(insect without wings - terrestrial - no terminal appendages)
|
| 56a. |
Insect living as
a parasite on a warm-blooded animal or closely associated with such an
animal (i.e. on the body or in the nest or den of a bird or mammal) |
57 |
|
| 56b. |
Insect not parasitic on a
warm-blooded animal |
61 |
|
|
| 57a. |
Body flattened from
side to side (jumping insect) |
Siphonaptera |
 |
| 57b. |
Body flattened from top to
bottom |
58 |
|
|
| 58a. |
Head partly withdrawn into
the thorax |
59 |
|
| 58b. |
Head not withdrawn into the
thorax |
60 |
|
|
| 59a. |
Antennae short and
inconspicuous (much shorter than the head); legs with strong and
distinctly hooked tarsal claws |
Diptera |
|
| 59b. |
Antennae long and
conspicuous (more than twice the length of the head); legs with small
and only slightly curved tarsal claws |
Hemiptera |
|
|
| 60a. |
At least the prothorax
distinct from the other thoracic segments; legs with small tarsal claws;
mouth-parts with jaws (mandibles) for biting |
Mallophaga |
|
| 60b. |
All the thoracic
segments fused into a single unit; legs with large tarsal claws which
can close tightly against the legs; mouth-parts forming a tube-like
proboscis for piercing and sucking (proboscis retracted within the
head when not in use) |
Siphunculata |
|
|
| 61a. |
Antennae absent
(minute soil-living insects usually less than 2 mm long) |
Protura |
|
| 61b. |
Antennae present |
62 |
|
|
| 62a. |
Abdomen strongly
constricted at its base into a narrow petiole or 'waist'; antennae
often bent into an elbowed shape |
Hymenoptera |
|
| 62b. |
Abdomen not constricted into a
'waist'; antennae more or less straight |
63 |
|
|
| 63a. |
Body covered with dense
scales and flattened hairs |
Lepidoptera |
|
| 63b. |
Body bare or with sparse
bristle-like hairs |
64 |
|
|
| 64a. |
Mouth-parts forming a tube-like
proboscis or rostrum for piercing and/or sucking (often folded
backwards under the head when not in use) |
65 |
|
| 64b. |
Mouth-parts with jaws
(mandibles) for biting and/or chewing |
67 |
|
|
| 65a. |
Tarsi usually 5-segmented |
Diptera |
|
| 65b. |
Tarsi with fewer than
5 segments |
66 |
|
|
| 66a. |
Proboscis small and
cone shaped (much shorter in length than the head) (small slender
insect often found in flowers) |
Thysanoptera |
|
| 66b. |
Proboscis or rostrum long
and jointed (nearly always longer than the head) (abdomen sometimes
with tubular outgrowths or cornicles near the hind end) |
Hemiptera |
|
|
| 67a. |
Antennae short and often
inconspicuous (at most about the same length as the head) |
68 |
|
| 67b. |
Antennae long and conspicuous
(much longer than the head) |
69 |
|
|
| 68a. |
Abdomen with 6 segments
or fewer |
Collembola |
|
| 68b. |
Abdomen with more than 6 segments (usually
8 or more clearly visible) |
(Larvae of various Orders) |
|
|
| 69a. |
Head narrower than
the body; mandibles very long and protruding forward well in front of
the head (clearly visible from above) |
Larvae of Neuroptera |
|
| 69b. |
Head as wide or nearly
as wide as the body; mandibles small and not protruding in front of the
head (not visible from above) |
Psocoptera |
|
|
