ZOOLOGY. SOS 



22. Elaior. Antennae setaceous, or pectinated, in some 

 species assuming a fan-like appearance, fig. 18, plate 3, 

 protruding from a groove beneath the head ; bodif 

 oblong, the under side of the thorax terminating in an 

 elastic spine, placed in a cavity of the abdomen : by 

 means of this apparatus, the insect, when placed on iti 

 back, springs up and recoyers its natural position. 



23 Cincidella. Antennce setaceous ; jazas prominenf, 

 toothed ; eyes projecting; ^Aora:c roundish, margined. 



Mest species in this genus are extremely ferocious, devour- 

 ing all other insects that they can overcome ; their usual 

 haunts are dry meadows, and sandy banks ; and are only to 

 be seen on wing during the hottest part of the day, while the 

 sun shines. Their larvae lurks in holes in the sand, and 

 like the perfect insect, devours whatever insects it over- 

 powers. 



14. Bupcrtris. Antenna: slender, serrated, the length of 

 the thorax ; head partly liid beneath the thorax. 



This is a most brilliant genus, many of the species rival- 

 ing in brilliancy the most highly polished gold or copper, 

 they feed on vegetable substances; their larvse is found iu 

 decaying trees, and in timber. 



25. Dyticus. Antennce setaceous ; Ajnrf-/e^* hairy, formed 

 for swimming, and terminated by very minute claws. 



The whol« of this genera are aquatic. 



