FROM THE EGG 129 



And into the division with sucking mouths : 



Lepidoptera, or butterflies and moths ; Dip- 

 tera or flies, gnats, etc. ; Hemiptera, or bugs, 

 including the plant-lice, etc. 



These divisions, however, have not been found 

 to be very satisfactory, although very simple when 

 dealing only with the perfect insect stage. In 

 the first place, being framed on this stage only, 

 they are not always applicable to the earlier 

 phases of the insect's life for instance, although 

 a butterfly or moth has a sucking proboscis, their 

 caterpillars have strong biting jaws, as any 

 gardener well knows. Also bees, wasps, etc., 

 rather upset the arrangement, as they have not 

 only a sucking mouth but also strong biting 

 jaws. 



This system of classification has therefore been 

 discarded by most entomologists in favour of 

 that based on the difference between those 

 insects which pass through the distinctive stages 

 of caterpillar and chrysalis on the one hand, 

 and those which emerge from the egg as dimi- 

 nutive likenesses of their parents on the other. In 

 this arrangement, the Coleoptera, Hymenoptera, 

 Lepidoptera, Diptera and Neuroptera, fall into the 

 B.W.A. K 



