1891.] ENTOMOLOGICAL NEWS. 69 



6. Plectoptera (plaited wings). Mouth-parts nearly obsolete. Wings 

 net-veined; hind pair small, sometimes wanting. Abdomen ending in 

 three filaments. Larvae aquatic, witli large jaws and with gills on the 

 sides of the hind body. Mayfly, Ephemera. 



7. Thysanoptera (fringe wings). Mouth-parts forming a short conical 

 sucker; palpi present; wings narrow, net-veined, fringed; feet bulbous at 

 the end, without claws. Thrips. 



8. Hemiptera. Mouth-parts forming a sucking beak. Prothorax usually 

 large; fore wings often thickened at base.. Louse, Pediculus; Scale insect, 

 Coccus; Plant louse, Aphis; Cicada; Chinchbug, Blissus; Squashbug, 

 Anasa; Bedbug, (Cimex), Acanthia. 



Series II. METABOLA. Metamorphosis complete. 



9. Neuroptera. Wings net-veined; mouth-parts free, adapted for biting; 

 ligula large, rounded; pronotum large, square. Larvae often aquatic. 

 Corydalis. Lacewing fly, Chrysopa; Ant lion, Myrmeleon. 



10. Mecoptera (length wings). Wings somewhat net-veined or absent; 

 head lengthened into a beak-like projection. Larvae like caterpillars. 

 Scorpion fly, Panorpa. 



n. Trichoptera (hair wings). Wings and body like those of Tineid 

 moths [clothed with hairs]; mandibles obsolete in the imago. Larvae 

 usually aquatic, living in cases. Caddis fly, Phryganea. 



12. Coleoptera. Fore wings thick, ensheathing the hinder pair, which 

 are alone used in flight; mouth-parts free, adapted for biting. Beetles, 

 Carabus, Cicindela, Scarabczus; Weevil, Curculio; Chrysomela; Lady- 

 bird, Coccinella. 



13. Siphonaptera 'tube, without wings). Wingless; mouth-parts adapted 

 for sucking. Larvae maggot-like, but with a well developed head and 

 mouth-parts. Flea, Pulex. 



J4. Diptera. Only two wings; mouth-parts adapted for lapping and 

 sucking. Mosquito, Culex; Housefly, Musca; Horsefly, Tabanns. 



15. Lepidoptera. Body and wings covered with scales; maxillae length- 

 ened into a very long tongue. Larvae (caterpillars) with abdominal legs. 

 Butterfly, Papilio; Moths, Sphinx, Bombyx, Noctua, Phala:na, Tinea. 



16. Hymenoptera. Wings clear, with few veins; mouth-parts with a va- 

 riety of functions, i.e., biting, lapping liquids, etc. In the higher families 

 the thorax consists of four segments, the first abdominal segment of the 

 larva being transferred to the thorax in the pupa and imago. Honey Bee, 

 Apis; Wasp, Vespa; Ant, Formica; Ichneumonfly, Ichneumon; Gallfly, 

 Cynips; Sawfly, Tenthredo. 



The correspondence of these orders to those of Prof. Comstock is as 

 follows; i, 8, 12, 15 and 16 to the similarly named orders; 2 and 3 to the 

 Orthoptera; 4, 5 and 6 to the Pseudoneuroptera; 7 to the Physopoda; 9, 

 10 and ii to the Neuroptera; 13 and 14 to the Diptera. 



