373 



bright-ycllow linea dorsalis, bogiiiiiiug- botwecn the two prothoracic* 

 shields and onding near the anal sliiuld ; the skin is green. The 

 arrangement of the tubercula is as in instar J, but tlie setae are 

 much longer and bet ween the priniary ones numerous sniall, 

 secondary tubercuhi, each with one seta, have inserted themselves. 



The prothoracic shield has now four tubercula, one ventrad of 

 ö'. siibdorsalis has been added = s. subdorsalis in f. ? 



On the distal border is a row of red spots. On all the segments 

 the easily recognisable primary tubercula are round the edges 

 still a little red. Segment 11 is no longer to be seen distinctly. 



Instar III. Length 6 — 8 mm. Duration 4 — -5 days. 



Besides the characteristics of instar 77, we see a bright-yellow 

 linea stigmalis and niany small hairs between the primary ones 

 which remain distincÜy visible. Instead of the mono- and bisetose 

 tubercula basalia we find on the segments 3 — Q a row oü s. hasaJes, 

 curving over the beginning of the abdominal legs and over the 

 places where legs might have stood on the segments 1, 2, 7, 8. 



On the abdominal and anal legs there is a black spot covered 

 with short hairs, which spot might perhaps be taken as a highly 

 modified s. pedalis. 



Instar IV. Length 12 mm. Duration 5 days. 



The smaller setae have grown a great deal, especially one under 

 s. mibdorsalis of the abdominal segments. Between s. dorsalis and 

 s. suprastigmalis on one side and s. subdorsalts on the otlier 

 we see a new distinct row and also one spot caudal of .s. shJ)- 

 doi'salis. 



We can easily recognize the primary tubercula : .s-. dorsohde- 

 ralis of the prothorax for instance is doublé as in instar 7. 



They nearly all possess, however, a ring of smaller setae round 

 the larger ones. The stigmal line gets very broad. 



Instar F. Length 28 mm. (to 45 mm.) Duration 9 — ^14 days. 



The tubercula are very large and conical, they bear many 

 setae (= chalazae). 



The linea stigmalis is continued on the head as a white stripe. 

 The arrangement of newly arisen tubercula in vertical rows is 



34 



