A SYNOPSIS OF THE BRITISH DRAGON-FLIES. 45 



saffron at the base; pterostigma square, and black. 

 The adult $ almost entirely black. 

 b. Posterior wings with a blackish triangular spot 



at the base. 

 Front white, lower lip black, upper lip of the male 

 white, of the female black ; abdomen short, 

 with angular spots above ; pterost1gma square. 

 f. Anal appendages black. 



13. L. dubia, Vander Lind. ; Revue, p. 50. L. rubicunda, 

 Curt. pi. 712. 



Length 15 lin. ; exp. 26 lin. 



Habitat England, rare; near Dorchester. 



Black, spotted with orange, villous ; abdomen slender, 

 spotted above as far as the seventh segment ; wings 

 hyaline, a dot and a basal spot (larger on the posterior 

 wings) blackish ; pterostigma reddish ; vulvar scale 

 with two little valves, which are quadrangular and 

 contiguous. 



L. rubicunda, L. ; Revue, p. 53. Charp. pi. 13, L. pec- 

 t oralis, var. 



Length 18 lin. ; exp. 28 lin. 



Black, spotted with red or orange, villous; abdomen 

 slender, spotted above as far as the seventh segment ; 

 wings hyaline, a spot on the anterior, a dot and a spot 

 on the posterior blackish ; the pterostigma reddish, 

 $ ; or black, 5 ; vulvar scale with two very small 

 triangular valves, very remote from one another. 



In Belgium. 



L. pectoral is, Charp. pi. 13 ; Revue, p. 56. 

 Length 18 lin.; exp. 28 lin. 

 Black, spotted with red, or orange, villous; abdomen 



