SOUTH AFJIICAN BAGWORMS. 



645. 



seta (2), the lateral or supra-spiracular with one seta (3) and 

 exceptionally with a minute one (3a), in front of this, the 

 sublateral or subspiracular with two setie (4 and 5), the 

 SLibventral Avithout any setae, the outer leg-plate with a group 

 of two setee (7), and the ventral with one seta (8). The first 

 abdominal bears in addition to the plates mentioned a mid- 

 dorsal plate, which is unarmed. 



The prolegs on segments 3 to 6 bear nine to eleven, 

 (exceptionally twelve) booklets (tig. 4), the numbers on several 

 specimens examined being as follows : 



The spiracles are situated just below the supra-spiracular 

 plate and are small. On abd. 7 the plate corresponding to 

 the outer leg-plate bears only one seta. On abd. 8 the 

 dorsal and subdorsal plates are fused into one which extends 

 to the medial line and there meets the one from the other 

 side. The supra-spiracular and part of the subspiracular 

 (with one of its two setae) are also fused into one and this 

 is pierced by the spiracle, which is larger than those on the 

 other abdominal segments. The position and number of the 

 seta3 are the same as on the other segments, but here (and 

 also on ;ibd. 9), group 7 consists of one seta only. On abd. 9 

 the dorsal plate has extended mediad till it meets the one 

 from the other side, while apparently the subdorsal and 

 supra-spiracular plates have fused into one (thus bearing two- 



