On the Geographical Dietribution of Insects, 227 



genera vary but little ; even the species are often identical at 

 the two opposite extremities. We find, for example, with very 

 few exceptions, the same Lepidoptera between the Volga and 

 the Oural, as in the vicinity of Paris.* The richest portions 

 of this region are Germany and Hungary ; it is these at least 

 which possess the greatest number of peculiar species. The 

 genera proper to this region are pretty numerous, as has been 

 seen by one of the preceding tables. 



Sdly, Siberia, comprised within the Oural Mountains on the 

 west ; the great Northern Ocean on the east ; the Polar Cir- 

 cle on the north ; and the Altai range on the south, which may 

 be considered as forming a part of it. In this country, which is 

 very little known in its entomological relations, except in the 

 neighbom-hood of Barnaoul on the Obi, a part of the Daoviria 

 of Kamstchatka, and of the Altai Mountains explored by Rus- 

 sian naturalists, the insects shew, in regard to genera, the 

 closest resemblance to those of the preceding region ; but the 

 species are, for the most part, entirely different. Here have 

 been collected, in particular, a great niunber of beautiful Ca- 

 rabi. 



4th, The Mediterranean Begion. — This includes the French 

 coast of the Mediterranean as far as 45', Spain, Italy as far 

 as the Alps, Turkey in Europe, Greece, the coasts of Asia 

 Minor, Sjria, and the shores of Africa, as far as about 30°. Its 

 entomology is one of the best characterized, and consists more 

 especially of Heteromera, almost unknown in the preceding 

 regions, such as Pimelia, Akis, Zophosis, Elenophorus, Scau- 

 rus, Mylabris, &c. ; a great number of hairy and cylindrical 

 Buprestes, of the genus Jalodes, and in the other families of 

 Coleoptera, Cebrio, Zygia, Onitis, Ateuchus, Amphicoma, 

 Scarites, Siagona, Ditomus, &c. The Cicadae and Mantes, 

 very rare in the European region, are common in this. It 

 possesses likewise a great number of fossorial Hymenoptera, 

 and its peculiar Lepidoptera belong particularly to Antho- 

 charis, Satyrus (genus Argus), and the genus Dorytis, pecu- 



* Sec Evcrsrnaun's EnumLmtio Lcpidopterorum fluvium Volgam inter et 

 montes Uralensc« habitanlium. Bulletin dc la Socii-'te Impehalc des Na- 

 luralifetes de Moscou. Tom. ill, X^'ii. 



