i 



1S79.] 27 



The Neuroptera are represented by Panorpidce (JBittacus, Panorpa, 

 and Orthophlehid), SlaJid(P, LiheUulidce {^sclina and LiheUula), and 

 TermitidcB ; and tlie Orthoftera by a few Gryllidce, and several species 

 of BJattidee. 



Of the Hemiptera about fourteen species have been determined, 

 which have been referred to the families TingidcB, Lj/gceidce, Gerridce, 

 SydrometridcB, Cicadidce, Flatidce {Hicania), CixiidcB {^Delphax, Asiraca, 

 and Cixius), Cercopidae, and Aphides. 



Remains of the Diptera are more numerous than in any earlier 

 formations, no less than thirteen species having been determined, 

 which have been referred to the following families : — 3Iuscidce, Tipu- 

 lidcB, Empidce, BihionidcB {Bihio and Simtdidium), Mycetophilidce, 

 ChironomidcB, and CuJicidce. 



Prof. Westwood* states that, with a few exceptions, there is a very 

 general conformity between the insects from the Dorsetshire Purbecks, 

 and those from the Purbecks of Wilts and Bucks. There must, how- 

 ever, have been a considerable difference in the mode of deposition of 

 the strata of the two districts ; in no other way can we account for 

 the remarkable contrast presented by the state of preservation of the 

 insects from the Wilstshii'e Purbecks with that of those from Dorset- 

 shire. The remains obtained from the former are generally in a fair 

 state of preservation, while those from Dorsetshire consist nearly 

 always of mere fragments of wings, elytra, and bodies. 



Continental Europe. 



Upper Oolite. 



(SoIejiJioJen Slate). 



The only formation of this division of the Jurassic Period, on the 



Continent, in which fossil insects have been obtained in any numbers, 



is the well known Solenhofen Slate of Bavaria, celebrated for the great 



number and variety of the fossils discovered in it. 



Several hundreds of fossil insects have been obtained from this 

 slate, many of which are preserved in the Academy of Munich, and in 

 the Teyler Museum at Haarlem. 



Por our knowledge of these fossils we are indebted principally to 

 Prof. Grermar,t Count Miinster,J Dr. Griebel,§ Dr. Hagen,|| Herr H. 

 Weyenbergh, Junr.,^ and Dr. Winkler,** who have described or 



* Quar. Journ. Geol. Soc, vol. x, p. 392, 1854. 

 t " Nova Acta," Acad. Nat. Cur., T. xix, pp. 189—222. 1839. 

 i "Beitrage zu Geog. und Petrefactenkuud," T. v. 1841. 

 § " Fauna der Vorwelt," vol. ii, antea cit. 



II " Pal^ontogi-aphica," vol. x, pp 96—145, 1861—1863 : and vol. xv, pp. 57—96, 1865—1868. 

 TT " Archives du Mus^e Teyler," vol. ii, pp. 247 — 294, 1869 ; and vol. iii, pp. 234-240. 

 ** " Catalogue Syst(5matiquc de la Collection Pal6outologique du MusiSe Teyler." (Deuxi&me 

 Supplement;. Haarlem : 1876. 



