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<strong>Coleoptera</strong>: Archostemata<br />
Family Cupedidae<br />
• Elongate antennae<br />
• Elytra reticulate (network)<br />
<strong>Coleoptera</strong>: Adephaga<br />
• 1st abdominal sternite divided<br />
• Tarsi 5-segmented<br />
• Antennae never clubbed<br />
• Families<br />
– Dytiscidae (predaceous diving<br />
beetles)<br />
– Gyrinidae (whirligig beetles)<br />
– Carabidae (ground beetles)<br />
• Cicindelinae (tiger beetles)<br />
Dytiscidae<br />
•Streamlined<br />
•Antennae filiform<br />
•Hind tarsi with long hairs<br />
Gyrinidae<br />
• similar to dytiscids but<br />
• Eyes divided<br />
• Antennae short<br />
• mid & hind legs short and<br />
flat; front longer<br />
1
Carabidae<br />
• Head at eyes nearly always<br />
narrower than pronotum<br />
• Antennae inserted between<br />
mandible and eye<br />
• Many dark, shiny w/striate elytra<br />
• Often flattened<br />
Subfamily Cicindelinae<br />
• Usually metallic<br />
• Legs, tarsi long<br />
• Mandibles long, crossed (when<br />
closed)<br />
<strong>Coleoptera</strong>: Polyphaga<br />
• 1st abdominal sternite not divided<br />
by coxae<br />
• Tarsi variable<br />
• Antennae often clubbed<br />
<strong>Coleoptera</strong>: Polyphaga<br />
Families (for this week):<br />
• Hydrophilidae (water scavenger beetles)<br />
• Histeridae (hister or clown beetles)<br />
• Siphidae (carrion beetles)<br />
• Staphylinidae (rove beetles)<br />
• Lucanidae (stag beetles)<br />
• Scarabaeidae (scarabs)<br />
• Buprestidae (metallic wood-boring beetles)<br />
• Elateridae (click beetles)<br />
• Lampyridae (fireflies)<br />
2
Hydrophilidae<br />
• Antennae clubbed, not longer than max. palps<br />
• Some with ventral keel<br />
Histeridae<br />
•Most short, round<br />
•Elyra truncate<br />
•Often black, shiny<br />
Silphidae<br />
• Often large<br />
• Elytra somewhat broader toward rear,<br />
either loosely covering abdomen or leaving<br />
1 to 3 abdominal segments exposed.<br />
• Antennae clubbed, clavate or capitate, last<br />
3 segments often hairy<br />
• Common species black with yellow, red, or<br />
orange markings<br />
• Tarsi 5-5-5<br />
Staphylinidae<br />
• Adults elongate-slender, 0.7-25 mm<br />
• Elytra short, leaving 3 to 6 abdominal<br />
segments exposed<br />
• Tarsi usually 5-5-5, but 4-5-5, 5-4-4, etc.<br />
3
Lucanidae<br />
• Antennae geniculate<br />
• Male with large mandibles<br />
Scarabaeidae<br />
• Huge family<br />
• Robust beetles varying greatly in shape; 2 to 62 mm<br />
• Distinctive lamellate antennae<br />
• club generally 3 to 4 segments (max. 7); can be closed tightly<br />
• Tarsi 5-5-5<br />
Buprestidae<br />
• Hard bodied, elongate-slender to elongate-robust<br />
• 2 to 40 mm<br />
• Many species metallic or bronzed<br />
• Antennae usually short and serrate<br />
• Tarsi 5-5-5<br />
Elateridae<br />
• Elongate, parallel-sided, generally rounded each end<br />
• Pronotum pointed on posterior corners<br />
• Prosternum with spinelike process, fits into groove in mesosternum<br />
• Prothorax and mesothorax loosely joined<br />
• Antennae generally serrate, sometimes filiform or pectinate<br />
• Tarsi 5-5-5<br />
4
Lampyridae<br />
• Elongate, softbodied<br />
• 4.5 - 20 mm<br />
• Head concealed by flattened pronotum<br />
• Last 2 or 3 abdominal sterna often luminous<br />
• Tarsi 5-5-5<br />
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