COLEOPTERA . 
SO J 
FF. Metasternum without an antecoxal piece. 
G. Legs fitted for swimming. 
H. With only two eyes. p. 523. Dytiscide. 
HH. With four eyes, two above and two below, p. 
525...... GYRINIDE. 
GG. Legs fitted for walking, p. 537. Rhyssodide. 
DD. Ventral part of the first segment of the abdomen visible 
for its entire breadth. 
E. Antennas with a lamellate club (Fig. 74, 8, page 60). 
F. Plates composing club of antennas not capable of close 
apposition, and usually not flattened, p. 554. 
LUCANIDE. 
FF. Plates composing club of antennae capable of close 
apposition, and flattened, p. 556. Scarabeide. 
EE. Antennae either clubbed or not, but when clubbed not 
lamellate. 
F. Elytra short, leaving the greater part of the abdomen 
exposed ; the suture between the elytra when closed 
straight; wings present, and when not in use folded 
beneath the short elytra; the dorsal part of the abdom¬ 
inal segments entirely horny. 
G. Abdomen flexible, and with seven or eight segments 
visible below, p. 532... Staphylinide. 
GG. Abdomen not flexible, and with only five or six 
ventral segments visible, p. 531. Pselaphide* 
FF. Elytra usually long, covering the greater part of the 
abdomen ; when short the wings are wanting, or if pres¬ 
ent are not folded under the short elytra when at rest; 
the dorsal part of the abdominal segments partly mem¬ 
branous. 
G. Hind tarsi five-jointed. 
H. Antennae elbowed, and clavate. 
I. Elytra truncate behind, leaving two segments of 
the abdomen uncovered, p. 54 1 -Histeride. 
II. Elytra entire, p. 553 .Ptinide. 
HH. Antennae rarely elbowed, and then not clavate. 
I. Maxillary palpi as long as or longer than the 
antennae, p. 5 2 7 .Hydrophilide. 
II. Mnxillary palpi much shorter than the antennae. 
J. Tarsal claws very large ; the first three abdom¬ 
inal segments grown together on the ventral 
side. p. 543. Parnide. 
