Entomology exam 3. Lab identify these images

Name the family

Curculionidae - weevils/ snout beetles

Name the family

Silphidae- carrion beetles

• clubbed antennae w/ hairy apical segment

• elytra broad, somewhat short

• abdomen tip usually exposed

• strong maternal care

  • tunnel below carcasses

Name the family

Elateridae- click beetle

Name the family

Passalidae- bess beetles/ bugs

Name the family

Buprestidae (larvae/ flathead boar)

Name

Passalidae- bess beetle

Name

Lucanidae - stag beetle

Family?

Scarabidae- scarabs, dung beetle, june beetle, etc.

Family?

Hydrophilidae- water scavenger beetle

Family?

Cerambycidae - long horned beetle

• very long antennae

• compound eyes notched at inner margin

• legs with phytophagan tarsus

• diet- herbivours as adults and larvae

• large economic impact

Family

Lampyridae- fireflies & kin

Family?

Chrysomelidae - leaf beetle

Family?

Staphylinidae- rove beetles (#29)

• largest family

• short elytra

• 3 or + abdomen

• segments exposed

• diet variable, most predatory

Family?

Meloidae- blister beetle

• elongate, soft, leathery

• broad head, wider than narrow pronotum

• diet- herbivores

• bleed noxious chemicals- CANTHARIDIN

• highly toxic to horses

• larvae- emit allomones that attract host

Family?

Chrysomelidae- leaf beetles

Family?

Scolytidae- bark beetle

Family?

Chrysomelidae- leaf beetle

Family?

Scolytidae- bark beetle

• small, cylindrical, dark

• head often pointing down

• abdomen apex often modified

• diet- herbivores

• currently causing massive deforestation- damaging to timber industry

Family?

Scaraboidae

Family?

Scaraboidae - “Lamellicorn” beetle

Family?

Elateridae - click beetle

• jump assisted by ventral spine on thorax

• points on hind corner of prothorax

• diet- mostly herbivores

• larvae- wireworms

• destroy seeds, roots

Family?

Chrysomelidae- leaf beetle

Family?

Chrysomelidae-leaf beetles

• variable in shape but often CONVEX

• antennae usually NOT clubbed

• phytophagan tarsus

• appear 4-4-4 but actually 5-5-5

• herbivours- both adults and larvae

• man pests- potato beetle, spotted cucmber bettle

Family?

Hydrophilidae- water scavenger beetle

• carry air bubble on » ventral surface

• swim by » alternating leg strokes

• long maxillary palps

• mesosternum w/ posterior spine

Family?

Scarabaeoidea- ‘Lamelicorn’ beetle

Family?

Dermestidae- carpet beetle

Family?

Curculionidae - weevils/ about beetle

• 2nd largest family

• long rostrum

• legs with phytophagan tarusus

• often witch scales

• herbivors as adults and larvae

• many pests of crops and stored grains

Family?

Cerambycidae - long horned beetle

Family?

Staphylinidae- rove beetle

• largest family

• short elytra

• 3 or + abdomen segments exposed

Family?

Meloidae- blister beetle

Family?

Scaraboidae- scarabs, dung beetles, june beetles, etc.

• antenna w/ asymmetric club w/ apical closeable plates

• males often with horns

• diet- variable, plants, dung, carrion

• larvae- white grubs

Family?

Hemiptera - imposter!

Family?

Curculionidae - weevils/ about beetle

Family?

Coccinellidae- lady bugs, including Asian lady bug

• oval to round

• tarsi apparently 3-3-3 (actually 4-4-4)

• most predatory

Family?

Chrysomelidae- leaf beetle

Family?

Buprestidae - jewel beetle

• often metallic, shiny, hard

• setae indistint/lacking

• bullet shaped

• diet- herbivours

• larvae distinctinve “flat heads”

• large economic impact

Family?

Coccinellidae- lady bug

Family?

Elateridae- click beetle

• jump assisted by ventral spine on thorax

• points on hind corner of prothorax

Name the order, family and give common names for two subfamilies

• Megaloptera

• Corydalidae

• Dobson fly

Note the long cersei-like projections from the end of the abdomen diagnostic for larva of colioptera. Although absent and many families. What are these structures called?

Urogomphi

Name the family and a diagnostic feature

Gyrinidae- whirligig beetle

• paddle shaped legs

• divided eyes

• Front legs upright

• predatory

Family?

Dytiscidae- predaceous diving beetle

• threadlike antennae

• hind legs paddlelike

Name the family and a diagnostic feature

Carabidae- ground beetles

• head (across eyes) narrower than pronotum

• striate olytra

Name the family and a diagnostic feature

Carabidae- ground beetle

• head width at eyes narrower than pronotum

• striate elytra

Name the family and a diagnostic feature

Cicindelidae- tiger beetle

• head wider than pronotum

• long mandibles and teeth

Name the suborder

Adephaga

Name the suborder

Polyphaga

• economically important

  • negative- crop and timber damage

  • beneficial- weed control, predation

Locate the forewings. How are they unusual? What are they called in this case (singular & plural)?

Rigid. Elytron/elytra

Name the family and a diagnostic feature

Hemerobiidae- brown lacewing

• larvae do NOT attach debris

• predatory

• forewing with anterior veins ending in "Y"

Name the family, and a diagnostic feature. How is it different from Mantodea?

Mantispidae- mantis fly

• raptorial fore legs

Name the order, family, and a diagnostic feature for both the order and the family.

order- Neuroptera

• soft abdomen, ocelli and cerci absent

family- Myrmeleontidae/ant lion

• (adult) antennae with thickened, curved ends