Coccinellidae prey on several taxa of homopterans, including aphids, whiteflies, mealy bugs and scales. However, reliable assessments of levels of predation are lacking for many homopteran pests. For example, relatively few studies have investigated feeding behaviors of Coccinellidae under field conditions using gut-content or analytical analyses. In this presentation, we review studies that have quantified levels of predation and discuss areas of focus for future research. Two case studies will be discussed to highlight the importance of documenting levels of pest mortality due to Coccinellidae: incorporating lady beetle predation into economic thresholds for management of the cotton aphid, Aphis gossypii, and the role of lady beetle predation of the soybean aphid, Aphis glycines.