. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. THE MAMMAL NEST BEETLES. 271 coarsely punctured than thorax, the punctures not distant one from an- other more than their own diameter. Length 3-i mm. Lake, Marshall, Starke, Kosciusko and Steuben counties; fre- quent. May 20-October 26. Family VII. LEPTINID^. JIammal Nest Beetles. This family is represented in Indiana by a single small, flat beetle, having the antennae slender and 11-jointed; eyes entirely
. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. THE MAMMAL NEST BEETLES. 271 coarsely punctured than thorax, the punctures not distant one from an- other more than their own diameter. Length 3-i mm. Lake, Marshall, Starke, Kosciusko and Steuben counties; fre- quent. May 20-October 26. Family VII. LEPTINID^. JIammal Nest Beetles. This family is represented in Indiana by a single small, flat beetle, having the antennae slender and 11-jointed; eyes entirely wanting; thorax with apex truncate, base covering the base of elytra and broadly emarginate, without distinct side pieces beneath; scu- tellum distinct; elytra rounded at tip, covering the abdomen; front coxae small, globular, not separated by the prosternum; hind coxse narrow, transverse, meeting at middle; legs short, tibi» flattened, tarsi 5-jointed. But two species of the family are known from North America. One inhabits the Hudson Bay region; the other is common to both Europe and America and lives with small rodents and insectivora, such as mice, moles, shrews, etc., and also in the nests of bumble-bees. If the nest of a mouse or shrew be carefully removed from beneath a log or other shelter and shaken over a paper, a number of these little beetles will probably be seen scampering away as fast as their legs will carry them. Chas. Dury, of Cincinnati, took 90 specimens of the beetle from one nest and many others es- caped before he could gather them in. As to whether they are para- sites or guests of their hosts is still a mooted question, but Dury states, and my observation bears out his supposition, that he thinks them "only guests of the animals, as I have found them in nests that have long since been ; It is possible that they may live upon the eggs and young of the mites, fleas and other forms of life found associated with them in the nests. It is
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1910
