1980] 
Aiello — Life History of Dysodia sica 
127 
Figures 11-14. 11. Head capsule of first instar. Scale = 0.125 mm. 12. Setal 
maps of first instar prothorax (P), meso- and metathorax (M), abdominal segment 
three (A-3), and first through final instar suranal plate (S). 13. Head capsule of 
final instar. Scale = 2 mm. 14. Setal maps of final instar prothorax, meso-and 
metathorax, abdominal segment three, and first through final instar abdominal 
segment nine (A-9). 
Later Instars 
Second through final instar larvae have black head and cervical 
shield. The body is white with black setae and spiracles. 
The arrangement of the head capsule setae is shown in Figure 13. 
Average head capsule widths for the five instars were 0.6 mm, 0.9 
mm, 1.4 mm, 2.1 mm, and 3.2 mm for the seven individuals reared 
from eggs (Lot 80-55). 
The arrangement of the body setae in second through final instar 
larvae (Figure 14) is much the same as that of instar one, with the 
following differences: the three thoracic segments have one less seta 
on the leg base; the meso- and metathorax have seta theta present 
(absent in instar one); on the abdominal segments, seta mu is present 
(absent in instar one); the pi group consists of two setae on abdominal 
segments 1 and 7, three setae on segments 2-6, and one seta on 
segments 8 and 9 (cf. instar one); seta epsilon (absent in instar one) is 
vestigial. 
