q26 



British Dragonfiies. 



but it allows better of their examination. Often the 

 claws cling" to the board and keep the legs in position, 

 but sometimes it is necessary to use pins. The wings 

 next require attention, and some system of arrangement 

 had better be fixed upon from the first. The author 

 makes it a rule to have the costal margin of the hind- 

 wings in a straight line, and the fore-wings at some such 



Fig. 56. — Diagram to Illu.strate the Method of Setting a 

 Dragonfly. 



angle with them as that in Fig. 57. They should 

 first be held in position by the inner pair of 

 braces. Then the anal angles, which are often ver}- 

 important for classificatory purposes, and therefore 

 should be clearly displayed, must be kept horizontal by 

 means of two strips of thin cardboard or stiff paper, as 

 in the illustration. This being done, the tips of the wings 



