6 ARKIV FÖR ZOOLOGI. BAND 5. N:0 12. 



pairs are conspicuous through their great length, projecting 

 backwards to a level with the middle of the 2^^ and 3^^ 

 abdominal segments resp. 



The abdominal segments. 



The lateral processes of the 1—9**^ segments have one 

 pair of terminal hairs each; these are perfectly horizontal, 

 nearly as long as the width of the segments, very finely 

 pointed and curved in an even curve backwards; the 9*^ seg- 

 ment has a pair of similar but longer hairs at the posterior 

 angles. 



Textfig. 2. ist larval stage. Dorsai view. X 120. 



These hairs, which project very close to the surface, on 

 which the larva marches along, or even touch it, are probably 

 of some use at the locomotion. 



The glandalar hairs are present in the number of 3 pairs 

 on each of the 1 — 8 segments, viz. one pair, which is Jarge, 

 browncoloured and comparatively more developed in this stage 



