so SYNOPTIC KEY 



Class I N S E C T A 



WINGED ADULTS 



Modified from Comstock's Manual for Study of Insects. See 

 also key to orders of commonly observed insects; Lutz, 476. 



N.B. — Elytra or wing covers of earwigs and beetles are modi- 

 fied wings. The last tarsal segment usually bears one or two claws 

 which are not counted as segments. 



1(12) With one pair of wings. 2 



2(7) Wings leathery or parchment-lil^e. 3 



3(4) Mouth parts formed for sucking. Wings leathery, 

 shortened, or membranous at the tip. (Comstock, 

 121; Lutz, 80.) Order Hemiptera 



4(3) Mouth parts formed for biting; jaws distinct. 5 



5(6) Wings horny without apparent veins. Hind legs not 

 fitted for jumping. (Comstock, 494; Lutz, 280.) 



Order Coleoptera 



6(5) Wings parchment-like with a network of veins; hind 

 legs fitted for jumping. (Comstock, 104; Lutz, 62.) 



Order Orthoptera 



7(2) Wings membranous. 8 



8(11) Abdomen with caudal filaments; mouth parts rudi- 

 mentary. 9 



9(10) Halteres wanting. (Comstock, 86; Lutz, 40) 



Order Plectoptera or Ephemerida 



10(9) Halteres present (males of scale insects). (Comstock, 

 121; Lutz, 91.) Order Hemiptera 



11(8) Abdomen without caudal filaments. Halteres in 

 place of second wings. Sucking mouth parts. (Com- 

 stock, 413; Lutz, 229.) Order Diptera 



