9 
From the Eocene of Italy Massalongo ^Nereid. foss. 1855 p. 32 
and Stud, paleont. 1856 p. 14—21) has described the following insects 
from middle Eocene, Monte Bolca: 
Forficula bolcensis Mass. 
Termes peccanæ Mass. 
Perotis lævigata Mass. 
Cordulia Scheuchzeri Mass. 
Bibio Sereri Mass. 
Dipterites angelinii Mass. 
and Omboni (Atti. R. Istr. Venet. (6) IV 1886 p. 1430) records Perotis 
lævigata Mass, and a Hydrophilus from the same locality, and 
further a Car abus nova len sis Omb. from middle Eocene i Novale. 
Whilst the above mentioned finds of Eocene insects in Europe 
are scanty and partly undetermined and indeterminable, the fauna from 
the Eocene of Rocky Mountains in U. S. A. is much more richly 
represented, all its species originating from Green River series in Colo¬ 
rado, Wyoming, and Utah, especially from the localities of Green 
River, White River, and Roan Mountain. The recent American and 
European insect faunæ as well known mutually differ so much that 
American animals and their descriptions cannot serve for determinat¬ 
ing purposes to European species. The same difference did evidently 
also exist during the Tertiary period. That the faunæ from both 
sides of the Atlantic Ocean also then were extremely different is 
proved by the present literature, and the author’s investigations like¬ 
wise confirm that the American fauna at most once in a while may 
give a hint as to some genus, but never as to species. It, therefore, 
is of no special consequence, when a European fauna is concerned, 
to give a list of all species known from the Eocene of Rocky Moun¬ 
tains, and in the following I shall only give a list of the papers in 
which insects from American Eocene have been described: 
Samuel H. Scudder: The Tertiary Insects of North America. 
Washington 1890 pp. 663, 28 plates. 
Scudder: Tertiary Rhynchophorous Coleoptera of the United 
States. Washington 1893. 
Scudder: Adephagous and Clavicorn Coleoptera from the Terti¬ 
ary deposits at Florissant Colorado with descriptions of a few other 
forms. Wash. 1900. 
T. D. A. Cockerell: A new fly (Fam. Mycetophilidæ) from the 
Green River beds. Amer. Journ. of Sei. (4) XXIII 1907 p. 285. 
Cockerell: Descriptions of Tertiary Insects I—-VII. Amer. Journ. 
of Sei. (4) XXV—XXVIII 1908—09. 
. 
