CONTENTS. 



I'age. 



I. Coloration and protective attitudes of the Notodontid;« 5 



II. Tlie larval armature of the Ceratocampinfe 10 



III. The eaudal horn of the Ceratocampidte 17 



IV. Protective armature both in shape and color and defensive movements 22 



V. Coloration in the larvae of the Ceratocampinje 22 



VI. Dichromatism or color variation in the larva 26 



VII. Life historj' of Ceratomia amyntor 30 



VIII. Phyloseny of the Ceratocampin^e 33 



IX. On the Phylogeny of the Sphingidie; their derivation from the Ceratocampidas 34 



X. Origin of the Syssphingina, and also the Symbombycina from the Notodontidte 40 



XI. Opisthenogenesis, or the development of segments, median tubercles, and markings a iergo 47 



XII. The superfamily Syssphingina 49 



XIII. Origin of the Syssphingina by both continuous and discontinuous evolution 50 



XIV. The geographical distribution of the Ceratocampinse 51 



XV. The f ore-tibial sjsur or epiphysis 53 



XVI. The nomenclature of the veins of the Lepidoptera 55 



XVII. Classification and life histories of the Ceratocampiuie 56 



3 



