268 



INSECTA. 



FIG. 179. Wing of ^Eshna grandisi 



structure of JEsTina liassina of the natural size; fig. 179, that 

 of the recent ^Eskna 

 grandis, and fig. 180, 

 Libellula depressa. 

 The dimensions of the 

 fossil are about one- 

 third greater than 

 those of ^E. grandis, 

 the largest of our British species ; its length being 2 inches 

 10i lines, and its greatest 

 breadth 8 lines. 



^Eshna JBrodei, was found in 

 the upper lias of Dumbleton, 



in Gloucestershire.* riG - ISO. Wing of Lib.aiula depressa. 



The Rev. P. B. Brodief found, in the same beds, an 

 unique specimen of Heterophlebia, with the head, thorax, 

 and half of the abdomen, and with the four wings expanded, 

 and beautifully preserved. In the Stonesfield slate is found a 

 portion of a wing of a large Hemerobo'ides. The lithographic 

 schists of Solenhofen have yielded 

 many specimens of large Neuroptera, 

 which have been described by Count 

 Minister. The lacustrine tertiary 

 strata of France contain tubes that 

 have been attributed to the larvae of 

 Phryganiae (caddis-worm) (fig. 181). 



Berendt found genera belonging to the Termites, EPHE- 

 MEEID^; (May-flies), and PiiEYaAKiDJE, in the yellow amber 

 of Prussia. 



Order ORTHOPTERA (Grasshoppers). Have the anterior 

 wings modified into thin elytra ; inferior in their develop- 

 ment, however, to those of beetles. The two posterior 

 pair are membranous, and when in a state of repose, are 

 folded longitudinally. The mouth is armed with mandibles 

 and maxillae formed for mastication. The tegumentary 

 skeleton is moderately solid. The feet are strong and 

 well developed. 



Count Minister found Cridites and Blatlina in the car- 

 boniferous stage of Germany. 



* Proceedings of the Geological Society, 1843. 

 f 1 Geological Journal, vol. v. p. 31. 



FIG. 181. Caddis-\vorm. 



