THE AXDIAL LIFP: OF TIIK GROrP. 417 



discussed elseAvliero. at'c pi-acticjilly ,ill iiiti'odnccd si)e('ies, hronght to llMwaii 

 on aeeoiint of their well-known pi'edaceous ha hits. The dermestes,-^ the eoni- 

 nion forms introduced and Avhich destroy lioiisdiold stores and p'oods, have 

 also native species of small size. The hislcrid lu'ctles-"* have several intro- 

 duced species and an important Hawaiian ^cnns with thirty or foi'ty sjjccies 

 of very small square-shaped hectics that occnr ahoiit (h'cayiny matter in the 

 mountains. The nitidulids,-'-' a fainil_\- eonipctsed of small Hattened beetles with 

 the wing covers more or less truncate, exposing the ahdomen, suggesting the 

 rove-beetles which have a much h)nger ahdomen, are (jnite common: one hun- 

 dred and forty species, all of which feed on decaying animal and veizctahle 

 matter, and are often found about flowers, occur in the mountains. 



Several other families made up of small-sized individuals and a limited 

 number of species, belong in this division, and may occasionally he captured by 

 the careful collector. 



The group known as the serricorn beetles, since the antennae are usually 

 saw-like, is well represented by three families, the most extensive and comnion 

 ■being the click-beetles,^*^ snapping-bugs or skip-.iack beetles. If disturbed 

 they curl up their legs and apparently drop dead, usually landing on the 

 ground on their backs. With a sudden click, they will si)ring \\\) in the aii- 

 and turn over. If they strike the ground on their feet they Avill run: if not. 

 the clicking performance is repeated again and a^aiii. The adults are usually 

 dull-colored, but some are of fair size and quite common. The larva' are com- 

 monly known as wire-worms. Eighty-five species or more belong to the genus 

 Eopriilhrs, a genus that includes some beautiful irridescent species that num- 

 bers among them some of the most attractive beetles in the islands. The 

 checkered beetles, ^^ with three widely-distributed species, and the metallic 

 wood-borers,"^- inclndinL:' two introduced species, conclude tliis part of the 

 order. 



Beetles with the antennjv arranged so that the outer joints are pi-olonged 

 internally in a manner to present flattened surfaces to each otluM-. are grou]ied 

 under the lamellieorn beetles, and are represented in Hawaii by such well- 

 known families as the stag-beetles ^^ or pinch bugs, so called on account of 

 their large niandil)les. The rare genus Apfrrocuclus. includiiiL; the seven 

 species of the family occurring in Hawaii, is found only on the Island of Kauai. 



All of the eight or more species of Scarabu-ids •'* belonging to the fore- 

 going section, and including such widely-dist ril)uted forms as the -lapanese 

 beetle,-'"' have been introduced. Othei' nuMnbers of this extensive family, in- 

 cluding such classic forms as the May beetle, tuiiible-bugs, dung-beetles, skin 

 beetles and the like, may accidentally gain aduuttance here from tim.' to time, 

 as two dozen species of beetles were prevented from landing in liU'J oidy 

 through the rigorous insect inspection in force in Hawaii. 



The grou]) ■'•'■' including the long-horiu'tl beetles-'" is well i-epresented by 



^- Drrmfstidw ^'' Ilisteridir. -» Mtidiilida: ^o Elatfrida: 3i cieridn: '^'^ Biipiriitidd: 



■■^^ Liiriinula-. '■>* Sc(trab(vid(P. »'■ Adoretim trunimactilatiiti. «" P hi/to phnrja. ^- (fiambyctdcc. 



