How To Study Living Animals


9. KEY TO THE PRINCIPAL ORDERS OF INSECTS

A1

Insects with no wings herunterladen. (See list below.)

 

A2

Insects with wings

B

B1

With two pairs of wings herunterladen. (See Note 1 below.)

C

B2

With one pair of wings

 

Diptera

C1

Both pairs of wings alike in structure, either membranous or scaly

D

 

C2

Fore and hind wings unlike in texture, fore wings fold over hind wings

E

 

D1

Both pairs of wings membranous, not covered with scales

F

 

D2

Both pairs of wings covered with scales; mouth parts tubular for sucking

 

Lepidoptera

E1

Fore wings very smooth, sheath or shell-like, meeting in a straight line when folded; legs adapted for walking, running, or swimming; mouth parts for biting

 

Coleoptera

E2

Wings not as in E1

I

 

F1

Wings membranous, usually folded or partly folded; few nerves

G

 

F2

Both pairs of membranous wings usually outspread, many nerves; mouth parts for biting

H

 

G1

Wings membranous, hooked together and partly folded, or outspread, few nerves in the wings; mouth parts for both biting and sucking; regions of the body usually very distinct

 

Hymenoptera

G2

Wings membranous, usually folded, few nerves; mouth parts, a beak for sucking and piercing

 

Hemiptera

H1

Outspread membranous wings, nearly equal in size; antennæ very short and inconspicuous

 

Odonata

H2

As in F2, but antennæ not short; wings sometimes folded

 

Neuroptera

H3

Both pairs of wings membranous, folded above the back; fore wings much larger than hind wings; ovipositors long; mouth parts rudimentary

 

Ephemerida

I1

Fore wings folded over hind wings, crossing at their tips, which are membranous, base of wings thickened, mouth parts a beak for piercing

 

Hemiptera

I2

Fore wings leathery, folding either at side of body or on the back; mouth parts for biting, legs often adapted for jumping

 

Orthoptera

Note 1 microsoft office kostenlos downloaden vollversion deutsch chip.—When wings are folded, it will be helpful to remember that thickened fore or cover wings always have membranous wings folded beneath them.

 

Insects with no wings

Order

a.

Body long and slender, stick-like; legs for walking. Walking stick

Orthoptera

b.

Grasshopper-like. Cricket grasshopper

Orthoptera

c.

Small size; regions very distinct; abdomen spindle-shape. Ants

Hymenoptera

d.

Small size; ant-like in appearance; pale white. White ants

Isoptera

e.

Flattened body, small size; no compound eyes. Springtails and fish moths

Thysanura