The famous Tertiary beds :at Florissant, Colorado, have yielded a considerable number, or remarkably well-preserved Tipulidae (in which family are included the most primitive of existing Diptera), as also species belonging to other families, such as Mycetophilidae and even, Oestridae.
Mayr and others, while Scudder has studied the rich Oligocene faunas of Colorado (Florissant) and Wyoming (Green River).
The Oligocene lake basin of Florissant, Colorado, has been reconstructed similarly by Samuel Hubbard Scudder and T.
In height - the Granite Canyon (11 m.) of the South Platte west of Florissant, and the fine gorge of the Rio de las Animas (1500 ft.), would be considered wonderful in any state less rich in still more marvellous scenery.
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