INSECTA. 407 



referred to the recent genus Gryllacris (A. H. Swinton). 



One of the latter viz., Gryllacris (Corydalis) Brongniarti 



exhibits traces of a stridulating organ or 



"file," similar to that of the males of the 



living Crickets. The order of the Coleoptera 



(Beetles) is sparingly represented by forms of 



uncertain affinities (Curculioides and Troxites). 



Lastly, the great order of the Lepidoptera 



(Moths and Butterflies) is dubiously repre- 



sented by a wing from the Coal-measures Flg 258 _ ArcM . 



of Belgium, which has been regarded as be- wZacris 



(after Dawson). 



longing to a moth of the family Saturniidce, From the carbon- 

 and has been described under the name of 



Breyeria Borinensis (Preudhomme de Borre). 1 



No representatives of the Hemiptera, Diptera, or Hymenoptera 



have yet been detected in the Carboniferous rocks. 



In the Permian deposits few remains of insects have been 

 yet discovered. The Eugereon of Dr Dohrn, however, is a 

 remarkable Neuropterous insect from the Lower Permian of 

 Birkenfeld. 



Coming to the Secondary period, we are as yet very par- 

 tially acquainted with the characters of the Insect-fauna of 

 the Trias ; but an abundant insect-life is already known to 

 have existed in the Jurassic period. Even in deposits as 

 old as the Lias, we find Beetles of such well-known exist- 

 ing types as the Curculionidce, Elateridce, and Melolonthidce ; 

 while the Orthoptera are represented by Grasshoppers and 

 Cockroaches, and the Neuroptera by Dragon-flies and May- 

 flies. In the higher portion of the Jurassic series, in ad- 

 dition to various types of the Coleoptera, Orthoptera, and 

 Neuroptera, we appear to have a true representative of the 

 Butterflies. This is the Palceontina Oolitica of the Stones- 

 field Slate (Lower Oolites), which is regarded by Mr Butler 

 as intermediate between the existing groups of the Nym- 

 phalince and Satyrince, and as allied to certain tropical 

 American genera (Brassolis). In the Cretaceous deposits, 

 as might have been expected from their being so largely 



1 According to the high authority of Mr R. M'Lachlan, Breyeria is one of 

 the Pseudoneuroptera, and belongs to the Epliemeridce. 



