In the Lower Miocene of Croatia there is another rich deposit of insects, somewhat more tropical in character, comprising large white-ants and dragon-flies differently marked from any {167}now inhabiting Europe. A butterfly is also well preserved, with all the markings of the wings; and it seems to be a _Junonia_, a tropical genus, though it may be a _Vanessa_, which is European, but the fossil most resembles Indian species of _Junonia_. The Eocene formations seem to have produced no insect remains; but they occur again in the Upper Cretaceous at Aix-la-Chapelle, where two butterflies have been found, _Cyllo sepulta_ and _Satyrites Reynesii_, both belonging to the Satyridæ, and the former to a genus now spread over Africa, India, and Australia. A little earlier, in the Wealden formation of our own country, numerous insects have been found, principally dragon flies (_Libellula_, _Æshna_); aquatic Hemiptera (_Velia Hydrometra_); crickets, cockroaches, and cicadas, of familiar types. Further back in the Upper Oolite of Bavaria--which produced the wonderful long-tailed bird, _Archæopteryx_--insects of all orders have been found, including a moth referred to the existing genus _Sphinx_. In the Lower Oolite of Oxfordshire many fossil beetles have been found whose affinities are shown by their names:--_Buprestidium_, _Curculionidium_, _Blapsidium_, _Melolonthidium_, and _Prionidium_; a wing of a butterfly has also been found, allied to the Brassolidæ now confined to tropical America, and named _Palæontina oolitica_.