MICROSCOPIC OBJECTS. 60 



Fig. 119. Cyclops vulgaris, x 40. 



This animal is also drawn from life, as seen amongst a mass 

 of Conferva. It belongs to the Entomostraca, a division of 

 the large class Crustacea. The characteristics of the species 

 are : " Foot-jaws large and strong, branched ; eye single, 

 frontal; inferior antennse simple; external ovaries two." It 

 is variable in colour. They are extremely common, so that 

 scarcely any standing water can be seen without them. They 

 vary much in size. 



They may be mounted in diluted acetic acid, or in alcohol 

 and water (a shallow cell must be used) . 



Fig. 120. Asparagus-Beetle (Crioceris asparagi), 

 Order Coleoptera, x 6. 



This, together with the next drawing, has been taken to 

 illustrate the large order of Coleoptera or Beetles. The larvae 

 of this genus (Crioceris) are very destructive. The British 

 species, which represents the genus, lives on the asparagus. 

 The colour of the insect is tawny,, with large black bands or 

 bars on the elytra. This species, together with many of our 

 beetles, is too horny to be mounted in a transparent manner, 

 as is usual with many insects. The only way is to kill the 

 insect in boiling water, and immediately fix the legs &c. in 

 position, on white gummed paper, then cover with a cell, and, 

 after the beetle has become thoroughly dry and set, seal it as 

 nearly air-tight as possible. 



