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530 COLLEGE ENTOMOLOGY
2. Transverse suture in front of hind coxre extending across the metasternum
which is continued behind in a triangular process between
the hind coxre. . . . . . . . . 3
Transverse suture in front of hind coxa: very short, reaching only
across the central portion; metasternum not prolonged between the
hind caxre; front coxre globular: Ubire and tarsi without swimming
hairs; smail dull aquatic or semiaquatic beetles. Rare. AMPHIZOIDlE p. 537
3. Hind coxre normal; antennre ll-segmented, with at least the six apical
segments pubescent; terrestrial . 4
Hind coxa: fixed and extended into two broad plates covering the
femora and the base of the abdomen; antenme lO-segmented, without
pubescence; hind legs without fringe of long hairs for swimming;
aquatic. Small, oval, usually dark, water beetles. . HALIPLIDlE p. 537
4. Clypeus extending on each side beyond the base of the antenn::e; antennre
inserted on the front above the base of the mandibles; inner
lobe of lacinia terminating in a movable hook; eyes large; head vertical,
wider than thorax. Usually medium-sized, slender, brightly
colored or metallic blue and green beetles with yellow marks. They
occur in damp places and along waterways. Very alert and active.
(Tiger Beetles.) .. .... CICINDELIDlE
Clypeus not extending beyond the base of the antennre; antennre arising
from the sides of the head between the base of the mandibles and the
eyes; inner lobe or lacinia of maxi11::e not terminating in a movable
llOOk; eyes normal; head horizontal or slightly inclined, usually narrower
than thorax. Small to large, usually black, but may be brightly
colored and metallic reddish, blue, and green. Fast running. (Predacious
Ground Beetles.) . CARABIDlE p. 533
Family CICINDELIDlE Leach 1815, 1817 (Cic'in-del'l-dre, from· the Latin
cicindela, a glowworm; which has no particular application to these in­
._. sects). German, Sandk1:lfer. Tiger Beetles.
Medium-sized, elongated and usually slender, somewhat flattened or nearly
cylindrical land beetles, which are characterized by their swift movements,
long, dentate, curved mandibles, and long slender legs. The integument is
parchment-like or hard and usually smooth, punctate, or somewhat hairy
ventrally; somber-colored or mostly brilliant metallic green, blue, red, yellow,
and rainbow hues with stripes, spots, and many combinations of colors. Head
prognathous, large, free. Antennre inserted above the bases of the mandibles,
simple, filiform, ll-segmented. Eyes prominent. Mouth parts well developed.
Clypeus extending laterally over the bases of the antennre. Mandibles large
and formidable. Galea two-segmented. Lacinia terminating in a movable
segment or hook. Prothorax free, usually no wider than the head, with epimera
and episterna distinct. Wings usually well developed and permitting very
rapiq. flight; absent in Omus and other genera. Elytra often beautifully colored,
usually completely covering the body or exposing the prolonged tip of the
abdomen; fused along the median line in Omus. Legs long and slender. Tibial
spurs present. Tarsi five-segmented. Claws paired. The abdomen is often