53 



The Aquarium: 

 PLANTS. 



Water cress, duck weed, frog spittle, slime wort, bladder wort, 

 water weed. 



ANIMALS. 



Water scavenger beetle, back swimmer, water scorpions, water 

 bugs, mosquito larvae, water boatmen, nymphs of dragon and damsel 

 flies, nyniph of May flies, caddice larvae. 



ANTS. 



An ant's nest in a school room is a source of much interest and de- 

 light. An artificial nest can be cheaply and easily constructed. Par- 

 tially fill a tin or galvanized iron pan 12x15x2^ inches with water. 

 Above the water, support a pane of glass 10x10 inches on small blocks 

 of wood. Remove an ant's nest from the ground or a decayed stump 

 and put it on the glass, spreading it so that when a second pane is 

 placed on top the space between the panes will be one-quarter of an 

 inch. Cover the glass with a piece of cardboard to exclude the light, 

 removing only during observation. Keep the soil moist, and supply 

 food crumbs or sugar. In addition to the nest, a park can be made 

 in a dish containing moss, decayed earth, and material the ants have 

 been accustomed to in the woods. Connect the park and nest. The 

 community life seen through glass is of great interest. 



PLACE OF INSECTS IN ANIMAL KINGDOM. 



INVERTEBRATES. 



1. Branch. 



(a) Arthropeda. 



2. Class. 



(a) Crustaceans crayfish, sow bugs. 



(b) Arachnida spiders, scorpions, grand-daddy-long-legs, mites, 



and ticks. 



(c) Myriopoda centipede, millipeds. 



(d) Hexapoda insects. 



PARTS OF AN INSECT. 



1. Head. 



(a) Antennae "feelers." 



(b) Compound eyes. 



(c) Simple eyes or ocelli. 



(d) Mouth parts. 



