EBERIIART'S KEY TO THE FAMILIES OP INSECTS. 



HETEROPTERA. 



A. Tarsi of middle legs, 2-jointed. Aquatic or sub-aquatic species. 

 a. Tarsi of front legs, 1-jointed. 



au. Hind legs greatly elongated, and strongly fringed with hair. 



aaa. Eyes on a stem ; antennas small and concealed. 



aaaa. Eyes not pedunculated; antennas small and slender. 



NoTONECTID.E. 



galgulid/e. 

 Hydrometrid.k. 



AA. Species wholly terrestrial (living on the land). 

 b. Beak short and 3-jointed. 



c. Rostrum (beak) fitting in a cavity or trough; body oval and depreesed; last joints 

 of antennas not thinner than the preceding ones. 



Tingid.e. 



cc. Rostrum naked; head behind narrowed into a more or less elongated neck. 



REDUVIIDjE. 



bb. Beak 4-jointed. 



d. Scutellum large and reaching as far as the middle of the abdomen, often 

 farther. 



SCUTELLERID^E. 



dd. Scutellum ordinary. 



e. Antennas on or below a line from eyes to base of beak ; ocelli usually 

 absent. 

 /. Second joint of antennas often enlarged at tip; terminal joint 

 thinner than preceding: ocelli always absent. 



Capsid^e. 



.//'. Last joints of antennas not thinner than preceding, but not 

 clavated (clubbed). Body usually narrow; ocelli sometimes 

 present. 



IjYQJEWJE. 



ee. Antennas above line from eyes to base of rostrum; ocelli 

 present. 



CoREIDiE. 



A KEY TO THE PRINCIPAL FAMILIES OF COLEOPTERA* 



A. All of the tarsi usually 5-jointed. 



a. Elytra extending to, or nearly to, the tip of the abdomen. 



b. Apparently 6 palpi, through the outer lobe of the maxillas being palpiform. Antennas 

 filiform and simple, 

 c. Legs adapted to running; hind trochanters egg-shaped ; large and conspicuous. 

 d. Head vertical and broader than the thorax; jaws with prominent teeth; 

 generally gaily colored species. 



Cicindelida: {Tiger-beetles). 



►Arranged from Le Baron. The technical names may be understood by referring to f rontia piece. 



