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ANIMAL BIOLOGY 



TABLE FOR CLASSIFYING INSECTS (class Insectd) INTO 

 ORDERS 



ORDER 



j Biting Insects; mouth parts for grasping 

 and biting 



B! Wingless; changes (metamorphosis) No WINGS 



incomplete (Aptera) 



B 2 Under wings thinner than upper wings, FAN WINGS 



and fold like a fan beneath them ; changes (Orttoptera) 



incomplete 



B 3 Upper wings hard and thick, protecting SHEATH WINGS 

 under wings, which fold both lengthwise (Coleoptera) 



and crosswise beneath them; changes 

 incomplete 



B 4 All four wings nearly alike, finely veined, 

 transparent 



Cj Hind wings smaller than fore, two NERVE WINGS 

 or three filaments attached to abdo- (Neuroptera) 



men, antennae long ; changes com- 

 plete 



C 2 Hind wings not smaller than fore; FALSE NERVE 

 no filaments on abdomen, antennae WINGS 



inconspicuous ; changes incomplete (Pseudoncuroptera) 



o Sucking Insects ; mouth parts for sucking 

 or licking 



B x Basal half of upper wing usually leathery, HALF WINGS 



other half of wing transparent ; lower lips (Hemipterd) 



transformed into a tube ; true bugs 

 B 2 Four wings covered by scales, holding- SCALY WINGS 



jaws (maxillae) elongated to form a suck- (Lepidoptera) 



ing tube coiled under head ; changes 



complete 

 B 3 Four wings, membranous, hind wings JOINED WINGS 



hook to fore wings in flight ; mouth parts (Hymenoptera) 



for both biting and sucking; abdomen 



with sting; changes complete 

 B 4 Two wings, mandibles rudimentary, Two WINGS 



mouth a soft beak (Diptera) 



B 5 No wings, mandibles rudimentary, mouth LOST WINGS 



a horny beak (Siphonoptera) 



