We are now considering Bed Bugs from the standpoint of their life-histories, and the individual life-story of an bed bug of which we possess but a few fragments of wings or body, entombed in a rock formed possibly before the period of the Coal Measures, can only be a matter of inference. Still it may safely be inferred that when the structure of these remains clearly indicates affinity to some existing order or family, the life-history of the extinct creature must have resembled, on the whole, that of its nearest living allies. And all the fossil Bed Bugs known can be either referred to existing orders, or shown to indicate definite relationship to some existing group.