PLATE F.— continued. 



compressed. The wing-nervures are very similar to 

 those of our modern genus. 



Fig. 12. — Fragmentary parts of Dmvsonites veter, 

 Scudd. One elytron is perfect. The venation to a 

 certain extent recalls that of Athysamis, but the limbus 

 is wanting. A trace of brown colouring matter still 

 remains in the matrix. 



Fig. 13. — Apex of an elytron of Stenecpliora imnctulata, 

 Scudd. The membrane seems to have been stippled, 

 or covered with dots. 



My figures from 8 to 13, inclusive, are copied from 

 illustrations in some one or other of Mr. Scudder's 

 memoirs. The last three insects are from the tertiary 

 beds of British Columbia. The other insects are from 

 Colorado. 



