286 
MEMOIRS OF THE jS^ATIOI^f AL ACADEMY OF SCIENCES, j 
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Homs of caterpilliirB, origin of their position 22 
Horn, caudal 21, 2G 
Humps, origin of 20 
Hyphantria textor, origin of markings of 16 
Ichneumons, features deterrent to 170 
Ichthyurinie 35 
Imaginal cliaraciors, inheritance of 33, 34 
Incongruence between larval and adult characters of Kotodon- 
tiaus 27,29 
liiheritauco at corresponding periods of life 8. 38 
Insects, inctamorphic, genealogy of 56 
why so numerous in species and individuals 19 
Isolation 19 
J ugatie 57 
Lamarckism 20, 24 
Lamina siipraaualis 25 
Lan*a, campodea form 13 
eruclform 13 
generalized 8,9 
primitive 14 
L.arval characters 7 
inheritance of 33, 35 
Lasiocampidic, geographical distribution of. « 45 
Leaf, dead or brown portion of, protective resemblance of Noto- 
dontian larvit* to 201, 202, 205, 207 
Leindapteria, classification of 51, 56 
genealogical tree of. 83 
, hauatellata 61 
inheritance of acquired characters in 33, 36 
laciiiiata 58,61 
phytogeny of 51,56 
primitive features of 53,58 
stem foruiB of 54, 55 
venation of B4 
Limacodcs, origin of their larval forms 19 
Lines, origin of 15 
Lithacodia fasciola, ontogeny of 44 
Lithosia, the ancestor of Bomhyccs 32 
Lobe, iufraanal 26 
Macrurocampa, tiagollum of. 24 
Mandibles, vestigial, in Tineids, etc 18,55,59,283 
Markings, bright 180, 181, 215 
mimetic - 201, 207 
origin of 7, 11, 15, 16 
of wings 9,34 
Maxillae, vestigial 34 
Medium, direct action of. 16 
Megalopyge, pupaof. 76 
Megalopj-gidm, pupa of. 76 
Melauch roia. - 80 
Melanism................ 51,272 
in Cerurascitiscripta... 270.278 
in Certira scolopcndrina 272 
in Notodouta stragula 165 
in Phoosia dimidiata 159 
Melanotic Notodontiiins 51,159,165,272,276,278 
Metrua elongata, pujiuof 69, 70,71 
Micropteryx, mouth parts of. 58 
pupa libera of 62 
venation of 62 
Mimicry, protective 11,20 
Muller, F., on ontogenetic development of veins 84 
H., on origin of lepidoptera - 55 
^Natural selection 24 
inadequacy of 15 
Neraatoia viololluB, larva, figured 63 
Neolepidoptera 61,62 
^epticala, larval legs of 18 
Xoctuidm, origin of 81 
Xoctuobombyces 11 
Nola ovilla, pupa 79 
Nolidm, pupa 79 
Notodonta stragula, melanism in 165 
Notodontian fauna of North America 45 
larvae, grouping of, by their affinities 23 
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Notodontians, melanism in 51 
Notodontidm, systematic revision of 87 
NotodontinsB 30,140' 
CEccticua abbotii, pupaof. 69,70 
CEnotiis vircsccns, pupa 74 
Q2ta auren, larAm of 81 
pupa of 78, 89 
Oncopera iiitricata, pupa 74 
Origin of mimetic or protective characters 7, 11, 15 
Puloolepidoptera 01 
Panorpidm 14 
Paranal forks 26, 279 
Parasa chloris, pupa of 76 
Phjissua triangularis, pupa 74 
Pheosia dimidiata, melanism in 159 
Phryganidia califomica, pupaof 79 
Phyllocnistis, larva of 18 
Phylogenyof Lepidoptera....* 51 
Plate, surunal 25 
Platylepidoplera.. 62 
Platysamia cecropia, ontogeny of 40 
Prickles of plants, origin of 10, 17 
Primitive caterpillar 14 
Prionoxystus rohinim, i>upa 76 
Prodoxidfc 64 
Prodoxus deciplena, pui)a figured 64, 65 
Protolepidoidora 58 
Psychidte, pujm of 68, 70 
relations of 68, 79 
Pupa, genital armature of 74, 77, 78 
incoinpleta 53,56,79 
libera 63,56,62 
mouth parts of 53, 57, 62, 64, 65, 74 
obtccta 53,56,79 
venation of 54,85 
Pnpn?, Chapman on 52, 56 
Pupal characters, iuheritance of 33,35 
Pyga>rina3 - 39 
Kesemhlanco, protective 201, 202. 205, 206, 207, 215 
Saturuians, geographical distribution of 45 
origin of their thick bodies, etc 19 
Scbiziira concinna 30 
Seasonal variation 50 
Segregation 19 
Sesiidm, pupa of 77 
Sot®, classification of. 21 
origin of 7,11,16 
glandular 21,24,26 
Shield, cervical, origin of 25 
Signals, danger 180, 181, 215 
Simmtbis oxycantha, larvm figured 63 
Size, increase in, in 'Westeru compared with Eastern individ- 
uals 159,213 
Solenobia pinoti, pupa of. 67, 69 
wMsheUo, pupaof 68,69 
Sonoran subprovinco 45 
Specialized forms 42 
Sphinges, success of, in struggle for existence 82 
Sphingicampa bicolor, ontogeny of 38 
SpiloBoiiia virgiiiica, origin of markings of 15 
Spines, origin of. 7,11,16 
in brachiopods 17 
in trilobites 17 
Spots, development of 7, 11, 15 
Spuler, A., on pupal forms - 54 
venation 84 
Stemapoda 24,266,279 
Stem forms of Lepidoptera * 54 
Stenopterygia 63 
Speyer, A on origin of Lepidoptera 55 
Stimuli, external 22,24 
Suranal plate - 25 
Symiuerista albifrona, origin of lines of 15 
Syntomidro, pupa of 79 
Talffiporia conspurcatella, pupa of 67, 69 
