Mathew Dilke is another Incredible Shrinking Man, initiating a new series and about to crawl up the big screen. The live experiment in a pilot program combating overpopulation, he's miniaturized to a half inch and lives in the bottom of a garden where he contends with the scuttling terrors of ants and aphids. But then, proceeding from fantasy to intelligence, he's sent on a mission to handle another kind of bug -- in fact install one on the head of a Rumanian in a literal hair's breadth coup. . . . The comparison to James Bond which has been made should also be reduced to equal size, but watch closely for the detail, microdotted with precision.