Can. Ent. 116: 785-793 (1984) Long term daily feeding in individual adult males and females of Periplaneta americana (L.) was quantified using a standardized diet. There was considerable variation among days, probably related to digestive processes with a period greater than 1 day. Female feeding was correlated with the reproductive cycle, most feeding occurring during the first few days after depositing an ootheca. Females differed with respect to the length of their reproductive cycles, and the amount of food that was accumulated prior to producing an ootheca. Females with high feeding rates produced oothecae at a faster rate, but they were less efficient at converting food into oothecal biomass than females that ate more slowly. A decrease in temperature from 25°C to 20°C more than doubled the length of the reproductive cycle, but the amount of food accumulated during inter-ovipositional intervals and the size of the oothecae were not affected. ResumeL'activitC alimentaire journalibre a long terme d'individus miles et femelles de Periplaneta americana (L.) a Ct C quantifiCe en utilisant un rCgime standard. Une grande variation entre jours a Ct C observCe, probablement en relation avec les processus digestifs ayant une pkriodicitk plus grande qu'un jour. L'alimentation des femelles Ctait correlee au cycle reproducteur, la prise maximale Ctant enregistrke au cours des quelques jours suivant la dCposition d'une ovothbque. Les femelles se sont montrtes differentes quant B la longueur de leurs cycles reproducteurs et a la quantitC de nourriture prise avant la production d'une ovothbque. Les femelles montrant une prise de nourriture ClevCe ont produit des ovothbques plus frkquemment, mais elles Ctaient moins efficaces a convertir leur nourriture en biomass d'ovothbque que les femelles consommant plus lentement. Une baisse de tempCrature de 25" a 20°C a plus que doublC la duke du cycle reproducteur, mais la quantitC de nourriture accumulCe au cours des intervalles inter-pontes et la taille des ovothbques n'ont pas Ct C affectCes.