTIDlE
60. Eversible mid-dorsal glands on two segments of abdomen LYMANTRIID£
No eversible dorsal glands. 61
61. Spiracles circular, small . 62
Spiracles elliptical, normal in size 63
62. Ventral prolegs short, with a straight band of heavy hooks
PYROMORPHIDlE
Ventral prolegs slender, with an expanded planta sometimes bearing a
circle of hooks PTEROPHOR.IDlE
63. Mesothorax with only a single large wart above level of spiracles
EUCHROMUD£
Mesothorax with two or three warts above level of spiracles. 64
64. Wart (or seta) tv at about the same level on seventh abdominal segment
as on the sixth and eighth . . . . . . . ARCTUDlE
Wart (or seta) IV much lower on seventh segment or absent (perhaps
fused with v) . . . 65
65. Hooks of prolegs even in length, or gradually becoming smaller at ends
of row . • .. A few NOCTUIDlE
Hooks of prolegs abruptly decreasing in size near each end PERICOPIDlE
66. Body without general secondary hair, often with a few subprimaries;
with not more than eight hairs on prolegs . . . . . . 67
Body with numerous secondary setre, at least on the prolegs; anal prolegs
always well developed . 72
p.510
p.463
p.475
p.477
p.478
p. 477
p.478
p.463
p.472
p.475