A XI MA I. BIOLOGY 



TABLE FOR CLASSIFYING INSECTS (class Insect a) INTO 

 ORDERS 



A, Biting Insects ; mouth parts for grasping 

 and biting 



B, Wingless; changes (metamorphosis) 



incomplete 

 B., Under wings thinner than upper wings, 

 and fold like a fan beneath them ; changes 

 incomplete 

 B 3 Upper wings hard and thick, protecting 

 under wings, which fold both lengthwise 

 and crosswise beneath them ; changes 

 incomplete 

 B 4 All four wings nearly alike, finely veined, 

 transparent 



Cj Hind wings smaller than fore, two 

 or three filaments attached to abdo- 

 men, antennae long ; changes com- 

 plete 

 C, Hind wings not smaller than fore; 

 no filaments on abdomen, antennae 

 inconspicuous ; changes incomplete 



Order 



No Wings 



(Apterd) 

 Fan Wings 



(Or t hop t era) 



Sheath Wings 



( Coleopterd) 



Nerve Wings 



(Xetiropterd) 



False Nerve 

 Wings 



(Pseudoneuropterd) 



A Sucking Insects ; mouth parts for sucking 

 or licking 



B x Basal half of upper wing usually leathery, 

 other half of wing transparent ; lower lips 

 transformed into a tube ; true bugs 



B 2 Four wings covered by scales, holding- 

 jaws (maxillae) elongated to form a suck- 

 ing tube coiled under head ; changes 

 complete 



B ;1 Four wings, membranous, hind wings 

 hook to fore wings in flight : mouth parts 

 for both biting and sucking ; abdomen 

 with sting ; changes complete 



B 4 Two wings, mandibles rudimentary, 

 mouth a soft beak 



B 5 No wings, mandibles rudimentary, mouth 

 a horny beak 



Half Wings 



(Hemiptera) 



Scaly Wings 



(Lepidopterd) 



Joined Wings 



{Hymenopterd) 



Two Wings 



(Dipterd) 



Lost Wings 



(Sipkotwptera) 



