CLASSIFICATION OF INSECTS. 227 



758. Dermestites (Z)e?7«es<j7e5). Larva some- 

 what shuttle-shaped, very pilose. Inhabits and 

 feeds on decayed and dried animal substances. 

 Pupa changes in the same substances. Imago 

 with short clavated antennae; mandibles short, 

 strong, and toothed ; form oval ; head and legs 

 retractile, but less perfectly so than in the two 

 preceding orders. Inhabits dead animals ; when 

 shaken out or disturbed, mimicking death : flight 

 principally nocturnal. Altagenus, Dermestes, 

 Megatoma. 



759. Ipsites (Ipskes). Larva more elongate, 

 slightly pubescent. Inhabits and feeds on the 

 bark of trees or fungi. Pupa changes in the 

 bark. Imago with clavated antennae, the club 

 not abrupt, but generally formed by a gradual 

 incrassation of the antennae externally ; prothorax 

 nearly square, generally longer than wide ; form 

 elongate : flight only occasional, mostly diurnal, 

 Lyctus, Sylvanus, Rhizophagus, Nemosowa, Ips, 

 Tetratoma, Triplax, Mycetophagus, Anthero- 



phagus. 



760. W\t\A\3\\te& {NitiduUles). Larva pubescent, 

 more active than the preceding. Generally inhabits 

 and feeds on decayed animal substances. Pupa 

 changes in the same situations or in the earth. 

 Imago with clavated antenna;, the club abrupt 

 and well defined, usually composed of three 

 joints : active ; flies readily. Inhabits, in great 

 quantities, decayed animal substances, particularly 



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