Test 1 notes-1

Test 1 notes-1 - Test 1 Coleoptera Beetles 2 pairs of wings...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Test 1 Coleoptera: Beetles - 2 pairs of wings; first is very hard and armor like (elytra) - Largest order of insects - Coleoptera means “sheath wings” - Many types of antennae: clubbed, threadlike, fan-like, etc… - Can fly, but usually do not do so often - Chewing mouthparts, with well-developed mandibles - Predators, scavengers, and plant feeders are represented - Larvae are called grubs, grubs of some species of legs, others do not. Diptera: True Flies (Flies, Mosquitoes, Gnats) - “di” or 2 wings, so nly one pair of wings - Mouthparts are generally piercing/sucking or sponging - Good compound eyes - 2 nd pair of wings modified into halteres, which are sued for balance - Some mimic bees and wasps, very diverse order - Highly mobile - Some carry diseases, like malaria, yellow fever, encephalitis; others feed in unsanitary conditions and carry dysentery to our tables - Some flies are valuable pollinators of plants and some are parasites or predators of other insects - LARVAE: o Larvae of most ture flies are wormy looking (e.g. fly maggots) o They never have any jointed legs, although they may have some soft, fleshy prologs o Many fly larvae have no distinct head, just some mouthparts Lepidoptera: Butterflies and Moths - 2 pairs of wings, covered with scales. Lepidoptera means “scale wings” - Wings are joined together - Wings Scales: o Considered to be modified setae (hairs) o Can be iridescent, or contain ultraviolet pigments o Can be rubbed off - Lepidoptera Mouthparts o Mouthparts of adults are siphoning, with a coiled tube - Some important agricultural pests (as larvae), but many are harmless and important pollinators (as adults) - Butterflies fly only during the day and have knobbed antennae - Moths fly mostly at night and have antennae that are not knobbed - Butterflies and moths can both be colorful or drab - Some unusual mimics - Both can be pest insects, as larvae - Immatures o Larvae are called caterpillars o Have soft, fleshy, unjointed prologs and hardened, jointed true legs. Jointed legs are on the thorax; prologs are on the abdomen o Most larvae are extremely well-adapted to eat plants, and have well developed jaws o Poop shot to change direction of odor - Pupal Stage o Butterflies and moths look different in the pupa stage o Butterflies Very smooth, often brightly colored pupa Hangs upside down on a stalk Pupa is called a chrysalis o Moths Can see the legs, wings, and other body structures on the outside of the skin Brownish color Often in a silk cocoon Hymenoptera: Bees, Wasps, and Ants - Hymen= membrane + ptera = wings. Also “Hymeno” is the Greek God of marriage (referring to the union of the front and hind wings by means of hamuli- so 2 pair of wings - Adults are usually hard-bodied, active insects
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Test 1 - In many, the insect is thread-waisted - Compound eyes will developed - Compound eyes usually well developed - Antennae long and tread-like often elbowed - Mouthparts chewing or lapping/sucking - Social insects - Many possess a stinger
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/11/2008 for the course ENT 2004 taught by Professor Jrvoshell during the Spring '07 term at Virginia Tech.

Page1 / 9

Test 1 notes-1 - Test 1 Coleoptera Beetles 2 pairs of wings...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online