164 BRITISH CICAD.E. 



NOTES ON SOME OF THE FOSSIL TETTIGID^. 



Having described, however inadequately, the species 

 of Tettigidse now indigenous to Great Britain, it may 

 be of interest to treat of what is known of the 

 ancient species preserved in various rocks ; but for 

 this purpose it will be necessary to take into account 

 the fossil remains discovered not only in Europe, but 

 those rich materials which have been comparatively 

 recently brought to light by American geologists. 

 Assisted by generous money grants from the United 

 States government, several accomplished workers on 

 the geological surveys have enlarged our knowledge of 

 Entomology by enabling us to compare extinct with 

 recent forms of life. 



The bibliograjDhy of fossil insects, compiled by Mr. 

 Samuel H. Scudder, which runs 47 pages of close 

 print, testifies to the existing mass of literature on 

 this subject. Quite recently the same indefatigable 

 biologist has given to science his finely illustrated 

 volume on the ' Tertiary Insects of North America ; ' 

 this, aud Prof. Oswald Heer's ' Urwelt der Schweitz,' 

 will long remain text-books, and helps to show the 

 connection or separation of the European and American 

 fossil insect faunas. 



Prof. 0. Heer's work, though published in 1865, 

 will ahvays be read with interest, as recounting the 

 story of primaeval life. Its clear style, well rendered 

 into English by the late W. S. Dallas, with additional 

 notes and effective woodcut illustrations, besides plates, 

 will commend the volumes to both the scientific and 

 the general reader. 



In preparing the following notes on fossil Tettigidae, 

 I here express my indebtedness to the above important 



