Beetles Identification Guide

9(8) Elytra exposing 4—6 abdominal terga (Fig. 34) ..... STAPHYLINIDAE
Elytra exposing 1—3 abdominal terga (Figs. 35 and 36) .....................10
10(9) Elytra without pubescence or spots (see Fig. 204). Fore tibia markedly
expanded (see Fig. 204) ........................................... (HISTERIDAE) 11
Elytra with pubescence or yellowish spots. Fore tibia not markedly
expanded ...............................................................................................12
11(10) Last exposed abdominal tergum at least three times as long as preceding
one. Prosternum without anterior lobe (Fig. 40). [Length of body 2.2—
2.8 mm] ......................................................... Gnathoncus nanus (p.124)
Last exposed abdominal tergum about same length as preceding one.
Prosternum with anterior lobe (Fig. 39). [Length of body 2.1—3.2 mm;
habitus Fig. 204] ............................................ Carcinops pumilio (p.124)
12(10) Antenna apparently 10-segmented, club apparently 1-segmented (Fig.
9) ................................................................... (RHIZOPHAGIDAE) 13
Antenna 11-segmented, club absent or 2-, 3-segmented (Figs. 10—21)
...............................................................................................................14
13(12) Head with deep, elongate foveae dorsally (Fig. 22). Pronotum widest at
middle or in posterior half, with distinct protuberance marking posterior
angle (Fig. 22). [Length of body 1.7—2.6 mm; habitus Fig. 230] ........
..........................................................................Monotoma picipes (p.171)
Head without foveae dorsally (Fig. 23). Pronotum widest in anterior
half, without protuberance marking posterior angle (Fig. 23). [Length
of body 1.5—2.0 mm] ............................... Monotoma longicollis (p.171)
14(12) Antenna with large, compact 3-segmented club (Fig. 10) ......................
......................................................................... (NITIDULIDAE) Key F
Antenna without distinct club (Fig. 12) or with small, loose, 3-segmented
club (Fig. 11) .........................................................................................15
15(14) Antenna with last 3 segments distinctly larger than previous ones (Fig.
11). Eye entire. [Length of body 3.0—4.3 mm; habitus Fig. 179] .......
..................................... (ANTHRIBIDAE) Araecerus fasciculatus (p.66)
Antenna with last 3 segments not distinctly larger than previous ones
(Fig. 12). Eye markedly notched at antennal insertion level ..................
.................................................................................. (BRUCHIDAE) 16
16(15) Hind femur with large tooth on lower margin, followed by 3—4 smaller
teeth; upper margin without tooth (Fig. 44). Length of body, 2.0—3.7
mm. Last exposed abdominal tergum with yellowish setae. [Habitus
Fig. 182] ................................................... Acanthoscelides obtectus (p.72)
12