94 British Dragonflics. 



n. 19 (1767). Lib. veronensis, Charp. Hor. Ent. 46 

 (1825). Lib. pallidistigina, Steph. Illustr. Brit. Ent. 

 Mand. vi. 94 (1835) ; L)ipiax pallidistigina, Evans Brit. 

 Lib. 27, pi. 20, f. I (1845). Lib. nigricula, Eversm. Bull. 

 Mosc. ix. 240, t. I, f. 1-2, (1836). Lib. nigra, Charp. 

 Lib. Eur. 83, t. xii. (1840). \^Lib. flavcola, Linn. Syst. 

 Nat., and Lib. flavcolata, Linn. Faun. Suec, seem to 

 refer partly to this species.] 



Donovan's description. 



I'horax \\\\\\ two oblique yellow bands. . . . Male. 

 Wings transparent, with deep black stigma ; abdomen 

 blackish. . . Female. Wings transparent, with deep black 

 stigma, and yellow base ; abdomen yellow, with two 

 black lines on each segment. (E. Dono\an, " The Natural 

 History of British In.sects," vol. xv., t. 523. 1792 — 181 3.) 



Size. 



Length of Male, 3 r to 34mm. ; expanse of wings, 48 

 to 5r5mm. Length of Female, 27-5 to 33mm.; expanse 

 of wings, 42"5 to 52mm. 



Male Imago. 



Head and face black as a whole, but sides of nasus 

 and frons yellow, and of the labium orange-brown ; 

 some yellow spots also behind the eyes, which are dark 

 brown. Protliorax black. Thorax black ; on the sides 

 two oblique yellow bands separated b}' a black one 

 containing a line of three yellow spots ; two yellow 

 spots also in front of the anterior yellow line ; on the 

 meta-sternum three }'ellow spots somewhat in the form 

 of a fleur-de-lys ; attachments of wings, and projections 

 between them, dark brown or yellowish-brown. Wings 



