Fig. 1, Kunkel (1966)
Figure 1.  The effect of controlled food availability on the synchrony of moulting in colonies of the German cockroach, Blattella germanica. Each colony (A, B, C, and O) of 35 to 40 larvae hatched from a single ootheca.  Adults of colonies A, B, and C were outbred as indicated for maximum viability. The production and subsequent hatching of oothecae are indicated for the first ovipositional period only.