48 OBDEHS. 



They are the most numerous and best known f 

 all insects. They are easily preserved, and make 

 a beautiful appearance in cases under glass. 



Examples. Cicindela, carabus, dytiscus, gyri- 

 Mus, elater or taupin (the snap-bug) ptinus, bister, 

 silpha, dermestes, (leather-chaffer) hydrophilus, 

 (diver) scarabeus, (beetle) lytta, (blistering fly) 

 cerambyx, (goat-chaffer) coccinella, (lady-bird.) 



6. ORTHOPTERA, strait-winged. Having four 

 wings ; the outer pair being generally coriaceous, 

 and the inner pair pcaited longitudinally. 



Their mandibles and jaws formed for mastica- 

 tion. They are all dry-land insects. 



Examples. Forficula, (ear-wig) blatta, (cock- 

 roach) mantis, (soothsayer) phasma, (spectre) 

 phyllum, (walking-leaf) gryllus, (grass-hopper 

 locust.) 



7. HEMIPTERA, half-winged. Having four 

 wings ; the upper part of the outer pair generally 

 crustaceans, and the lower part membranaceoits, and 

 almost always crossing each other. 



They have no jaws, but a sucking beak. 



Examples. Cimrx, (bug) nepa, (water-scor- 

 pion) notoriecta, (boat-fly) fulgora, (fire-fly) thrips, 

 aphis, (plant-louse) coccus, (cochineal.) 



8. NEUROPTERA, nerve-winged. Having four 

 nuked membranaceous wings, finely reticulated ; the 

 inner pair as large as the outer ; or larger one way. 



Their mandibles and jaws are formed for mas- 

 tication. Outer and inner wings alike. 



Examples. Ephemera, (day-fly) panorpa, 

 (scorpion-fly) myrmeleon, (lion-ant) hemerobius, 

 (golden eye) raphidia, termes, (ticking insect) 

 phryganea, (cadow-fly.) 



