THE MOUTH SYSTEM. 389 



0. With many jaws, without the lip closing the mouth, 



(Kleistagnatfia) . 



10. With many" jaws without the lip, covered by palpi, 



(ExochnataJ. 



D. 



11. Mouth with a spiral tongue,between reflected palpi — 



butterflies and moths (Glossata). 



12. Mouth with a rostrum and a jointed sheath — bugs, 



&c. (Ryngota). 



13. Mouth with a sucker without joints—flies, &c. 



(Antliata). 



Cuvier^s Classification. 



I. Insects with Jaws. 



1. Without wings — crabs, spiders (Gnathoptera), 



2. With four equal wings— dragon-flies, &c. (Neur- 



opt era). 



3. With four unequal wings— bees, wasps (Hijinen- 



optera). 



4. With wing-cases — beetles (Coleoptera) . 



5. With four straight wings — crickets, &c. (Or- 



tlioptera). 



II. Insects without Jaws. 



1. With upper wings of unequal consistence — 



bugs, &c. (Hemiptera) . 



2. With powdery wings— butterflies and moths (Le- 



pidoptera) . 



3. With two wings — flies, &c. (Diptej'a). 



4. Without wings — fleas, mites, &c. (Apterq)* 



Lamarck's Classification. 



1. Insects with Jaws. 



1. With wing-cases — beetles (Coleoptera). 



2. With straight-wings — crickets, &c. (Oi'thoptera) . 



3. With four equal wings — dragon-flies (Neurop- 



tera). 



II. Insects with Jaws and a sort of Sucker. 



4. With four unequal wings — bees, &c. (Ht/men- 



opt era), 



2l3 



