61. Euclnetldae. 



62. Helodldae. . 



63. Chelonaridae 



64. Dermestldae. 



65. Byrrhldae. . 



66. Nosodendrldae 



67. Rhysodldae . 



68. Ostomldae. . 



69. i:itldulldae. 



70. Rhlzophagldae 



71. ronotomldae. 



72. Cucujldae. . 



73. Erotylldae . 



74. Derodontldae 



HOW TO KNOW THE INSEQS 



(6) Wedge shaped; on flowers. 



(22) The Blister beetles. Long, slim, v/lth narrow 

 necks. 



Small family, not found In Iowa. 



Small family of small predacious beetles. 



The Pythenld Bark-beetles. Under bark and stones. 



(4) The Fire-colored Beetles. Usually biack and 

 red; with distinct neck. 



(8) Tree-living beetles. 



(45) The Ant-llke Flower Beetles. Predacious; live 

 on ground. 



Very small; on leaves and flowers. 



Small family of rare beetles. 



Southern habitat. 



Found In south. 



(1) The Cedar Beetles. Antennae flabellate In 

 males . 



(117) The Click Beetles. The adults of wire worms; 

 slim, usually with spines on hind angles of thorax. 



(13) Under bark and on leaves. 



(4) Small family of small beetles resembling the 

 click beetles, 



(66) The Atetalllc Wood-Borers. Look as though 

 made of metal. 



Small family, mostly western; on wood. 



(3) Small water beetles. 

 (6) In damp places. 



(9) The Variegated Mudlovlng Beetles. In damp 

 places. 



The Minute Mudlovlng Beetles. On banks of streams. 



The Soft-bodied Plant Beetles. On plants near 

 water. 



(2) Small family. 



(9) On plants near water. Small beetles. 

 Not in Iowa 



(23) The Skin Beetles. Round or cylindrical and 

 covered with scales. Pests of clothing. Insect 

 collections, etc. 



(4) The Pill Beetles. At roots of trees and grass. 

 Small family, under bark. 



(2) Small. 



(8) The Bark-gnawing Beetles, 

 flattened beetles. 



Mostly black, 

 Oval, somewhat 



(35) The Sap-feeding Beetles, 

 flattened; under bark. 



Under bark, small. 



(3) Small; under bark and in nests of ants. 



(18) The Cucu^ids. Mostly elongate and very flat. 

 Under bark and in grain. 



(20) The Erotylids. Shiny; black and red or blue 

 and red. 



(1) Small family of small brown beetles. 



120 



