168 QUATERNARY PERIOD. 



In the lignitiferous clays of Diirnten Prof. Heer has found 

 Fig. 352. Fig. 353. Fig. 354. Fig. 355. Fig. 356. 



Fig. 357. 



Fig. 352. Dbnacia sericea^ Linn. Elytron, four times nat. size, from 



Diirnten. 

 Fig. 353. Donacia discolor, Gyll. Elytron, four times nat. size, from 



Diirnten. 



Fig. 354. Ditto, male, from Utznach, three times nat. size. 

 Fig. 355. Ditto, four times nat. size, from Utznach. 

 Fig. 356. HyloUus rugosus, Heer, rather more than three times nat. 



size, from Diirnten. 

 Fig. 357. CaraUtes (Harpalus ?) diluvianus, Heer, from Diirnten, four 



times nat. size, a, head and part of thorax ; 6, prothorax ; c, elytron. 

 Fig. 358. Pterostichus nigi'ita. Fab., sp., three times nat. size, from 



Diirnten. 

 Fig. 359. Cardbites cordicollis, Heer, four times nat. size, from Diirnten. 



very beautifully preserved elytra of a weevil (Hylobius rugosus, 

 Heer, fig. 356), an extinct species*, but very nearly allied 



* Elytra coal-black in this species, twice as long as broad, traversed by 

 rows of deep punctures, those in the sutural rows deeper and further apart 

 than in the middle rows ; interstices wrinkled. The punctures in the rows 

 are very deep ; the first and second rows were parallel to each other from the 

 base to the apex ; the third unites at the apex with the eighth, the fourth 

 with the fifth, and the sixth with the seventh. These last two pairs stop 

 within the space enclosed by the third and eighth rows. The interstices are 

 coarsely punctured and transversely wrinkled. The punctures are deeper at 

 the base than in the middle and at the apex of the elytra. The species differs 



