640 Mr. D. Sharp and Mr. F. Muir on the Comparative 
PAGE PAGE 
Derodontidae . 5382 Othniidae : oon 
Discolomidae. . 524 Parnidae . “4 Doll 
Dryopidae. ; . 531  Passalidae. sole 
Dytiscidae . 492 Paussidae . ; . 490 
Kctrephidae . 535 Pelobiidae. . 491 
Elateridae . 545 Phalacridae . . 514 
Endomychidae . . 525 Phytophagoidea 620 & 634 
Erotylidae . 523 Platypidae ; . d512 
Eucnemidae . 546  Platypsyllidae . . 506 
Georyssidae . 531  Proterhinidae . 028 
Gyrinidae . . 493 Pselaphidae_. . B09 
Haliplidae . A901” Ptinidac ©. . 5384 
Helotidae . . 521 Pyrochroidae_ . . 553 
Heteroceridae . . 531 Pythidae . : . 553 
Histeridae . 512 Rhipiceridae . . 545 
Hydrophilidae . . 494 Rhipiphoridae . . 556 
Ipidae 5 . 572 Rhysodidae . 490 
Lagridae . . 551 Rbysopaussidae . . 590 
Lamprimidae. . 576 Scaphididae. . 506 
Lathridiidae. . 527 Scarabaeidae . . 580 
Leptinidae : . 506 Scarabaecidea 627 & 634 
Liodidae . : . 502 Scolytidae : oe 
Lucanidae . . 5738 Scydmaenidae . . 508 
Lyctidae . . 533 Silphidae . : . 002 
Lymexylonidae . 542  Sinodendronidae . 076 
Malacodermidae . 535 Sphaeritidae . Soe 
Malacodermoidea 623 & 634 Sphindidae . 933 
Melandryidae_ . . 552 Staphylinidae . . 496 
Meloidae . : . 556 Staphylinoidea 626 & 633 
Monommidae . . 552 Synteliidae i 7500 
Monotomidae . . 514 Temnochilidae . . 4 DG 
Mordellidae ; . 555 Tenebrionidae . 548 
Mycetaeidae_. . 526 Tenebrionioidea 624 & 634 
Mycetophagidae . 529 Throscidae : . 546 
Niponiidae . 512 ‘Trichopterygidae . 507 
Nitidulidae : . 515  Trictenotomidae » Ob 
Oedemeridae . . 554 Trogidae . my 
Ommadidae . 521 ‘Trogositidae . meav ks 
Ostomidae £1 DALG 
EXPLANATION OF FIGURES. 
The figures are all original, and have been drawn with the aid of 
a camera lucida from our own dissections. The scale of magnifica- 
