A Pictorial Key to the Order of Adult Insects

Transcription

1 Pictorial Key to the Order of dult Insects winged wingless (go to page 64) front wings hardened, leathery or parchmentlike at least at the base front wings membranous (go to page 61) chewing sucking without pincer-like cerci with pincer-like cerci front wings leathery at base and membranous at end front wings of uniform texture DERMPTER (earwigs) HEMIPTER (true bugs) HOMOPTER (leafhoppers, planthoppers, cicadas, spittlebugs) front wings with branched veins. front wings hard, without veins jumping insects. hind femur enlarged. tarsi with four or fewer segments walking insects. hind femur not enlarged. tarsi with five segments COLEOPTER (beetles) 60 ORTHOPTER (crickets, katydids, grasshoppers) DICTYOPTER (roaches, mantids, walkingsticks)

2 continued from key page 60 two wings four wings. pronotum extended over abdomen pronotum not extended over abdomen wings with few or no scales; without coiled proboscis. wings usually covered with scales. consist of coiled proboscis LEPIDOPTER (butterflies and moths) ORTHOPTER (pigmy grasshoppers) very slender wing with fringe of hairs as long as wing is wide no fringe of hairs, or if present, not as long as wing is wide THYSNOPTER (thrips) (go to page 62) end of abdomen without noticeable appendages end of abdomen with style or thread-like tail. with haltere-like organs in front of wings. with halteres behind wings. style-like tail. two or three thread-like tails COLEOPTER (male stylopids) DIPTER (flies, mosquitoes, gnats, midges) HOMOPTER (male scales) EPHEMEROPTER (mayflies) 61

3 continued from key page 61 hind wings equal to or larger than front wings (go to page 63) hind wings smaller than front wings no long abdominal appendages abdomen with two or three thread-like tails tarsi two or three segmented tarsi with more than three segments (usually five) EPHEMEROPTER (mayflies). piercing-sucking. chewing HOMOPTER (cicadas, leafhoppers, planthoppers, spittlebugs). antennae shorter than body; no noticeable scales. antennae as long as body; wings and body often with scales HYMENOPTER (bees, wasps, ichneumons) TRICHOPTER (caddisflies) 62 PSOCOPTER (barklice, booklice)

4 continued from key page 62 close to eye at end of beak-like structure some distance from eye wings never held flat over abdomen MECOPTER (scorpionflies). bristle-like inconspicuous antennae. antennae apparently with several segments wings held flat over abdomen ODONT (dragonflies, damselflies) hind wings with enlarged anal area folded fan-like; wings tend to curl around the body lengthwise hind wings without enlarged anal area folded fan-like; wings do not tend to curl around the body lengthwise MEGLOPTER (dobsonflies, fishflies, alderflies) NEUROPTER (lacewings, mantispids, owlflies, antlions) all legs of walking type hind legs modified for jumping ORTHOPTER (tree crickets). cerci usually long; more than eight segments. cerci short; with two to eight segments PLECOPTER (stoneflies) ISOPTER (termites) 63

5 continued from key page 60 antennae present antennae absent legs present legs absent head and thorax separate head and thorax fused DIPTER (louse flies, bat flies) HOMOPTER (scales) COLEOPTER (female stylopoids). collophore present;. spring-like organ usually present both collophore and spring-like organ absent long tail-like appendages absent three tail-like appendages present COLLEMOL (springtails) body not flattened. body flattened laterally. or dorsoventrally THYSNUR (silverfish) (go to page 66) (go to page 65) 64

6 continued from key page 64 body flattened dorsoventrally body flattened laterally sucking externally visible no sucking externally visible. antennae longer than head. antennae shorter than head SIPHONPTER (fleas) HEMIPTER (true bugs) DIPTER (louse flies and bat flies) antennae longer than head antennae shorter than head. tiny insects; tarsi with two or three segments. large insects; tarsi with five segments PSOCOPTER (booklice, barklice) DICTYOPTER (roaches, mantids, walkingsticks). head wider than thorax at point of attachment to thorax. head narrower than thorax at point of attachment to thorax MLLOPHG (biting lice) NOPLUR (sucking lice) 65

7 continued from key page 64 abdomen and thorax not narrowly joined together abdomen and thorax narrowly joined together body covered with scales body not covered with scales HYMENOPTER (ants) tarsal claws absent tarsal claws present LEPIDOPTER (female cankerworm) THYSNOPTER (thrips) piercing-sucking chewing cornicles absent. cornicles usually present with distinct head and eyes without distinct head and eyes HOMOPTER (aphids) HOMOPTER (female scales) HEMIPTER (bed bugs) abdominal forceps present; entire body rather hard and brown colored abdominal forceps absent (go to page 67) 66 DERMPTER (earwigs)

8 continued from key page 66. at end of beak-like structure some distance from eye not elongated, close to eyes cerci present cerci absent MECOPTER (scorpionflies). antennae longer than one-third of body length. antennae shorter than one-fourth of body length body leathery and usually grey or dark colored body soft and pale colored ORTHOPTER (crickets) PSOCOPTER (barklice and booklice) COLEOPTER (female stylopids) three to five tarsal segments. basal segment of front tarsi about same size as ones immediately following ISOPTER (termites) This document was archived November 2013 for photomacrography documentation purposes at the extreme macro website. ll rights reserved by the document authors 67