CONTENTS. 



I. Coloration and protective attitudes of the Notodontida- 5 



II. Tlie larval armature of the Ceratocam jDinse 10 



III. The caudal liorn of the Ceratocampida; 17 



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



\'. Coloration in the larvae of the Ceratocampinse 22 



VI. Bichromatism or color variation in the larva 26 



VII. Life history of Ceratomia amyntor 30 



VIII. Phylo<;eny of the Ceratocampinaj -. 33 



IX. On the Phylogeny of the Sphingidae; their derivation from the Ceratocampidte 34 



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



XI. Opisthenogeuesis, 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 Ceratocampina? 51 



XV. The fore-tibial spur or epiphysis 53 



XVI. The nomenclature of the veins of the Lepidoptera 55 



XVII. Classification and life histories of the Ceratocampinje 56 



3 



