1/8 British DragonfJics. 



angle, suggest juncca, while the inferior anal appendage is short 

 even for that species. ^Moreover, Harris seems to speak of its 

 being customar)- for the insect to fly in June, whereas mixta 

 seldom, if ever, is on the wing so early as that month. The case for 

 coliihcrculus being thus uncertain, it does not seem expedient to 

 put it in place of mixta, which has so long been in common use.] 



Size. 



Length of Male, 6imm. to 66min. ; expanse of wings, 

 83min. to 85mm. Length of Female, 62mm. ; expanse 

 of wings, 85mm. 



Male Imago. 



Face greenish-}'ello\v ; fore and hind margin of 

 labrum black ; labium orange-bro\\n ; on upper surface 

 of frons a T-shaped black mark with its stem reaching 

 the broad black line in front of, and along the side of, 

 the eyes ; top of vertex \-cllow. Eyes contiguous for 

 a long distance, blue ; behind the eyes a small 

 triangular }'ellow spot. Prothorax dark, a little 

 yellowish at the sides. Thorax brown, with two broad 

 yellow oblic]ue stripes on each side, and two tin}- 

 yellow spots in front ; spots at the attachment of the 

 wings, and the projections between them \-ellowish. 

 Legs black. Wings hyaline ; costal margin brown ; 

 nervures black ; anal angle of hind-wings pointed. 

 Pterostigiiia dark brown ; length 3.5mm. Accessory 

 membrane whitish in front, gre\- behind, size moderate. 

 Abdomen dark brown, swollen at first and second 

 segments ; auricles on sides of second ; constricted at 

 middle of third ; nearly uniform from fourth to end ; first 

 segment brown dorsalh", \-ellow lateralh- ; second 

 with a yellow mid-dorsal triangular streak reaching 

 middle of segment, in middle two yellowish trans\-erse 



