86 



visible. At about the time of the first moulting the vernicac dor- 

 sales of the abdominal segment 9 begin to stretch themselves, 

 and rise to the "caudal horn" which reminds us somewhat of 

 that of the Sphingidae. 



Prothorax. Verruca dorsalis large, with four or five setae; seta 

 subdorsalL^, v. suprastigmalis^ not distinctly confined, but there 

 are three to six setae placed together; v. prostigmaliis with three 

 setae, v, basalis with three setae, s. propedalis^ s. postpedalis, some 

 small setae on the leg, and s. ventralis. 



Mesothorax. V. dorsalis and v. dorsolateralis large, each with 



five or six setae, s. suprastigmalis^ v. prostigmalis with four setae, 



V. basalis with four setae. S. propedalis^ s. postpedalis, s. ventralis. 



Metathorax = mesothorax'^ but sometimes there is a median 



dorsal seta. 



Abdomen 1,2. Here too this medial dorsal seta is sometimes found. 



V. dorsalis large with four setae, s. subdorsalis, v. suprastig- 



inalis large with four setae, s. poststigmalis, s. infrastigmalis, 



V. basalis with four setae; two or three s. {pro- et 2^ost) pedales; 



8. ventralis. 



Segm. 3, 4, 5, 6 = 1 and 2, but v. propedaUs bears two setae, and 

 on the leg one finds at the front and the back edge two 

 pigmental spots with one or more small setae ; s. poststigmalis 

 bears very often two setae, but this is not a constant feature, 

 neither is it so on the successive segments of one individual. 

 „ 7, 8 = 1 and 2, but s. poststigmalis has often been doubled. 

 The newly-hatched larva directly bears a v. dorsalis on 

 segment 8, which is higher and larger than the other ver- 

 rucae. That it is a v. dorsalis appears from the s. sub- 

 dorsalis^ placed behind it. The two v. dorsales of the right 

 and left sides are united. When the length of the cater- 

 pillar is 4 mm. this verruca is 50 — 60 f/.. high. It soon 

 grows to the double height, whereas the length of the 

 caterpillar increases only very little. 



When the caterpillar is a fortnight old, it is about 6 mm. 

 long and the v. dorsales have already attained a height of 



