Fresli-water Formiitions of Aix, in Proveiue. 295 



in their power to institute a more full and accurate comparison 

 between them and the local species. 



In the accompanying figures, one insect is represented upon 

 marlstone, to shew the nature of the subject ; and the lines be- 

 neath each denote the natural size of the insects, all of them 

 being magnified, to exhibit more distinctly the minuter parts, 

 and the nerves of the wings. 



I shall now proceed to arrange and enumerate the specimens, 

 with occasional remarks for illustration. 



Order COLEOPTERA. 



Fam. Carabid.e. 



1. Harpalus, with jninctured elytra, perhaps an Ophonus. There is al- 



so the elytron of another species. 

 Fam. Hydrophilid^e. 



2. Hydrohius, nearly as large as H. fuscipes, Linn. 

 Fam. Staphylinid^e. 



3. Lathrobium? (Plate VI. Fig. 1.) 

 Fam. Ptinid^t; ? 



4. Ptinus ? about the size of P. Lichenum, Marsh. 

 Fam. Melolonthid^. 



5. Cetonia, resembling C. hirtellus. 

 6. like C. stictica. Fab. 



Fam. CuECDLIONIDiE. 



7. Sitona? (Fig. 2.), The dark parts show the corneous covering Avhitli 



actually remains ; and when it is peeled off^ the impression of 

 the sculpture is very perfect : the wings of this and of Fig. 10. 

 are extended Iieyond the elytra, as if they had been arrested in 

 their flight. 



8. SitoTia? 



9. N'otaris? underside. 



10. Liparus, black, something like L. anglicanus, Marsh. 



11. Ditto, like L. punctatus, Marsh. (Fig. 3.) 



13. Hyper (u 



Fam. CHRYSOMELIDiE. 



14. Cassida^ and cast, the size of C. viridis. Fab. 



15. Ditto ? ditto, C. equestris. Fab. 



16. Chrysomela, and cast, scarcely so large as C. Baiiksii, Fab. 

 17- Ditto, under side (Fig. 4.) 



1 0. Ditto ? much smaller. 



OaoEE HYMENOPTERA. 



Fam. TENTHRi«DINIDj€. 



19. Tcnthredo, like Sclandria fuliginosa, Schr. 



Fam. ICHNEUMONIDyE. 



20. Ichneumon? the wings are wanting; but, from the long ovipositor, 



it is probably allied to Pimpla or Bracon. 

 Fam. FoRMiciDyE. 



21. Formica, and cast, winged. 



22. Ditto, apterous. 



23. Ditto, ditto. 



Order LEPIDOPTEUA. 



24. Phalmna 7 or it may be one of the Noclnidm. 



