HOW TO KNOW THE INSECTS 



98. Trogldae . . 



99. Lucanldae. . 



100. Passalidae . 



101. Cerambycldae 



102. Chrysomelldae 



103. L^ylabrldae . 



104. Brentidae. . 



105. Belldae. . . 



106. Platystomldae 



(18) Very small, yellowish brown; In fungi. 

 Small family; on flowers and fruits. 



(9) The Hairy Fungus-beetles. Elongate; In fungi 

 and under bark. 



(8) Small, dark; In fungi and dead wood. 



(1) Small, oval. 

 Not found In Iowa. 



(17) Very small; under bark and stones. 



(2) Small family. 



(6) The Handsome Fungus Beetles. In fungi or 

 under bark. 



(6) Shining Flower Beetles. Very small; convex; 

 on flowers and under bark. 



(46) The Lady-Beetles . Feed on aphlds and scale 

 Insects. 



(7) The Comb-clawed Bark Beetles. Elongate, brown, 

 without spots. 



(57) The Darkling Beetles. Mostly medium to large; 

 black or gray. 



(3) The Lagrlld Bark-beetles. Elongate, often 

 metallic. 



Not In Iowa; In bark. 



(22) The Melandryld Bark Beetles. Under bark and 

 In fungi . 



(17) The Drug Store Beetles. Small pests of 

 stored provisions. 



The Death Watch Beet os. Very small, mostly 

 cylindrical; In wood. 



(10) The Powder Post Beetles. Cylindrical, dark; 

 In dry wood. 



(3) Dark, head prominent; bore In wood. 



(2) Small species In dry fungi on trees and logs. 



(4) Very small. In bark of trees. 



(146) The Lamelllcorn Beetles. Dung beetles. May 

 beetles, etc. 



The Skin Beetles. Dark colored, roughened; feed 

 on dried animal matter. 



(9) The Stag-Beetles. Large, pinching jaws. 



(1) Shiny black, large, flattened; In decaying 

 wood. 



(151) The Long-homed Beetles. Cylindrical long 

 antennae, often brightly colored; larvae bore in 

 wood. 



(253) The Leaf Beetles. Usually thickened oval 

 forms feeding both as adults and larvae on plants. 



(11) The Bean »i/eevlls; in seeds of leguminous 

 plants. 



(1) The Primitive Weevils. Long cylindrical, 

 males with heavy, blunt Jaws. 



(I) The New York Weevil. But one species in Iowa; 

 damages fruit trees. 



(II) The Fungus Weevils. 



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