CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 283 



Chief Families of the Serricornia Group (Fig 184) : 



A. Head inserted in thorax up to compound eyes. 



B. First two segments of abdomen fused together on ventral side. — • 

 BuprestidcB (Metallic Wood-borers), p. 300. 

 BB. First two segments of abdomen not fused. — Elateridce (Click Beetles), 



P- 293- 

 AA. Head not inserted in thorax up to compound eyes. 



B. Head normal or bent, but partially covered by the margin of thorax. 

 C. Elytra flexible; body elongated and flattened. — Lampyridce (Fire 

 Flies). 

 CC. Elytra firm; body not much flattened. — Cleridce (Checkered 

 Beetles). 



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Fig. 183. 



-Forms of antennae of beetles. 1-9, clavate; 10, 12, 13, lamellate; 11, 

 moniliform. (After Leconte and Horn.) 



BB. Head bent nearly at right angles to thorax; size small. — Plinidce 

 (Death Watch Beetles, etc.), p. 327. 

 Chief Families of the Lamellicornia Group: 



A. Antennae elbowed; lamellae fixed. — Lucanidce (Stag Beetles), p. 318. 

 AA. Antennae not elbowed; lamellae not fixed. — Scarabceidce (Leaf Chafers), p. 302. 

 Chief Families of the Phytophaga Group: 

 A. Body and antennae short. 



B. Front of head prolonged into a broad, quadrate, beak; elytra short; 

 seed eaters. — BruchidcB (Pea-weevils), p. 319. 

 BB. Front of head not prolonged into a beak; elytra long; leaf-eaters. — 

 Chrysomelida (Leaf Beetles), p. 306. 

 AA. Body and antennae long. — Cerambycidm (Long-horned Beetles), p. 320. 

 Chief Families of the Heteromera Group: 



A. Head with distinct neck; body soft and elytra flexible. — Meloidce (Blister 

 Beetles), p. 325. 

 AA. Head without distinct neck; body wall hard. — TenebrionidcB (Darkling 

 Beetles), p. 328. 



