British Dragonflies. 



Illustr. Brit. Ent. Mand. vi. 96 (1835). Dip. basalis 

 Evans Brit. Lib. 28, pi. xxi., f. i (1845). Lib. angusti- 

 pcnnis, Steph. Illustr. Brit. Ent. Mand. vi. 95 (1835). 

 Dip. angnstipcnnis, Evans Brit. Lib. 27, pi. xx., f. 2 

 (1845). Lib. nvsclii. Curt. Brit. Ent. xv., fol. 712 (1838) ; 

 Selys Mon. Lib. Eur. 47 (1840). Lib. iiigripes, Charp. 

 Lib. Eur. yy, pi. x., f. i (1840). 



Miiller's description. 



Libellula sanguinea, alis hyalinis puncto marginali 

 ferrugineo : dorso sanguineo. (O. F. Miiller, " Fauna 

 Insectorum Fridrichsdalina," p. 62, n. 547, 1764.) 



Size. 



Length of Male, 33min. to 36mm. ; expanse of wings, 

 50mm. to 57mm. Length of Female, 33mm. to 36mm. ; 

 expanse of wings, 53mm. to 58mm. 



Male Imago. 



Face deep yellow ; frons of a reddish tint ; lower lip 

 deep red ; a distinct black line in front of the vertex, 

 extending along the side of the eyes. Eves dull reddish. 

 Prothorax dark anteriorly, brown behind. TJiora.x red- 

 brown, with three oblique lateral black lines ; attach- 

 ments of the wings crimson. Wings hyaline, the base 

 of the hind-wings and a slight touch at the base of the 

 fore-wings saffron ; nervures deep red of a blackish 

 appearance. Ptcrostigiiia about 2'5mm., deep red between 

 two black nervures. Accessory vienibrcme narrow, dark 

 except at base. Legs black. Abdomen deep rich crimson, 

 short, much compressed about the fourth segment and 

 dilated about the seventh and eighth ; ncarl\- the whole 



