INSECTA. 



DIPTERA (contin.) 



IIoMALOPTERA. 



ArilANlITERA. 

 AlTKRA. 



HEMIPTERA. 



Terrestria I. 



_Aquatica 2. 



859 



Anthracidz 



Acrocerida? 



Stratiomydse 



Xylophagidse 



Syrphidse 



Stomoxydz 



Conopidae 



<Kstnds Gad-flu^. 



Muscidx Hoiue-Jiies, ffc. 



\ Hippoboscidac Jig. 350 Forett-Jliet. 

 \ Nycteribidz 



Pulicidx Flea*. 



S Pediculidx, lice. 



J Nirmidz Jig. 351 Bird-lice. 



lInMiirii.it \. 



CLASS INSECTA, (Insects.) 

 Animal Invertebratcd, hexapodous, under- 

 goes metamorphoses. 



Body in general winged, and composed of seg- 

 ments divided into three distinct regions. 

 Skeleton external, formed of the dermal co- 

 verings. 



Antennn two, respiration aerial, sexes distinct. 

 Sub-class 1. MANDIBULATA. 



Order I. COLEOPTERA. 



Wings four, anterior ones (elytra) hard, co- 

 riaceous, covering the abdomen, divided by a 

 longitudinal suture, not employed in flight; 

 posterior ones usually jointed, with their apex 

 acute. Metamorphosis complete. 



The Beetles constitute by far the most nu- 

 merous and varied tribes in any order, and 

 differ as much in habits and size as in general 

 form. They include every variety of confor- 

 mation and bulk from the minute but rapa- 

 cious Staphylinidte, to the gigantic phytopha- 

 gous Dyniatida and Cctoniida:. So numerous 

 are the species that, according to Burmeister,* 

 there are 28,000 in the Berlin collection alone, 

 while the whole that is known is supposed to 

 exceed 36,000. In Mr. Stephens's arrange- 

 ment they have been divided into families 

 which amount to more than one-third of the 

 whole class, and these families are grouped 

 into six sections. The first section includes 

 most of the predaceous beetles, and is divided 



Manual of Entomology (Translation), p. 583. 



Bugi. 

 I Pentatomidx 

 I Coreidae 



S Ueduviidse Masked bugs. 

 I Acanthiidic 

 MIydrometridae Skip-jacks. 



iNepidae Jig. 352 Water-scorp'umt. 

 Notonectidx Water-boatmen. 



pCicadiidx Jig. 353 Tree-happen. 

 \ Cercopidse 

 J Psyllidas 

 J Thripidae 

 I Aphidz Plant-lice. 

 L Coccidse 



into two tribes, Adephaga and Rliypophagn, 

 and these are divided into four sub-tribes. 



The first sub-tribe, Geodephaga, includes the 

 predaceous Ground-beetles, which are cha- 

 racterized by the elegance of their form and 

 alacrity of their movements. They have six 

 projecting palpi,* their mandibles are strong, 

 curved, and pointed, and their legs slender 

 and formed for running, (Jig. 329.) Some of 



Fig. 329. 



Carabus monilis, ( Grmmd-beetlt, male. ) 



* The third pair of palpi arc maxillary, and arc 

 the analogue* of what we shall hereafter describe 

 as the GuUa. 



