wings, and from all the other Dragon-flies by the small central 

 lobe of the labium, as well as by the vesicle on the crown of 

 the head. 



The species of Cordulia are the following : 



1. metallica Vand. Lind. Mon. 18. 13. — Schcnf. Icon. tab. 113. 

 y; 4. ? . — Roesel 2. Aq. II. tab. 5.f. 2. ^ . — Harris Expos, 



tab. 27./. 2. ? . 



Brassy-green, abdomen thickened in the middle, all the anal 



appendages in the male simple, acuminated ; wings lutescent, 



stigma yellow. 



This species is admitted as British on the authority of Van- 

 der Linden, who quotes Harris's figure as the male, but it is 

 the female he has represented. 



2. aenea Linn. — Schccf. tab. 161 -f. 4. ? . tab. 182./ 1. ^. — Sew. 

 Brit. Mis. tab. 47. d". — Don. 12. 415. (?. 



Brassy green, abdomen thickened towards the apex, inferior 

 anal appendages furcate in the male ; stigma black ; labium 

 and spots on the underside of 2 or 3 of the basal abdominal 

 segments ochreous. 



This species has been taken from the end of May to July 

 atWinandermere; nearWisbeach; in Starston and Costessey 

 Woods, Norfolk ; Martlesham Heath, Suffolk; Woodford; Ep- 

 ping Forest; Hampstead; near Beaulieu, Brockenhurst; and 

 Pennington Commons, Hants. I have generally found it in 

 plantations where there are fir-trees, in such situations as Ca- 

 lepteryx frequents. 



3. Curtisii Dale. — Curt. Brit. Ent. pi. 616. ^. 

 Male glossy green, with ochreous pubescence; face bright 

 green ; base of the labrura and the labium ochreous ; eyes 

 pale pea-green, with a purple transverse stripe ; back of the 

 thorax ochreous, marked with black; abdomen compressed, 

 with a line of yellow spots down the back, decreasing in 

 length, forming 2 connected oval spots on each segment, 

 the basal one being the largest, 7th and 8th segments with 

 a pale margin only ; wings of a very pale yellowish tint, with 

 a small space at the base bright ferruginous ; stigma, ner- 

 vures and legs dark piceous ; anterior thighs ochreous in- 

 side at the base. Female with ferruginous-yellow wings, 

 softened into pale brown towards the posterior margin. 

 This fine species, which is unknown upon the Continent, 

 was discovered by Mr. Dale on Parley Heath the 29tli June, 

 1820, and subsequently at Hurne in Dorsetshire as late as 

 the 16th July. On the 8th June, 1831, I captured a specimen 

 on the side of Ramsdown near Heron Court, in company with 

 Mr. Dale, who soon after described it in Loudon's Magazine 

 under its present name. I understand it has also been taken 

 on Braunton Burrows, Devon, by Mr. Cocks. 



The plant is Liizula {Juncus) campestris^ Field Rush. 



