The oviposition pattern of C. bullita varied among the different host plants. For example, on O. kilmandscharicum, eggs were partially inserted obliquely into the stems or shoots, more often in groups than singly (Sharga 1953); whereas on Mentha sp., they were laid near the margin of the leaf (Samuel 1939). On O. basilicum, the eggs were deposited on the leaves and young branches singly or in clusters (Tigvattnanont 1989). Cochlochila bullita oviposited in young branches and leaves of O. stamineus. The eggs were inserted into the branches in clusters (Fig. 5) or singly into the veins of the leaf, leaving the operculum exposed (Fig. 6). The egg, 0.04 mm long, is oblong and dark brown (Fig. 7). Eggs hatched in 57 days and nymphal stages (instars I-V) lasted for about 10 days. Figure 8 shows the five nymphal instars of C. bullita. The adults lived for about 40 days.