In Cowpea plant vegetables, the average densily of species Assassin bug Comnus fuscipennis were as 12.19 + or - 0.03 and 0.20 + or - 0.04 individual/m2 in medium and late growing and bwer than the average density in early crop (0.15 + or - 0.02 individual/m2). However, in bean String bean, the average density in earty and late growings were as 0.16 + or - 0.06 and 0.12 + or - 0.04 individual/m2 and they were lower than it was in medium crop growing (0.18 + or - 0.08 individual/m2). Assassin bug Comnus fuscipennis played to be a certain role in fimiting the population densities of insect pests of Hedylepfa indicafa and Maruca vitrata.