PLATE F. 



Fossil Tettigid^. (Pages 164 — 180.) 



Fig. 1. — Elytron of Pakeontina oolitica of Butler. 

 Drawn of the natural size. 



Fig. 2. — Wing of CicadelUum psocns, Westw. From 

 the English Purbeck beds. 



Fig. 3.^ — Elytron of CicadelUum dijisis, Westw. From 

 the same place. 



Fig. 4.- — Elytron of Cercopidium Signoreti, Westw. 



N.B. — Figures 2, 3, and 4 are enlarged from the 

 small engravings of Brodie. 



Fig. 5. — Upper side of Cicada emathion, Heer. From 

 the Swiss Miocene. 



Fig. 6. — Cercopium minutum, Heer. From the same 

 place. 



Fig. 7. — Cercopium morio, Heer. 



These last three figures are from Die Urwelt der 

 Sweiz. 



Fig. 8. — Body and elytra of Agallia ohstructa, Scudd. 

 The elytral venation is suggestive of our own modern 

 genus. 



Fig. 9.— Fossil remains of Petrol ijsfra gigantca, Scudd. 

 From the Oligocene of Colorado. The expanse of this 

 fine insect must have been more than 2^ inches. 



Fig. 10. — A nearly complete example, but wanting 

 the limbs, of Palcecphora maculata, Scudd. This insect 

 has dark irregular patches, instead of the bands which 

 mark our representative Triecphora ; the crescentic 

 black edgings of the recent species are here repre- 

 sented at the elytral tips. 



Fig. 11. — Fossil remains of Thammotettix gannetti, 

 Scudd. Probably the body of this insect has be^n 



