Pest Management Fact Sheet #5029 James F. Dill, Pest Management Specialist Clay A. Kirby, Insect Diagnostician For information about UMaine Extension programs and resources, visit extension.umaine.edu. Find more of our publications and books at extension.umaine.edu/publications/. Description & Biology Millipedes usually go unnoticed in the summer because of their nocturnal habits and tendency to disperse.