called the wire-worm, is very destructive in our fields and 

 gardens. The beetles are called Elaters from a singular power 

 they possess of leaping when laid on their backs, by which 

 means they recover their legs ; when thus placed they some- 

 times contract their legs and lie as if dead, but they shortly 

 press their extremities against the surface on which they are 

 placed, and by means of the spine and socket before alluded 

 to, they dexterously leap up several inches. They fly well, 

 and are found on trees, grass, under stones, in flowers, decayed 

 wood, under bark, &c. At least 700 species have been disco- 

 vered in different parts of the world, which have been divided 

 into genera by Eschscholtz; but I can do no more than give 

 a type of each of those that are British. 



Steatoderus Esch. 

 1. ferrugineus Linn. — Don. 10. 356. 1. — Panz, 10. 10. 



Ludius Lat. — Ctenicera Lat. 

 4. pectinicornis Linn. — Don. 10. 356. 2. — Panz. 77. 1. 



Ampedus Meg. — Elater Esch. 

 8. sanguineus Linn. — Don. 15. 508. 2. — Panz. 5. 3. 

 Limonius Esch. 

 16. minutus Linn. — angustus Herb. 



Aplotarsus Ste. 

 21. bipustulatus Linn. — Panz. 76. 10. 



Ectinus Esc.h.1 

 23. aterrimus Linn. — Curt. Brit. Ent. pi. 694. 



My specimen, the only one I have seen, was taken at 

 Windsor by Mr. C. Griesbach. I do not doubt that it is the 

 true aterrimus, but Gyllenhal's seems to be another species. 



Lepidotus Meg. 



25. holosericeus Fab.—Oliv. 2. 31. t. 3./. 33.— undulatus Herb. 



Agrypnus Esch. 



26. murinus Linn. — Oliv. v. 2. gen. 31. t. 2.f.9. 



Melanotus Rich. — Cratonychus Dej. 



27. fulvipes Herb. — castanipes Mars. 



Sericosomus Serv. — Serious Esch. 



29. brunneus Linn. — Oliv. t. 3./. 30. 



Agriotes Esch. 



30. sputalor Linn. — variabilis Herb. 



Hypolithus Esch. — Cryptohypnus Esch. 

 33. agricola Zet. — Don. 1 6. 545. 



Selatosomus Ste. 

 39. seneus L. — impressus, cyaneus, Don. 15. 535. 1 and 2. 

 Drasterius Esch. 



41 . bimaculatus Fab. — Panz. 76. 9. 



Cardiophorus Esch. 



42. thoracicus Fab. — Panz. 6. 12. 



Ctenonychus Ste. 

 45. cylindrus Leach. 



Athous Esch. 

 47. niger Linn, — 01. t. 6.f. 65. — nigrinus Mars. 

 Dolopius Esch. 



55. marginatus Linn. — lateralis 01. t. 8./. 80. — suturalis, fulvus, Mars. 



Adrastus Esch. 



56. limbatus Fab. — 01. t. 7./. 73.? nitidulus Mars. — pusillus Herb. 



The Plant is Dactylis glomerata, Rough Cock's-foot-grass. 



