284 



ECONOMIC ENTOMOLOGY 



Chief Genera of the Rhyncophora Group: 



B. Beak short and broad; antennae short, geniculate and clubbed; tibias 

 often with several teeth externally; head narrower than prothorax; 

 eyes oval, emarginate or divided; first tarsal joint much shorter than 

 combined length of the others. — Ipidce (Bark Beetles), p. 339. 

 BB. Beak usually long and well developed; palpi small and concealed; 

 antennae usually clubbed; tibiae without teeth externally; submentum 

 produced into a gular peduncle. 

 C. Dorsum of last segment of male divided transversely. 



D. Mandibles with a scar on anterior aspect. — Oliorhynchida, 



P- 3Z(>- 

 DD. Mandibles without scar on anterior aspect. — Curciilionida 

 (Curculios), p. 329. 

 CC. Dorsum of last segment of both sexes undivided; tibiae not 

 serrated. — Calandrida (Grain Weevils), p. 337. 



^^J««rfI3 



Fig. 184. — Serrate antennge and modifications: i, serrate; 2, pectinate; 3. bi- 

 pectinate; 4, flabellate; 5, plumose; 6, 7, 8, irregularly serrate, approaching the 

 clavicorn type. {After Leconte and Horn.) 



CICINDELIDiE (TIGER BEETLES) 



Tiger beetles, both adult and larvae, are predaceous, feeding upon 

 caterpillars and other unwary insects. The adults are active, alert 

 creatures, and are most commonly observed on sandy grounds and 

 roads. They are brilliantly marked with metallic colors. 



The larvae live in vertical burrows and there lie in wait for their 

 prey. They have strong jaws and large dirt-colored heads, and 

 the fifth abdominal segment bears a hump with two backward-curved 

 hooks which serve to anchor their owners in the burrows. 



The majority of the species belong to the genus Cicindela, and the 

 most abundant forms are C. sexguttata Fab., C. vulgaris Say, C. repanda 

 Dej., C. hirticollis Say, and C. punctulata Oliv. 



