390 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 10, 



a flattened lateral margin, and as many as eighteen very fine longitu- 

 dinal plain striae ; it may have belonged to a Helopideous or Diape- 

 rideous beetle. Figs. 10, 12, 17, 30, & 33 deserve notice on account 

 of the deep punctures or other rugosities which are still retained 

 in the specimens; tigs. 10 & 30 may be Carabideous, and fig. 33, 

 Curculionideous. Fig. 19 is a fragment of a very fine elytron, re- 

 markable for having the deep lateral impression similar to that of 

 the elytra vi'hich are so common in the Stonesfield Slate, upon the 

 relations of which I commented in Mr. Brodie's work, p. 122. The 

 other elytra do not appear to merit any particular mention. 



Wings. — The remains of insect-wings likewise constitute a very 

 large portion of the series of Mr. P. B. Brodie's specimens. Of 

 these the finest and largest are the remains of wings of Dragoivflies, 

 of which there are thirty-four fragments. In no instance is there a 

 perfect wing. 



In the arrangement of the veins, especially those of the character- 

 istic triangle, they agree with that in PI. XV. fig. 5. In one spe- 

 cimen, however, the outer side of the triangle, instead of being 

 vertical, or nearly so, as in that figure, is very oblique, so that the 

 outer angle is very acute, as in JEschna (Quart. Journ. Geol. Soc. 

 vol. V. pi. II. fig. B). There is also considerable difference in the 

 size of the cells of the wings ; in some specimens these are very small, 

 whilst in one they are very large and quadrangular : this specimen 

 must, I apprehend, have belonged to a very large species of jffrioti. 



Other Neuropterous wings occur also, but always fragmentary. 

 PI. XVIII. fig. 24 represents a wing of an insect allied to Sialis ; to 

 which also figs. 35 & 37 may be allied. Figs. 25, 28, 31 are pro- 

 bablv portions of wings of insects allied to Thryganea. Figs. 22, 23, 

 26, 32, 33, 34, 38, 40, 41, 42, & 43 appear to be Orthopterous ; 

 some of them, as figs. 22, 32, & 43 (of which there are a great number 

 of specimens), being probably the vsing-covers of BlattidcB ; as well 

 as figs. 23, 26, & 33. Fig. 21 is a wing of a gigantic species of Ant, 

 closely allied to, but differing from, fig. 8 of PI. XIV. in the position 

 of the cells. 



PI. XVIII. figs. 27 & 30 appear to be portions of the hind-wings 

 of some species of Butterfly ; still they have very much of a 

 vegetable aspect. The surface is covered with minute punctures, 

 which may be the cells for the insertion of the quills of the coloured 

 scales which are all removed, supposing the specimens to be Lepi- 

 dopterous. If such should prove to be really the case, by the 

 discovery of more characteristic specimens, it will form an inter- 

 esting addition to our knowledge of fossil entomology. M. Boisdu- 

 val has, however, described, in the Annales de la Societe Entomolo- 

 gique de France, a fossil Butterfly under the name of Cyllo sejndta, 

 which has given rise to a remarkable controversy between himself 

 and M. Alex. Lefebvre, published in the same work. 



PI. XVIII. figs. 4 & 29 may possibly be the wing-covers of Cinii- 

 cideous insects much abraded. Figs. 3, 5, 36, and PI. XV. fig. 3, 

 are portions of the wing-covers and wings of Cercopideous insects. 

 PI. XVIII. fig. 20 is the wing of a Tipulideous hisect. 



