| Insect wings have six major
veins running from the base of the wing to its outer margin. Their primary function
is to provide the wing with structural support. |
|
| C - 1st longitudinal vein, costa
(+) |
| Sc - 2nd longitudinal vein, subcosta
(-) |
| R - 3rd longitudinal vein, radius
(+) |
| Rs - its major branch, radial
sector (-) |
| M - 4th longitudinal vein, media
(+) |
| MA - anterior branch of media
(+) |
| MP - posterior branch of media
(-) |
| Cu - 5th longitudinal vein, cubitus
(+) |
| A - 6th longitudinal vein, anal
(+) |
| |
| Minor branches of these
veins are subscripted, i.e. R1,
R2, etc. |
|
As viewed dorsally, longitudinal wing veins are either convex (+) or
concave (-). |
