Please refer also to the following link for details on this group:
Mordellidae = Link 1
Certain species of Mordellidae have been reported predaceous on larvae of stem- and wood-boring insects, even though there is some disagreement among researchers (Clausen 1940/62). Hill (1922) found larvae of Mordellistena erythroderes Hill in termite nests. He asserted that they are predaceous on these insects. Clausen (1940) citing Balduf, noted that the form of the larvae in this family is not one which would be adapted to an aggressive life style, such as a predator, however.