Ears: Difference in location, grasshoppers vs. crickets
Sound production for mate attraction via stridulation
How does sound production differ between grasshoppers and crickets?
Order Hemiptera: true bugs: Includes water striders, water boatmen and backswimmers, plant bugs, stink bugs, assassin bugs, box elders, etc…
Mouthparts are piercing-sucking. They extend from the anterior portion of the head to form a long, multisegmented rostrum (or “beak”). The beak is tucked beneath the thorax and abdomen, often within a groove when not in use, swings forward.
Triangular-shaped scutellum on mesothorax between the forewing bases (distinctive)
Forewings: basal portions are thickened and colored while the distal portions are membranous
Hindwings are membranous
Wings held flat against body.
Water bugs: water scorpions, giant water bugs, water boatman, backswimmers
Adaptations to aquatic environment?
Surface-dwelling bugs (i.e. water striders)
What enables them to walk on water?
Terrestrial bugs (diverse terrestrial habitats)
Food/Feeding behavior (some select examples)
Neopterous endopterygotes (wing-flexion, complete metamorphosis = within pupae)
Order Coleoptera (“coleo” = sheath): beetles Most diverse of the insect orders
“A survey of the feeding habits of the order could well apply to the entire Class Insecta.”
Pollinators, predators. blood suckers, etc…
Housefly (Family Muscidae) feeding: Feed on solid organic matter by regurgitating saliva with proteolytic enzymes and then sponging it back up with their mouthparts.
Several groups transmit disease-causing pathogens, most of which are prevalent in the tropics
Mosquitoes transmit more different diseases than any other insect group (such as…?)
Black flies transmit the nematode that causes river blindness
House flies: More than 100 pathogens associated with the house fly may cause disease in humans and animals, including typhoid, cholera, dysentery, tuberculosis, infantile diarrhea, and parasitic worms.
What features of houseflies cause them to spread so much disease?
Abundant black flies and midges poor water quality.
Order Trichoptera (briefly)
Order Lepidoptera (“lepido”= scale): butterflies, moths, 2nd largest order
large compound eyes; may have 2 ocelli
mouthparts: long, coiled proboscis for sucking liquids (not piercing); larvae have chewing mandibles
Two pairs of membranous wings covered with small scales.