286 



MEMOIES OF THE NATIOXAL ACADEMY OF SCIENCES. 



Horns of catorpi liars, origin of their iioaition 22 



Iloru, caudal 21, 20 



Humps, origin of 20 



Ilypbautria tester, orif^in of markings of 16 



Ichneumons, features deterrent to 170 



Ichthyurina' ^5 



Imaginal rhiiracters, iuheritance of 33,34 



Incongruence between larval and ndult characters of Xotodon- 



t ians 27, 20 



Inheritance at corresponding periods of life 8,38 



Insects, metaraorphic. genealogy of 56 



why so numerous in ajieciee and individuals 19 



Isolation 19 



Jugatce 57 



Laraarckism 20. 24 



Lamina supraanalis 25 



Larva, campndea form 13 



cruciform 13 



generalized 8, 9 



primitive 14 



Larval characters 7 



inheritance of 33, 35 



l^asiocampido?, geographical distribution of 45 



Leaf, dead or brown portion of, protective resemblance of Xoto- 



dontian larva; to 201,202.205.207 



Lepidajjtera, elassitication of 51, 56 



genealogical tree of 83 



haustellata 61 



iuheritance of acquired characters in 33,36 



laciniata 58,61 



phylogeny of 51,56 



primitive features of 53. 58 



stem forms of 54, 55 



venation of 84 



Limacodcs, origin of their larval forms 19 



Lines, origin of 15 



Lithacodia fasciola, ontogeny of 44 



Lithosia, the ancestor of Bombyces 32 



Lobe, infraanal 26 



Macrurocampa, flagellum 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 



Maxillic, vestigial 34 



Medium, direct action of 16 



Megalopyge, pupa of 76 



MegalopygidiT, pupa of 76 



Melanchroia 80 



Melanism 51,272 



in Cerurascitiscripta 276, 278 



in Cerura scolopendrina 272 



in Notodonta stragula 165 



in Pheosia dimidiata 159 



Melanotic Notodontians 51, 159, 165. 272, 276, 278 



Metrua elongata. pupa of 69, 70, 71 



Micropteryx, mouth parts of 58 



pupa libera of 62 



venation of 62 



Mimicry, protective 11,20 



Miiller, F., on ontogenetic development of veins 84 



H., on origin of lepidoptera 55 



Natural selection 24 



inadequacy of 15 



Nematoi.s violellus, larva, figured 63 



Neolepidoptera 61,62 



Kepticula, larval legs of 18 



KoctuidiD, origin of 81 



Koctuobombyces 11 



Xola ovjUa, pupa 79 



Nolida*, i)up:i 79 



Kotodonta stragula, melanism in 165 



Notodontian fauna of North America 45 



larva', grouping of, by their affinities 23 



Page. 



Nittoilontians, mclauisni in 51 



Notodnntida', systematic revision of 87 



Xolodontina? 30,140 



tEciticus abbot ii. pupa of 69, 70 



(Euotus virescens, pupa , 74 



CEla aurea, larva of 81 



pupa of 78. 80 



Oncopera intricata, pupa 74 



Origin (>rniiinctic or protective cbanicters 7, 11,15 



I'alc<tU-i»idoptera 61 



Panorpidie 14 



Paraiial forks ..., 20.279 



Parasa chloris, pupa of 76 



IMiassus triangularis, pupa 74 



Pheosia dimidiata, melanism in 159 



Phryganidia californica. pupa of 79 



Pliyllocnistis, larva of 18 



Phylogeny of Lepidoptera 51 



Plate, suranal 25 



Platy lepidoptera 62 



Platysamia cecropia, ontogeny of 40 



Prickles of plants, origin of 16.17 



Primitive caterpillar 14 



Prionoxyatus robinin^, pupa 76 



Prodoxida* 64 



Prodoxus decipiens. pupa figured 64, 65 



Protolc])idoptera 58 



Psychida^, pupa of 68.70 



relat ions of 68, 70 



Pupa, genital armature of 74, 77, 78 



inconipleta 53, 56. 79 



libera 53, 56, 62 



mouth parts of 53, 57. 62, 64, 65, 74 



obtfcta 53, 56, 79 



venation of 54,85 



Pupaj, Chapman on 52, 56 



Pupal characters, inheritance of 33, 35 



Pygaerinre 30 



Eesemblance, protective 201.202.205.206.207,215 



Saturuians, geographical distribution of 45 



origin of their thick bodies, etc 19 



Schizuraconcinna 30 



Seasonal variation 50 



Segregation 19 



Sesiida;, pupa of 77 



Setae, classification of 21 



origin of ^. 7,11,16 



glandular 21,24,26 



Shield, cervical, origin of 25 



Signals, danger 180,181,215 



Simjetbis osycantha, larva figured 63 



Size, imrease in, in Western compared with Eastern individ- 

 uals 159,213 



Solenobia pineti, pupa of 67. 69 



walshella, pupa of 68, 69 



Sonoran subprovince 45 



Specialized forms 42 



Sphinges, success of, in struggle for existence 82 



Spbingicampa bicolor, ontogeny of 38 



Spilo,sonia virginiea, origin of markings of 15 



Spines, origin of 7, 11, 16 



in brachiojjods 17 



in trilobitca 17 



Spots, development of 7, 11, 15 



Spuler, A., on pupal forms 54 



venation 84 



Stemapoda 24.266,279 



Stem forms of Lepidoptera 54 



Stenoptcrygia 63 



Speyer, A .. on origin of Lepidoptera 55 



Stimuli, external 22,24 



Suranal i)lato 25 



Syinmerista nlbifrona, origin of lines of 15 



Syntomidic, pupa of "^^ 



Talasporla conspurcatella, pupa of 67, 69 



