Front wings of about the same thickness throughout, not overlapping at 

 tips 5. 



5. Front wings horny, not with a network of branching veins 6. 

 Front wings leathery, with branching veins 7. 



6. With large structures resembling a pair of pinchers on the posterior end 



of the body 



Dermaptera Earwigs 

 Without such pinchers 



Coleoptera Beetles 



7. Animal with a sucking beak on under side of head and usually folded 



against the body 



Heteroptera True Bugs 

 (Hemiptera (part) ) 

 Animal with definite chewing mouth parts 



Orthoptera Grasshoppers, Crickets, etc. 35. 



8. Very small, usually not over one-quarter of an inch; foot ending in a 



rounded knob 



Thysanoptera Thrips 

 Larger; foot ending in one or more hooks 9. 



9. Wings at least partly shingled with minute scales 10. 

 Wings not so shingled; network of veins visible 12. 



10. Largely nocturnal fliers; wings spread horizontally or folded roof 'like on 



abdomen when at rest; antennae usually feather-like 

 Lepidoptera (part) Moths 

 Largely diurnal fliers; wings folded together in vertical position over back 

 when at rest; antennae thread-like and usually knobbed or club shaped 

 at tip 11. 



11. Club on antennae partly or completely recurved 



Lepidoptera (part) , Hesperidae Skippers 

 Club, if present, not recurved 



Lepidoptera (part) Butterflies 



12. With a piercing or sucking beak on underside of head, and not bee- or 



fly-like 



Homoptera Cicadas, Leaf -hoppers, Aphids, etc. 

 (Hemiptera (part) ) 

 With chewing or lapping mouth parts, or else definitely bee- or fly-like 13. 



13. Wings each with not more than seven long veins, and with the front 



wings larger than the back wings; mouth parts evident 14. 



Wings with more long veins, or else with back wings not smaller than 



the front wings 15. 



14. Very small, seldom over Vg"; wings held against sides so as to form a 



steep roof over the back 



Corrodentm, Psocidae Psocid Flies 

 Larger; wings usually laid flat on back 



Hymenoptera Bees, Wasps, Ants, Saw-flies, etc. 



15. Wings with few cross veins 16. 

 Wings with many cross veins 17. 



229 



