HOW TO KNOW THE INSECS 



6a Head including eyes wider than the thorax. t^ Antennae In- 

 serted on the front above the base of the mandibles. (Tiger 





CICINDELIDAE 



Figure 87. 



Fami I v 1, 



Clclndela repanda DeJ. 



Brownish-bronze with white markings-. Under- 

 parts and legs greenish. Common on sandy banks 

 of streams. Length 12-13 mm. 



Some of the most beautiful beetles belong to 

 this family. It Is real sport to catch them. 

 They are boi*n hunters and know the tricks of 

 the game. Often one must put them to flight 

 to locate them, their protective coloration Is 

 so good. Then the beetle lights several feet 

 In advance, but always facing the pursuer, 

 ready to fly again as the latter approaches 

 striking distance. Even when In the net they 

 do not give up the fight but frequently escape. 

 When fish fall to bite or game Is scarce, try 

 catching tiger beetles for a real thrill. 



6b Head narrower than the thorax 7 



7a Antennae ten-jointed. Hind coxae forming large plates. 

 Small aquatic beetles with slender crawling legs, sometimes 

 delicately fringed with hairs. (Crawling Water Beetles) Figs. 

 88 and 93. Family 5, HALIPLIDAE 



Fig. 88. Hallplus triopsis Say 



Light brown yellow; spots on elytra black. 

 In quiet v/aters. Length about 3.5 mm. 



Our members of this family are all quite 

 small. Although living In water, they are 

 feeble swimmers. They are frequently found 

 well below the surface. A fine water net and 

 some good patience is necessary to get many 

 of them. 



Figure 



7b Antennae eleven-jointed 8 



8a Beetles of round convex form. Not over 8 mm. in length. 

 Scutellum concealed. Presternum scoop-shaped, entirely cov- 

 ering the metasternum. Fig. 89. 



Family 4, OMOPHRONIDAE 

 Fig. 89. Omophron tessellatum Say 



Pale brownish yellow; with metallic green 

 markings. Found under debris and buried in 

 sand at edge of -watercourses. Length 6-7 mm.. 



These were formerly Included with the 

 ground beetles. It is a small family and 

 has only the one genus. 



Figure 89. 



* See Foot-note p. 58. 

 57 



