12 
It is stated by Mr. Patterson that some of these insects appear to 
be attracted by particular colours.* 
They have also been observed to migrate in large bodies.t+ 
Meinecken states (Naturforsch, 6, 110), that he saw in a village 
in Anholt, ona clear day about four in the afternoon, such a cloud 
of dragon flies as almost concealed the sun, and caused great alarm 
to the villagers who were impressed with the idea that they were a 
swarm of locusts. 
They have also been observed in Silesia; and mention is made in 
Kirby and Spence of Mr. Woolnough, of Hollesley in Suffolk, wit- 
nessing “such an army of the smaller dragon flies (Agrionidz) 
flying inland from the sea, as to cast a slight shadow over a field of 
four acres as they passed.+ 
Species of Calepteryx and Agrions may often be captured with 
the fingers in great numbers in the evening asleep, on rushes and 
aquatic plants by the margin of ponds, &c. 
Having thus far attempted a slight description of the habits and 
peculiarity of this most beautiful and interesting class of insects, 
it only now remains to give the name and a brief description of 
each of the species figured which will be very concise, inas- 
much as it has not been thought advisable to comprehend within 
the compass of this work those amplified and extensive descrip- 
tions which are accessible to all such as will consult the works 
of Charpentier, Vander Linden, and Stephens. 
* Nat. Hist. Ins. mentioned in Shakspear, p. 234. 
+ Kirby and Spence’s Int. to Ent, vol. 2, p.10; and Journal of the Pro- 
ceedings of the Ent. Soc. of London, 7 Dec. 1835, p. 81. 
{ Kirby and Spence’s Int. to Ent., vol. 2, p. 10. 
