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1.
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Mesotibia with subapical notch and tooth on inner margin (Fig. 1) |
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1'.
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Mesotibia with inner margin entire; if present, mesotibial tooth at apex (Fig. 2) |
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Figure 1. Aschnarhyparus peregrinus |
Figure 2. Rhyparus mexicanus |
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2.
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Metatibial apex fringed with distinctly unequal spinules, mixed short and long (Fig. 3). Elytral intervals often dull |
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2'.
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Metatbial apex fringed with short spinules of eqaul length (Fig. 4). Elytarl intervals shiny |
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Figure 3.Diapterna hamata. |
Figure 4. Teuchestes fossor. |
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2(1).
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Meso- and metatibiae flattened, triangular in cross section (Fig. 3). Pronotal carina sharp, uniform height throughout length |
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Aschnarhyparus Makhan |
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2'.
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Meso- and metatibiae more cylindrical, circular in cross section (Fig. 4). Pronotal carina swollen; more prominent, bulbous anteriorly |
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Figure 3. Aschnarhyparus peregrinus |
Figure 4. Termitodius coronatus |
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3(1).
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Elytra not parallel-sided (Fig. 5), short, not more than 2 times longer than pronotum |
Nanotermitodius Howden |
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3'.
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Elytra parallel-sided, long, but 2.5 times longer than pronotum (Fig. 6) |
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Figure 5. Nanotermitodius peckorum,
from Howden 2003. Thanks and credits to Jennifer Read, Agriculture Canada |
Figure 6. Rhyparus opacus
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4(3).
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Discomedial carina of elytra lacking distinct setal tuft immediately anterior of apical trichomes |
Rhyparus Westwood |
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4'.
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Discomedial carina of elytra with distinct, narrow setal tuft immediately anterior of apical trichomes (Fig. 7-8) |
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Figure 7. Leptorhyparus sp. |
Figure 8. Leptorhyparus sp. |
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