8 A COMPARISON OF THE FOSSIL INSECTS 



The rernainins: families which do not belons; to the Odo- 

 nata have hitherto met with few representatives in England 

 as in Solenhofen. In the Termites there occurs in England 

 the smallest species yet known (Brodie, PI. 2, fig. 6), in 

 Solenhofen the largest, with an expanse of wings of two 

 inches, and one species of medium size. 



Fossil Perlid(S are not found in either Fauna. Some 

 specimens from Solenhofen I consider as Ephemer^a ; they 

 should belong to about four species. The form and nenra- 

 tion of the wings is, however, extraordinarily different from 

 existing species, yet they seem to come nearest to the true 

 genus Ephemera. In oiie species we meet with the remark- 

 able fact that the posterior wings are as large as the anterior, 

 a similarity nowhere found in existing species. 



Of the families which belong to Neuroptera (more re- 

 strictedly viewed) the PanorpidcB have not yet been found 

 in either Fauna. The Hemerohidce are only represented in 

 the Solenhofen Fauna by several specimens, referable to 

 three species. A very large Apochrysa (it should not be 

 overlooked that the remains of some Hemerohius wings 

 found in England (Brodie, PI. 6, fig. 22) should also be 

 referred to Apochrysa), a Chrysopa, and lastly a very well 

 preserved Nymphes, a genus now peculiarly Australian. 



In the family SialidoBj the Solenhofen Fauna possesses 

 specimens of a CorydaUs, and in England also a well- 

 preserved anterior wing of a Corydalis has been found. I 

 have seen the original at the British Museum : it is in ex- 

 traordinarily good preservation. (I believe it has been 

 figured by Mantell, but I know not where.) The English 

 species is of the same size with that from Solenhofen ; they 

 have however not been sufficiently examined to establish 

 their diff'erence. To the best of my recollection the neura- 

 tion of the English species is very similar to that of existing 

 species. 



