Beetles Identification Guide

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Antennal cavity on ventral surface of prothorax carinate posteriorly (Fig.
90) ................................................................................. (Trogoderma) 15
14(13) Elytral vestiture of white, golden brown, and black setae producing
distinct pattern. Disc of pronotum with large, deep punctures separated
by less than their diameter (Fig. 91). Hind tarsus with first segment
subequal in length to second. [Length of body 2.9—4.9 mm; habitus
Fig. 198] ....................................................... Megatoma variegata (p.111)
Elytral vestiture of rather uniformly dark brown to black setae not
producing any pattern. Disc of pronotum with very small, shallow
punctures separated by more than their diameter (Fig. 92). Hind tarsus
with first segment no more than half as long as second. [Length of body
2.8—5.0 mm; habitus Fig. 195] .................... Attagenus unicolor (p.104)
15(13) Integument of elytra unicolorous or nearly so (vaguely mottled), without
clearly defined pattern 4 ..........................................................................6
Integument of elytra bicolorous, with defined pattern (Figs. 95 and 96)
...............................................................................................................18
16(15) Integument of elytra light yellowish brown to dark reddish brown;
pronotum usually darker than elytra. [Length of body 1.8—3.8 mm] ..
................................................................. Trogoderma granarium (p.118)
Integument of elytra dark piceous to black (sometimes with brownish
spots on humeral and apical parts); pronotum not darker than elytra ..
...............................................................................................................17
17(16) Setae on dorsum unicolorous, brownish to piceous. [Length of body
2.6—4.0 mm] ........................................... Trogoderma sinistrum (p.119)
Setae on dorsum of two or three colors, brownish to piceous, white, and
golden [Length of body 2.0—4.0 mm; habitus Fig. 202] ........................
.....................................................................Trogoderma glabrum (p.114)
18(15) Eye with medial margin notched (Fig. 76). [Length of body 2.0—5.0
mm] .......................................................... Trogoderma inclusum (p.119)
Eye with medial margin entire or only slightly notched ......................19
19(18) Basal and submedian bands of elytron not joined by longitudinal line (Fig.
95). Males 5 with antennal club not serrate (Fig. 87). [Length of body
2.0—4.6 mm] ........................................... Trogoderma variabile (p.120)
Basal and submedian bands of elytron joined by longitudinal line or lines
(Fig. 96). Males 5 with antennal club serrate (Fig. 88). [Length of body
2.4—4.0 mm] ............................................. Trogoderma sternale (p.120)
4 Be careful not to confuse the coloration of the integument with that of the setae.
5 Males differ from females in having the antennal club seemingly 6- or 8-segmented
instead of 4-segmented (see Figs. 251 and 252).