612 BIOLOGY. 



Fam. 4. Neuropteroid Beetles Water -beetles. 



Like the following, but all three parts of the body 

 closely annexed, and rudder-like fringes of hairs upon the 

 feet Parnidae, Hydrophilidae, Dyticidae. 



Fam. 5. Orthopteroid Beetles Prcedatoria. 



Maxillae very large and pointed, antennae setiform, 

 wings hard and tolerably flat like the body, tarsi mostly 

 pentameral. Raub- Lauf- and Sandkafer. 



Fam. 6. Hemipteroid Beetles Parasitica. 



Body pretty cylindrical, head rounded with moderate 

 sized maxillae, elytra narrow and soft, tarsi penta- and 

 heteromeral. 



They hang as larvae like Mites to other beetles, and 

 suck them ; but after the metamorphosis they live upon 

 leaves and flowers Lampyridae and Cantharidae. 



Order 9. Ceratopteroid Beetles Rypopliaga. 



3529. Body quadripeltate and mostly short, with hard 

 elytra, thorax large, head small, with short claviform 

 antennae and blunt maxillary teeth ; feet mostly furnished 

 with ungues, tarsal joints varied. Their habitation is 

 very varied, being both free and concealed, and they live 

 for the greatest part on decaying excrementitious mat- 

 ters, such as fungi, dry rot, and even animal ordure. 



Fam. 7. Pliytopliagoid hecrophaga. 



Body mostly rounded, with hard and large elytra ; 

 antennae claviform; tarsi tri- tetra- and pentameral 

 Lycoperdinae, Erotyli, Coccinellidae, Byrrhidae, Dermes- 

 tidae, Sylphidae. They correspond to the Worms and 

 Tracheopterous insects. 



Fam. 8. Zoopliagoid Mulmkafer. 



Body elongated and also nearly spherical, mostly of a 

 dark spotted colour, with hard elytra, thorax rounded, 

 head retractile, palpi filiform, tarsal joints heteromeral 

 or unequal in number Helopidae, Diaperidse, Tene- 

 brionidae, and Pimeliariae. 



They live usually in dark situations, eating meal and 

 dry-rot ; have an unpleasant smell. They correspond to 

 the Crabs, Wood-lice, and Spiders, as likewise to the 

 Dictyoptera. 



