COLEOPTERA. 497 



DD. The Clavicornia (Clav-i-cor'ni-a) or Clavicom Beetles. 



— Isomera in which the first ventral abdominal segment is 



visible for its entire breadth, and in which the antennae are 



usually clavate or capitate, but not lamellate. 



The Water Scavenger Beetles, p. 527. 



Family Hydrophilid^e. 



The Beaver-parasite, p. 529. Family Platypsyllida;. 



The Leptinids. p. 529 Family Leptinid^e. 



The Carrion-beetles, p. 529 Family Silphid^e. 



The Scydmaenids. p. 531 Family Scydivlenid^e. 



The Pselaphids. p. 531 Family Pselaphid^e. 



The Rove-beetles, p. 532 Family Staphylinid^e. 



The Feather-wing Beetles, p. 533. 



Family Trichopterygid^e. 



The Hydroscaphids. p. 533. ...Family Hydroscaphid^e. 



The Sphaeriids. p. 533 Family Sph^eriid^. 



The Scaphidiids. p. 533 Family SCAPHlDiiDiE. 



The Phalacrids. p. 534 Family Phalacrid^e. 



The Corylophids. p. 534 Family CoRYLOPHiDiE. 



The Lady-bugs. p. 534 Family Coccinellid,e. 



The Endomychids. p. 535 Family ENDOMYCHiDiE. 



The Erotylids. p. 536 Family Erotylid^e. 



The Colydiids. p. 537 Family Colydiid/E. 



The Rhyssodids. p. 537 Family Rhyssodid^e. 



The Cucujids. p. 537 Family Cucujid^e. 



The Cryptophagids. p. 538 Family Cryptophagid^e. 



The Mycetophagids. p. 538 Family Mycetophagid/E. 



The Dermestids. p. 538..., Family Dermestid^e. 



The Histerids. p. 541 Family Histerid^e. 



The Nitidulids. p. 541 Family Nitidulidte. 



The Trogositids. p. 542 Family Trogositid^e. 



The Monotomids. p. 542 Family Monotomid^e. 



The Lathridiids. p. 542 Family Lathridiid/e. 



The Derodontids. p. 542 Family Derodontid^e. 



The Pill-beetles, p. 542 Family Byrrhid/e. 



The Georyssids. p. 543 Family Georyssid.*;. 



The Parnids. p. 543 Family Parnid^e. 



The Heterocerids. p. 543 Family Heterocerid^e. 



DDD. The Serricornia (Ser-ri-cor'ni-a) or Serricorn Beetles. 



— Isomera in which the first ventral abdominal segment 



is visible for its entire breadth, and in which the antennae 



are usually serrate. 



