128 FIRST LESSONS m ZOOLOGY. 



species of insects, and the jointed structure of body and 

 limb admits of the greatest range in form, and allows of 

 the greatest range of adaptation to the varied conditions of 

 the earth, water, and air. 



Undoubtedly the insects owe their supremacy in num- 

 bers to their, having wings, not being confined to creeping, 

 also to their undergoing a metamorphosis; while their brain 

 is complex, corresponding to the intellectual activity of 

 many species. (Sue Lnbbock'sAnts, Bees, and Wasps. 1882.) 



Classes of Aie-breathing Arthbopodb. 



1. Body soft, caterpillar-like Malaeopoda. Peripatus. 



2. Body hard, many-jointed, with many 



pairs of feet Myriopoda. Millepedes. 



3. Body in two regions; no wings; no an- 



tennae; eight legs Arachnida. Spiders, etc. 



4. Bodyin three regions; with wings; 61egs..7ra««(;to. Beetles,Bee. 



Obdbbs of Insects.* 



^- I^f^- "*'"' ^'^'^'''^ ''^^ \ Thymnura. Spring-tails, etc. 

 spring ) 



SSS^ntX'foSs \ ^--'^*-- Earwig. 



'TaTrfwTSS'foT^i^ ( ^'•^'^^^- Locusts, Grasshoppers 



*■ bl^k ^' °^.*;'!^'.°.^.'^.'. .^^*. .°'' } Plo-^yP^^O'- White Ants. 



5. Hind wings small Plectoptera. May Flies. 



6. Four net-veined wings, 1 



mouth-parts adapted for bit- I (,^^ ^ p,; 



mg; metamorphosis mcom- | ^ 



plete J 



^■fo°sicking*!.'?!°!'!'f '.'!!''' i^^'^^^^- ^^^- 



8. Wings net- veined ;metamor- iiVkiropfera. Lace- winged Fly, 

 phosis complete f etc. 



9. Fore wings sheathing the \ g^j ^^^^ 3,3^^3 

 hmder ones ) -^ 



10. One pair of wings Diptera. Flies. 



11. Four wings and body \ j^iooptera. Butterflies and 

 scaled; maxillse forming a V Iv""!?" iJui,i,ciuico 

 proboscis ) ' 



13. Four clear wings; hinder ) Hymenoptera. Ants, Beea^ 

 pair small; a tongue ) Wasps, etc. 



* There are in all sixteen orders of existing insects; for the deflni- 

 tions of those not mentioueu xieie see the author's larger Zoo?ogy. 



