ZOOLOGY. 199 



This like the preceding genns, cousists of small animals, 

 but they are gifted with very destructive appetites ; some of 

 the species in their larva and perfect state live in dry animal 

 substances, others in old wooden furniture, or amongst 

 books or papers, which they injure by innumerable perfora- 

 tions. 



6. Hister. Tips of the Antennw nearly solid, the lowest joint 



compressed and decurved, plate 3, fig. 5. ; head retrac- 

 tile ; mouth furnished with forceps ; wing-covers short- 

 er than the body ; fore legs toothed. 



C. Gyrynus, Glimmer-Chaffer. Antennw clavate, stiflf, 

 shorter than the head, : plate 3, fig. 6. ; eyes four, two 

 situated above and two beneath the base of the antennse. 



This is an aquatic genus, and in common with all the water 

 Beetles, fly only at night. 



7. Pausus. Antennce oi two joints, the upper very large, 



inflated, hooked, moveable ; plate 3, fig. 7 ; head pro- 

 jecting ; wing-covers flexile, deflected, truncate. 



S. Byrrhus. Anttnnoe clavate, nearly solid, compressed, 

 plate 3, fig. 8. 



Some of the species frequent houses, and are equally inju- 

 rious to furniture and collections, with those of the genus 

 Dermestes ; others frequent gardens, and may be found craw- 

 ling about the stems and leaves of plants. 



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