HOW TO KNOW THE INSEOS 



23a Antennae both elbowed and clavate. Hard, usually small, 

 black beetles with truncate (a) elytra. (The Hister Beetles) 

 Fig. 109. Family 23, HISTERIDAE 



Fig. 109. Platysoma depressum Lee. 



Shiny black, much flattened. Common under 

 bark of logs. Length 3-4 mm. 



Other members of this family live under 

 bark and are greatly depressed. Many others 

 live In carrion. They are usually much 

 thickened. A few species have red markings 

 on the elytra. 



^igure 10 9. 



23b Not as in 23a 24 



24a Femora attached to end of 



trochanter or very near the 



end. Fig. 110 25 / C VY^'^^^ ^ 



Fig. 110. c, Coxa; t, tro- "^^^.J? 



chanter; f, femur. 



Figure 110, 



24b Femora attached to side of f /^"^ — ^ 



trochanter. Fig. 111 26 y^ xr_ £ 



Fig. 111. c, Coxa; t, tro- \ ^T"^*^--— JL 



chanter; f, femur. ^-^^ 



Figure 111. 



25a Antennae inserted on the front. Small beetles. (The 

 Deathwatch and Drug-store Beetles.) Fig. 112 



Family 91, PTINIDAE 



Fig. 112. Ptinus brunneus Dufts. 



Pale brown. Clothed v;ith recumbent 

 hairs and erect bristles. An old world 

 species, found in places where meal is 

 stored. Length about 3 mm. 



Judged from human likes and dislikes, 

 some Insects have queer tastes. Some 

 members of this and of the family Anobi - 

 Idae live in drugs and other stored! 

 products seemingly poorly suited for 

 food. 



Figure 112, 



64 



