'"HE BUMBLEBEE. 47 



One is represented by the Agriouidse, in which the 

 wings of the imago fold together on the back, and 

 whose larva breathes through thin leaf-like gills at the 

 tail. The other kind is represented by the Libel- 

 lulidse, whose wings do not fold and whose larva looks 

 something like the larva of the giant water bug. The 

 metamorphosis is complete, although the pupa has 

 no resting stage. 



This old order, Neuroptera of Linnaeus, has been 

 broken up into five or six orders by more recent wri- 

 ters. It is probably better to call the order to which 

 the dragon fly belongs Odonata. 



THE BUMBLEBEE. 



1. Find the body divisions. How many segments 

 in the abdomen? How is the abdomen joined to the 

 thorax? Can you find any indications of extra seg- 

 ments on the thorax? 



2. Describe and draw the eyes, ocelli, mandibles, 

 antennae. How many segments in the antennae? 



3. The other mouth parts are the tongue, maxillae, 

 and labial palpi. The tongue is the hairy organ. 

 The labial palpi terminate in two short segments. 

 Can you find aiiy trace of rudimentary maxillary 

 palpi? 



4. Study the wings. See how the fore and hind 

 wings fasten together. Examine the front edge 

 of the hind wing for hooks that fasten the wings 

 together. 



5. Homologize the parts of the leg. See the flat 

 " pollen basket " on the tibia of the hind leg. It is a 

 smooth, shiny surface surrounded by stiff hairs. Is 

 any pollen sticking to it? 



6. What is honey? Where do the bees get it? 

 What is pollen? Where obtained? For what used? 

 What is wax? How obtained? 



