BEETLES. The common name of the larger coleopterous insects, having hard wing-cases. The late Dr. Le Baron, iu his Fourth Entomo logical Report for the State of Illinois, gives a synopsis of the tribes of the eoleoptera, which will be of value to the reader as a means of identification. The tribes of beetles are as fol lows: The synopsis of the tribes of the coleoptera is as follows: Tribe I. Tarai, nanally five-jointed, sometimes four or in very small species, Blender and sparsely haired, except Tribe XI, and except that the interior, or anterior and middle tarsi aro sometimes dilated and brush-like beneath in the males. Elytra covering the whole or nearly the whole of the abdomen. Antennae filiform and simple; muter lobe of ma illEe palpiform, giving the appearance of eix palpi. Lege long and fitted for running; hind trochanters large, egg-shaped and prominent; tarsi always five-jointed.
Tribe II. Hind legs flattened and fringed for swim ming; trochanters not prominent; the fourth joint of the. anterior and middle tarai sometimes indistinct in very small speciea.
Tribe III. Antennae elevate or capitate. Palpi usually very long, sometimea longer than the short antennte; antennae six to nine jointed, strongly elevate: middle and hind coxes dilated; middle and hind tarai sometimes fringed; b.ibita aquatic.
Tribe IV. Antennae elevate, but witb the club neither pectinate nor lamellate, and nearly or quite filiform in the exceptional group of sub-clavicornes; aize email or very small (except SilphidEe).
Tribe V. Elytra much shortened, nsually covering lesa than half of the abdomen ; antennae more or less monili form.
Tribe VI. Palpi not elongated; antennw eleven jointed, rarely ten or nine jointed; coxEe nut dilated; habita not aquatic. lub of antennw pectinate; mandi blea uaually strongly toothed or even branched; size large or medium.
Tribe VII. Club of antennae lamellate; size often large; aometimea email, but never very small. Abdomen wholly covered by the elytra (except Copricke); bind legs set far back.
Tribe VIII. Tip of abdomen exposed; hind legs not set far back.
Tribe IX. Antennae filiform and usually serrate; outer lobe of maxillae not palpiforrn. Prosternurn pro longed to a point behind and received in the mesoster num; body very firm; lege short; tarsi alwaya five jointed ; juinta not dilated and brush-like bencatb, but often furnished with membranous lobes on the under aide.
Tribe X. Prosternum not prolonged behind. Body moderately firm; legs more or lesa elongated; tarsi varioue.
Tribe XI. Body soft, elytra thin and flexible; tarsi uaually omewhat dilated and brush-like beneath, with the fourth joint bilobed; last joint of palpi sometimes dilated.
Tribe XII. Anterior and middle tarsi five-jointed, bind tarsi four-jointed; the joints slender, aparaely haired -or spinons, sometimes silky or pubescent beneath, bnt never dilated, hrush-like and brtobed as in the remain ing sections,_• except sometimes the penultimate joint in parte of Tribes XII and XIII. Head as wide as the
thorax, and attached to it by a neck; body rather soft and elytra flexible; Etittemix filiform sometimes serrate or pectinate; anterior cox* prominent and contiguous; colora various, and often diveraified; larvw usually para sitic.
Tribe XIII. Head narrower than the thorax, and nen ally partly inserted in it: body firm; color black or brown, rarely diversified. Antennae filiform; anterior come some what prominent, and nearly or quite contiguous; color moody brown, sometimes black: 1, rvm sub-cortical.
Tribe XIV. Antennw sometimea filiform, but usually more or lege elevate; anterior col small, depressed, and never contiguous. Antennae usually moderately and gra& nally enlarged towards the tip, but sometimes filiform, and uaually aa long as the head and thorax; body oblong; color black or dark metallic; larvae mostly terrestri.4.
Ttibe XV. Antennae usually short and perfoliate; body short, oval or subquadrate; color brown, or black with red spots, sometimes metallic; larvte fungivorous.
Tribe XVI. Tarsi apparently four-jointed, with all the joints. except tbe last, dilated, brush-like beneath, and with the penultimate joint naually bilobed (except Scoly tidEe), Head more or less prolonged into a anout or roa trum; antennae usually capitate; larvae fructivorous.
Tribe XVII. Head not prolonged into a snout. An ten Łe elevate or capitate; tarsi not dilated; form sub cylindrical; size small; color brown or black; larvae lig nivorous.
Tribe XVIII. Antennae usually filiform or setaceous: scant times slightly widened towards the tip; tarsi always dilated and 1,rush-like beneath, with the penultimate joint usually bilobed. Form elongated; antennae ahnoat always long, and filiform ur setaceous; often as long as the body or longer; size and colors variona; larvae ligniv °roue.
Tribe XIX. Form short, and more or lesa oval; IIII tennze filiform, or a little thickened towards the end, and never much more than half aa large as the body; size below medium or small; colors various; larvae herbiv orous.
Tribe XX. Tarsi usually apparently three-jointed, sometimes four or five-jointed, the joints dilated and brnsh-like beneath, with the penultimate joint nsually deeply bilobed; antentue usually strongly clavate, rarely sub-clavate. Form oval or oblong; antenum of moderate length; colors red and black, usually arranged in large spots or stripes; habits fungivorous.
Tribe XXI. Form rounded, or sub-hemispberical; antennEe very short; colors mostly red aud black, arranged in dots; habits carnivorous.
As being of interest we give cut showing the largest of our native beetles (Dynasitie tityue, Linn.) a species, however, not injurious. (See, also, Insects, Entomology, and articles under proper names of the species noticed, as injurious or beneficial.)