. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. HKTEHOCKUIDAE. 117 Li'Tiiocuua. Hoily romidtHl ; antenna? diHtant, club slender. Body oblong, elongate ; Auteuniu approximate, second joint moderate, club pectinate. rELONDMUS. Anttiuuffi diistaut, second joint much dilated, club lamellate. IIeliliii'u. Lulrochua lutcns is found in Texas; Pclonomus obscurua in tlie Soulheni and Western Stutes; llelicliUH is widely distributed, and is I'nuiid elinii;inj^ to stones underwater, in rapid streams; I lie other two genera are found ut the
. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. HKTEHOCKUIDAE. 117 Li'Tiiocuua. Hoily romidtHl ; antenna? diHtant, club slender. Body oblong, elongate ; Auteuniu approximate, second joint moderate, club pectinate. rELONDMUS. Anttiuuffi diistaut, second joint much dilated, club lamellate. IIeliliii'u. Lulrochua lutcns is found in Texas; Pclonomus obscurua in tlie Soulheni and Western Stutes; llelicliUH is widely distributed, and is I'nuiid elinii;inj^ to stones underwater, in rapid streams; I lie other two genera are found ut the unirgiu of slreatus, under stouus, «!^c. Sub-Family III.âELMIDAE. The anterior coxic are rounded, witliout troehantin; the abdo- men has iivo ventral segments, the lifth rounded at tip; the front is not prominent; the palpi are short; the antenna) inserted upon the front, near the eyes, slender, slightly thickened externally; middle eoxiu widely distant; posterior coxas separated, transverse, not dilated into a plate protecting the thighs; legs exceedingly long; side pieces of the melathorax narrow, epimera not visible; epipleurie narrow, extending to the apex. These insects are oidy found adhering to stones or plants be- neath the surface of the water; the larvie are similar in form to those of the other sub-families, except that the segments are not united to the margin, whicli thus appears incised. Head protected beneath by a lobe of the proateruum; Antenna' ll-jointed; Anterior tibiie pubescent internally. LiMNirs. Anterior tibiae glabrous internally. Stesklmis. Antenme G-jointed. Machos vcuua. liead free ; proateruum not lobed beueatU ; antemise 11-joiuted. No species of this sub-family lias occurred in our fauna, except in the Atlantic district. Fam. XXX.âheteroceridae. Mentum large, oblong, deeply emarginate in front; ligula coriaceous, prominent, bilobed, without paraglossai; palpi iJ jointed, moderately long. I'y-J ;'â¢'t' ;',.';;',.f.'
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Keywords: ., bookauthorlecontejohnljohnlawre, bookcentury1800, bookdecade1860
