355 



Segni. 8. On tlio place of the s. dormles of tlio left and right 

 sides, we find the niedian caudal horn which is white directly 

 after the birth and gets black later on. The skin lias totally 

 changed on this spot and is covered with nunierous, irre- 

 gnlarly placed small setae. 



I do not think that the candal horn has exclnsively been 

 developed from the two -s. dorsales^ which are distinctly 

 to be seen on the top, as two knobs each with a seta, 

 but I am inclined to consider it as a protuberance which 

 has lifted iip the s. dorsales on its top. 



Besides the horn we find in the usual order : s. suh- 

 dorsalis^ s. suprastigmalis^ s. prostigmalis^ s. infrastigmalis^ 

 s. basalis, and s. propedaUs. 

 „ 9 = 1, But s. infrastigmalis is absent, there is only one 



8. hasalis and one s. proped(dis. 

 „ 10. aS'. dorsalis, s. suhdorsaUs and s. suprastigm(dis on the 

 anal-flap ; there is a s. pyostigmalis^ s. infrastigmalis is 

 absent, one s. pedalis. 

 „ 11. Just under the anal-flap a large tuberculum with setae. 

 The seta under it we might take as s. hasalis of segment 10, 

 but in connection with the reduced number of setae of 

 segment 9, this does not seem probable to me. I consider this 

 tuberculum to belong to the ventral part of 11. 

 Instar II and the foUowing instars. 



The primary tubercula and setae have disappeared. The skin 

 is totally covered with small tubercula placed in vertical rows, 

 each of which has a very short seta, 



Recapitulation. Instar 7 has a primitive setal-pattern, which 

 is nearly the same as that of the other families. The caudal horn 

 has arisen on the place of the left and right setae dorsales which 

 remain visible on the top. With some exceptions (meso- and meta- 

 thorax) which it is easy to explain, the tubercula bear one seta. 



There is no s. poststigmalis, but we find on the abdominal 

 segment a s. prostlginalis. In instar II this pattern is lost and 



