In the field, intensity of invertebrate seed predation, largely exerted by ground beetles (Carabidae), varies with the course of the year. A factor contributing to this variation is the fluctuating temperature. In this study we investigated the effect of temperature on the rate of seed consumption in Pseudoophonus rufipes and Harpalus affinis, two abundant seed predators in agro-ecosystems. Ten males and females were put at six constant temperatutes and provided with surplus seed of dandelion (Taraxacum officinale), and their consumption was recorded during 4 consecutive days. Smaller H. affinis consumed less seeds (average 12.2 seeds d-1) than larger P. rufipes (29.0 seeds d-1), and within each species smaller males consumed significantly less seeds than larger females. However, in proportion to the number of seed eaten H. affinis consumed significantly more seeds per unit body mass than P. rufipes. In both species seed consumption increased with temperature and was 2.4-3.4 times greater at 30 than 10 °C. Using a linear relationship base temperature for seed consumption (0.4 °C in H. affinis and 6.5 °C in P. rufipes) and increment of seed consumption per 1 °C increase above this threshold (0.7 and 2.8 seeds individual-1 day-1, respectively) were calculated. These parameters enable to calculate average daily consumption of each species at temperatures below 20 °C while above this limit increasing consumption with temperature may be unaffected by temperature. Supported by the project No. VZ-0002700603 and QG 50107.