17 
Megalomus sp. 
Besides the two above named finds an impression of one more 
Megalomus has been procured, an impression of a whole insect with 
its wings and in lateral position. 
Fig. 6. Megalomus sp. 
For want of sufficient characters, especially the venation of the 
wings, the material does not allow any determination beyond the 
statement that it has to do with a Megalomus. Length of the insect 
measured from tip of front to apex of wing 11 mm. 
1 specimen. Silstrup Bakke (poss. Min. Museum). 
Coleoptera. 
Cassida sp. 
Not only in the recent time but also in earlier geological periods 
the beetles have held their own as the insect group showing the 
greatest number of species. Of the known Tertiary insects more than 
one third are beetles. It is, therefore, astonishing that only a single 
of the Diatom-earth finds is represented by a beetle. According to 
its habitual appearance, especially the broad limbus on the elytra, 
this individual (consisting of Prothorax and elytra connected) must 
be a Cassida. 
From Oligocène and Miocene deposits a small number of Cas¬ 
sida species has been described, further several finds not referred 
to species are known from these deposits. On the other hand, no 
Cassida is known from Eocene deposits, the individual at hand thus 
certainly must represent a new species. The elytra are, however, seen 
from the inside, and neither elytra nor prothorax displays characters 
sufficient for the characterization of a species. The length of the 
insect is 5 mm, its breadth 3.4 mm. 
1 specimen, found as erratic block at Struer (poss. Min. Museum). 
Danmarks geologiske Undersøgelse. IL R. Nr. 37. 2 
