cockroach life cycle diagram, scheme

abdomen adult anatomy biology blattodea body bug cercus cockroach creature cycle diagram dimorphism education egg entomology exterminate foreleg graphic head hindleg illustration infestation infested insect label labeled life mesothorax metathorax midleg nature nocturnal nymph omnivorous ootheca pest pesticide prothorax scheme species stages steps structure taxonomy thermite thorax tropical vector zoology