Damages to the grains by Callosobruchus maculatus (F.) on four varieties ofmungbean and five of soybean were assessed. One hundred grams of each type and variety of beans plus 20 adults ofC. maculatus were placed in a transparent plastic container. The paramateres measured were weevil density, percentage of damaged grains and percentage seed germination. In mungbean, the number of adult weevil was highest in variety MG 50-10A and lowest in V1968 (P< 0.05). Germination rate could not be assessed as beans were 100% damaged after 3 months of storage. Insoybean, weevil density increased by 20-215% in all varieties except Acadian. The percentage of damaged grain was low (<8%) for all varieties. The percentage of germination is significantly highest in variety Palmetto (P<0.05). (Compared to mungbean, soybean had a lower population increase, lower percentage damaged grain and higher percentage germination. Soybean can be stored for 3-5 months ivith minor infestation from this pest.