1893.] ENTOMOLOGICAL NEWS. 187 



States. In North America, north of Mexico, the Carabidae out- 

 number the Rhynchophora in number of species. 



It seems not improbable that the three obstructing teeth on the 

 rim or lip of the aperture of the shell in the molluscs mentioned 

 by Mr. Pilsby, may serve to protect the occupant from its ene- 

 mies, and, possibly, some of these may be predaceous beetles. 

 But if this be true, there must be another more powerful enemy 

 than predaceous Coleoptera, and one with which the writer of 

 the notice is unacquainted, that causes the peculiar dentition, else 

 the result could not be, as he says, that the highest development 

 appears to the southward, but quite the reverse. 



THE COLEOPTERA OF ALASKA. 



By John Hamilton, M.D., Allegheny, Pa. 



A Catalogue of the Coleoptera of the vast territory of Alaska 

 was commenced near two years ago, and is now approaching 

 completion. The synonymy and distribution of the species are 

 given, and likewise a list of places in Alaska where Coleoptera 

 have been taken, with the longitude and latitude of each place. 

 The following summary may interest entomologists: 



Number of families, 45; number of genera, 251; number of 

 species, 572. Number of species common to both hemispheres, 

 137; number of species occurring in Alaska and other parts of 

 North America, 240; number of species occurring in Alaska and 

 not recorded as occurring elsewhere, 175; number of species im- 

 ported by commerce, 17; number of species doubtfully Alaskan, 

 3; number of species occurring in Northern Asia and Alaska not 

 recorded as occurring in other parts of North America, 33; num- 

 ber of species taken on the coast of Behring Strait and along the 

 lower Yukon, 28; number of species taken on the continent or 

 mainland in Alaska, 60. Many of these occur also in the penin- 

 sulas, islands and other parts of North America, and some of 

 them likewise in Northern Asia. 



In the year A. D. 1853, Prof C. G. Mannerheim completed 

 the publication of a catalogue of all the Alaskan Coleoptera 

 known to him, numbering 540 species; some of these have be- 

 come synonyms of one another — how many, has not been counted. 

 It will be seen that, in the aggregate during the past 40 years. 



