68 



setae between the primary warts and setae has increased. More- 

 over there occur some scattered setae. The setae on the primary 

 tubercula are ± 1 — I'/a mm. long. The longest which are at the 

 same time the biggest, are found on the prothoracic shield and 

 on the anal shield. 



Prothorax. On the prothoracic shield three setae, which in my 

 opinion represent s. dorsaUs, s. dorsolaterals and behind it a small 

 one = s. subdorsalis. V. suprastigmalis has three setae just as v.pro- 

 Htif/malis. The seta behind v. suprastigmalis is also plumed. V. basalts 

 with three setae. The small setae on the leg are not feathered. 



Mesothorax and metathorax. On the front-edge of the segment 

 a double row of spots, on the hind edge one row. 



V. dorsnlis has three setae, v. dorsolateralis just as v. suprastig- 

 malis has two. There is a single seta j>'f'ostigmalis. One large 

 V. basalis and many small setae which, however, are not fixed on 

 black tubercula. 



Abdomen 1 — 10 as in instar /, but: 



Seta infrastigmalis is single. Three setae, which are not united 

 and not implanted on a tuberculum, stand instead of v. poststig- 

 malis. The number of ,s. basales amounts to +10. 



Instar IV, Length ± 25 mm. 



Apparently this instar completely resembles the full-grown form. 

 Small setae, not plumed, are to be found everywhere. The spots 

 have become more numerous and bear setae of ± 1 mm. long. 

 Still more than in instar /// they are arranged in horizontal and 

 vertical rows and thereby give the impression of forming stripes. 



The primary tubercula may be recognised by the seta which 

 are longer (mostly 1 '/2 mm.), and generally thicker too. They 

 have short plumes. On each wart there are more setae than be- 

 fore, which is rather striking as during instar /, // and /// 

 the number is almost constant. 



As examples of the most intricate pattern of spots I chose 

 the prothorax and abd. 5, the others agree with these mu- 

 tatis mutandis. 



