::: What bug is this? ::: / Whit six legs - model 2

Inclusion whit six legs - model 2

Basic morphology of an insect whit six legs - click to enlarge
 
The different steps may contain scientific terms which may seem encouraged - I will recommend to search the word on google. Meanwhile, I am looking for pictures to illustrate each step - It is also the intention that these images will illustrate the foreign words. Can you help or do you maybe have access to such images, then I would be very happy to hear from you. Contact me here
 
  1. - Insect has wings? Go to 2
    - Insect wingless or with poorly developed (vestigial) wings. Go to 29

  2. - One pair of wings (two wings). Go to 3
    - Two pairs of wings (four wings). Go to 7

  3. - Body grasshopper-like, with enlarged hind legs and pronotum extending back over abdomen = Orthoptera
    - Insects not like this. Go to 4

  4. - Abdomen with 'tails'. Go to 5
    - Abdomen without 'tails'. Go to 6

  5. - Insects <5mm long, with relatively long antennae: wing with only one forked vein = Hemiptera
    - Larger insects with short antennae and many wing veins: tails long = Ephemeroptera

  6. - Fore wings forming club-shaped halteres = Strepsiptera
    - Hind wings forming halteres (may be hidden) = Diptera

  7. - Fore wings hard or leathery. Go to 8
    - All wings membranous. Go to 13

  8. - Fore wings tough apart from membranous tip = Hemiptera
    - Fore wings of uniform texture throughout. Go to 9

  9. - Fore wings (elytra) hard and veinless, meeting in centre line. Go to 10
    - Fore wings with many veins, overlapping at least a little and often held roofwise over the body. Go to 11

  10. - Abdomen ending in a pair of pincer-like cerci : elytra always short = Dermaptera
    - Abdomen without forceps: elytra commonly cover whole abdomen = Coleoptera

  11. - Insects with piercing and sucking beaks = Hemiptera
    - Insects with chewing mouthparts: cerci ('tails') usually present. Go to 12

  12. - Hind legs modified for jumping = Orthoptera
    - Hind legs not modified for jumping. Go to 49

  13. - Tiny insects covered with white powder. Go to 14
    - Insects not like this. Go to 15

  14. - Wings held flat at rest: mouth-parts adapted for piercing and sucking = Hemiptera
    - Wings held roofwise over body at rest: biting mouthparts = Neuroptera

  15. - Small, slender insects with narrow, hair-fringed wings: often found in flowers = Thysanoptera
    - Insects not like this. Go to 16

  16. - Head extending downwards into a beak = Mecoptera
    - No such beak. Go to 17

  17. - Wings more or less covered with scales: coiled proboscis (tongue) usually present = Lepidoptera
    - Wings usually transparent although often hairy. Go to 18

  18. - Wings with a network of veins, including many cross veins. Go to 19
    - Wings with relatively few cross veins. Go to 23

  19. - Abdomen with long terminal threads. Go to 20
    - Terminal appendages short or absent. Go to 21

  20. - Fore wings much larger than hind wings: wings held vertically over body at rest: 2 or 3 terminal threads = Ephemeroptera
    - Wings more of less equal in size or hind wings larger: wings folded close to body at rest: 2 terminal appendages = Plecoptera

  21. - Antennae very short: body at least 25mm long = Odonata
    - Antennae longer: greater than width of head. Go to 22

  22. - Tarsi 3-segmented = Plecoptera
    - Tarsi 5-segmented = Neuroptera

  23. - Wings noticeably hairy. Go to 24
    - Wings not noticeably hairy. Go to 25

  24. - All wings more or less alike: front tarsi swollen = Embioptera
    - Hind wings usually broader than fore wings: front tarsi not swollen = Trichoptera

  25. - Tarsi with 4 or 5 segments. Go to 26
    - Tarsi with 1 - 3 segments. Go to 27

  26. - All wings alike = Isoptera
    - Hind wings much smaller than fore wings = Hymenoptera

  27. - Hind wings similar to or larger than fore wings: abdomen with cerci = Plecoptera
    - Hindwings smaller than fore wings: no cerci. Go to 28

  28. - Tiny insects with at least 12 antennal segments = Psocoptera
    - Never more than 10 antennal segments: piercing and sucking beak present = Hemiptera

  29. - Insects with slender, twig like body = Phasmatodea
    - Insects not like this. Go to 30

  30. - Insects with grasshopper-like body and long back legs = Orthoptera
    - Insects not like this. Go to 31

  31. - Small, soft-bodied insects living on plants, often under protective shield or scale = Hemiptera
    - Insects not like this. Go to 32

  32. - Minute soil-living insects, <2mm long without antennae = Protura
    - Insects not like this. Go to 33

  33. - Insects with cerci or other abdominal appendages. Go to 34
    - Insects with other appendages. Go to 41

  34. - Abdominal appendages long and conspicuous. Go to 35
    - Abdominal appendages short or hidden under body. Go to 38

  35. - Abdominal appendages forming pincers. Go to 36
    - Abdominal appendages not forming pincers. Go to 37

  36. - Tarsi 3-segmented = Dermaptera
    - Tarsi 1-segmented = Diplura

  37. - Abdomen with 3 long terminal appendages = Thysanura
    - Abdomen with only 2 terminal appendages = Diplura

  38. - Tiny jumping insects, head points downwards forming a beak = Mecoptera
    - No sign of beak. Go to 39

  39. - Small or minute insects with a forked springing organ (furcula) under rear of abdomen: generally found in soil or decaying vegetation = Collembola
    - Insects not like this. Go to 40

  40. - Tarsi usually 4-segmented = Isoptera
    - Tarsi 3-segmented: front tarsi swollen = Embioptera

  41. - Parasites in fur or feathers: insects generally flattened side-to-side or dorso-ventrally. Go to 42
    - Insects not parasitic and not usually flattened. Go to 46

  42. - Jumping insects flattened from side-to-side = Siphonaptera
    - Insects not flattened from side-to-side. Go to 43

  43. - Insects of moderate size: head partly withdrawn into thorax. Go to 44
    - Small minute insects: head not withdrawn into thorax. Go to 45

  44. - Antennae very short: very 'leggy' insects with strong claws well suited to clinging to a host mammal = Diptera
    - Antennae long: body somewhat circular, with less prominant legs and claws = Hemiptera

  45. - Prothorax distinct: biting mouthparts = Mallophaga
    - Thoracic segments fused into one unit: sucking mouthparts = Anoplura

  46. - Abdomen with pronounced 'waist': antennae often elbowed = Hymenoptera
    - No such features. Go to 47

  47. - Body >5mm long, clothed with flattened hairs and scales: vestigial wings present = Lepidoptera
    - Body usually <5mm long, bald or occasionally scaly: vestigial wings rarely present. Go to 48

  48. - Head a wide or nearly as wide as body: biting mouthparts: insects often found among dried materials = Psocoptera
    - Head narrower than body: sucking mouthparts: abdomen often with a pair of tubular outgrowths (cornicles) near hind end: insects found on growing plants =Hemiptera

  49. - First pair of legs raptorial (used to grasp prey) and held close to the body at rest = Praying Mantids
    - Front legs not like this and body flattened = Cockroaches
 
This Key is based on the keys that can be found in: 
Insects of Britain & Northern Europe by Michael Chinery and 
The Practical Entomologist by Rick Imes - the key is found on this page
Arthropods - Quick Checklist
Use the search function in your browser. Press on your keyboard
"Ctrl"+"F" 
(it may be different from the various browsers)
- One pair of wings 
- Hind wings reduced to tiny knobs (halteres)

EPHEMEROPTERA (Mayflies)
- Very soft body
- Tip of abdomen with 2-3 thread-like tails (caudal filiments)
- Usually with two pairs of wings (sometimes one pair)
- When there are two pairs of wings, hind wings are much smaller than front wings

LEPIDOPTERA (Moths / Butterflies)
- Two pairs of wings covered with powdery scales
- Mouthparts usually a coiled tube (proboscis) for sucking

TRICHOPTERA (Caddisflies)
- Two pairs of wings covered with hair
- Wings held roof-like at rest

HOMOPTERA (Hoppers and Aphids)
- Sucking mouthparts in the form of a rigid beak
- Antennae often short and bristley
- Two pairs of wings (sometimes without wings)
- When wings are present, they are held roof-like at rest
- Body sometimes with hard projections that make it look like a thorn
- Forms without wings (aphids) have very soft bodies with two short projections (cornicles) at the tip of the abdomen

NEUROPTERA (Lacewings)
- Two pairs of wings with many cross veins, sometimes bright green
- Wings held roof-like at rest

PSOCOPTERA (Bark lice)
- Tiny insects with very soft, pale colored bodies
- Relatively long antennae
- Chewing mouthparts
- Two pairs of wings or without wings
- When wings are present, they are held roof-like at rest

ODONATA (Dragonflies & Damselflies)
- Antennae always short and bristley
- Abdomen always long
- Two pairs of wings
- Front and hind wings similar in texture, size and shape

ISOPTERA (Termites)
- Usually found in colonies with many individuals, some of which may have very large mandibles (soldier caste)
-Very soft, pale colored bodies
- Two pairs of wings or without wings
- When wings are present, front and hind wings are similar in size and shape, and held flat over abdomen when at rest

MECOPTERA (Scorpionflies)
- Head elongated into a "beak"
- Males with the last abdominal segment enlarged and held over the body like a scorpion's stinger
- Two pairs of wings (occasionally tiny or missing wings)
- Front and hind wings similar in texture, size and shape

HYMENOPTERA (Bees, Wasps, Ants)
- Body often with a narrow "waist"
- Two pairs of wings (bees and wasps), sometimes without wings (ants and wingless wasps)
- When wings are present, hind wings are smaller than front wings
- Antennae of the wingless forms usually have a bend in the middle

PLECOPTERA (Stoneflies)
- Body very soft, with two projections (cerci) at the end of the abdomen
- Two pairs of wings, hind wings wider than front wings
- At rest, the hind wings are folded underneath the front wings, and held flat over the abdomen

HETEROPTERA (Bugs)
- Front wings with clear tips (hemelytra), overlapping at rest, revealing a triangular panel on the back (scutellum)
- Front wings a rigid or leathery covering for clear hind wings
- Sucking mouthparts in the form of a rigid beak

COLEOPTERA (Beetles)
- Rigid front wings (elytra) meet in a straight line down the middle of the back
- Front wings (sometimes tiny) a rigid or leathery covering for clear hind wings
- Chewing mouthparts

BLATTARIA (Cockroaches)
- Front wings a rigid or leathery covering for clear hind wings
- Head hidden from above by a hood-like structure (pronutum)
- Chewing mouthparts
- Fast runners

MANTODEA (Mantids)
- Strong front legs with prominent spines for grasping prey, hind legs long and slender
- Front wings a rigid or leathery covering for clear hind wings
- Chewing mouthparts

ORTHOPTERA (Grasshoppers & Crickets)
- The femora of the hind legs are enlarged for jumping
- Front wings a rigid or leathery covering for clear hind wings
- Chewing mouthparts

PHASMIDA (Walking sticks)
- Slow-moving, resembles a twig
- Long, thin body with tiny or missing wings

COLLEMBOLA (Springtails)
- Very soft body, often smaller than 2mm
- Usually with a spring-like structure (furcula) on the underside of the abdomen used for jumping
- Without wings
- Mouthparts hidden within head

THYSANOPTERA (Thrips)
- Tiny insects with very soft, slender bodies
- Fairly short antennae
- Sometimes without wings, but adults may actually have barely visible wings with fringes of hair
- Sucking mouthparts

SIPHONAPTERA (Fleas)
- Tiny jumping parasites almost always found on mammals or birds, where they suck blood
- Body has flattened sides
- Without wings

DERMAPTERA (Earwigs)
- Prominent "pincers" (cerci) at the tip of the abdomen
- Tiny or missing wings
 
Found on www.amnh.com
I (Anders L. Damgaard) am the C.C. holder of all images, graphics and text on this page /CC BY-NC-ND 3.0/ read more at this page on the section: C.C. (Creative Commons)