19 On front-view of head, narrow black
band between the eyes not continued
down edges of eyes at each end. (Very
common species.) Sympetrum striolatum
male
(Common Darter)
— On front view of head, narrow black
band between the eyes continued down
the edges of the eyes at both ends.
(Extremely rare migrant - only once
recorded in Essex.) Sympetrum vulgatum
male
(Vagrant Darter)
20 Abdomen yellow (or yellowish brown)
with black markings.
Dark triangle on thorax.
(Extremely rare in Essex.) Sympetrum danae
female
(Black Darter)
— Not as above
21 Legs black. Sympetrum sanguineum
female (and immature male
(Ruddy Darter)
— Legs with yellow longitudinal stripes. ......................................
22 On front view of head, narrow black
band between the eyes not continued
down the edges of the eyes at each end.
Vulvar scale as shown (view tip of
abdomen from the side).
(A common species in Essex.) Sympetrum striolatum
female (and immature male)
(Common Darter)