Beetles Identification Guide

Key C CRYPTOPHAGIDAE
1(0) Antennae inserted on frons, distance between antennal insertions equal
to or less than length of first antennal segment (Fig. 57). [Length of
body 1.2—2.2 mm; habitus Fig. 186] ............................ Atomaria (p.80)
Antennae inserted under acutely margined sides of frons, distance
between antennal insertions more than length of first antennal segment
(Fig. 58) ..................................................................................................2
2(1) Pronotum with anterior angle not thickened; lateral margins denticulate
(Figs. 59 and 60) ................................................................. (Henoticus) 3
Pronotum with anterior angle thickened, forming callosity; lateral margins
smooth or slightly crenulate (Figs. 63—74) ................ (Cryptophagus) 4
3(2) Pronotum widest near middle; lateral margins evenly arcuate (Fig. 59).
Eye larger, less conical (Fig. 59). [Length of body 1.8—2.3 mm; habitus
Fig. 188] ............................................................ Henoticus serratus (p.87)
Pronotum widest near base; lateral margins asymmetrically arcuate (Fig.
60). Eye smaller, more conical (Fig. 60). [Length of body 2.0—2.4 mm]
.....................................................................Henoticus californicus (p.87)
4(2) Elytra with setae unequal in length, smaller setae decumbent, longer ones
suberect and conspicuous or, in C. cellaris 3 , slightly raised and more or
less conspicuous ......................................................................................5
Elytra with setae subequal in length and decumbent ............................ 9
5(4) Eye smaller, conical, somewhat flattened anteriorly (Fig. 63). [Length
of body 1.7—2.4 mm] ............................... Cryptophagus laticollis (p.82)
Eye larger, hemispherical or slightly conical, not flattened anteriorly (Figs.
64—67) ................................................................................................... 6
6(5) Pronotum with anterior angle drawn out into fine point posteriorly (Fig.
61) ...........................................................................................................7
Pronotum with anterior angle not drawn out posteriorly (Fig. 62) ......8
7(6) Pronotum rather quadrate; lateral tooth in front of middle of side (Fig.
64). [Length of body 2.2—2.7 mm] ......... Cryptophagus stromus (p.85)
Pronotum rather transverse; lateral tooth near middle of side (Fig. 65).
[Length of body 2.0—3.2 mm] .................... Cryptophagus pilosus (p.82)
8(6) Elytra with longer setae suberect and conspicuous. Eye slightly conical,
smaller, prominent (Fig. 66). [Length of body 2.0—3.0 mm] ...............
.................................................................... Cryptophagus setulosus (p.84)
3 The species has been inserted in both couplets.
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