92 



Abdomen 1, 2. V. dorsalis is the largest of the tuberciila; no 

 V. subdorsalis, v. suprastigmalis a little smaller than the other 

 verrucae, v. infrastigmalis lying a little further towards the tail 

 than usually. It may be that it has been derived from v. post- 

 stigmalis and v. infrastigmalis. Two s. basales close to each other 

 and sometimes blended. Generally no s. pedalis. 

 Segm. 3, 4, 5, 6 = 1. But v. suprastigmalis is larger and v. hasalis 

 bears four setae, next to each other. On the leg is a dark 

 spot and quite at the end is a seta pedalis. 

 „ 7, 8 = 1. But V. suprastigmalis is about as large as the 

 others, v. hasalis is well developed and there is a d. pedalis 

 with two or three setae. 

 „ 9 = 1. But V. suprastigmalis is not clearly defined and 

 generally bears only one long seta and two or three short ones. 

 V. hasalis has two setae which are sometimes separated. No 

 distinct segment 10. 

 Instar // and the following instars. 



All the tubercula are arranged as in instar / and grow into 

 scoli, but V. hasalis is dissolved into several setae, v. pedalis dis- 

 appears. Between the verrucae setae appear on the skin directly 

 after the first moulting. When the caterpillar is full-grown they 

 are ± '/i °^™* l^^g? (on the abdominal legs a little longer). The 

 setae on the verrucae are + 1 '/.^ mm., exceedingly thick and not 

 plumed. Therefore three scoli occur on each segment : sc. dors(dis, 

 sc. suprastigmalis, sc. infrastigmalis. Neither is the s. subdorsalis 

 of the prothorax any longer visible. 



A dark colour in the drawing of abdominal segment 5 (Plate III, 

 fig. 15) accurately shows the spots. They do not take their origin 

 from the primary verrucae. 



Recapitulation. The pattern hardly changes. The tubercula 

 are scoli. There is no sc. subdorsalis except a very much reduced 

 one on the prothorax. Probably it has also disappeared on the other 

 segments and for this I refer to the Hemileucidae. On the meso- 

 thorax and metathorax there is no sc. dorsolateralis. Sc. basalts 

 becomes dissolved later on. 



