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. Tarsi, usually five-jointed, sometimes four or three-jointed in very small species, Blender and sparsely haired, except Tribe XI, and except that the interior, or anterior and middle tarsi are sometimes dilated and brush-like beneath in the males. Elytra covering the whole or nearly the whole of the abdomen. Antennae filiform and simple; outer lobe of ma ills palpiform, giving the appearance of six palpi. Lege long and fitted for running; hind trochantera large, egg-shaped and prominent; tarsi always five-jointed.
Tribe U. Hind legs flattened and fringed for swim ming; trochanters not prominent; the fourth joint of the anterior and middle tarsi sometimes indistinct in very small speciea.
Tribe III. Antenna elevate or capitate. Palpi usually very long, sometimes longer than the short antenna; antenna six to nine jointed, strongly elevate; middle and hind come dilated; middle and hind tarai sometimes fringed; babita aquatic.
Tribe IV. Antenna clavate, but with the club neither pectinate nor lamellate, and nearly or quite filiform in the exceptional group of sub-clavicornea; aize small or very small (except SilphidEe).
Tribe V. Elytra much shortened, usually covering less than half of the abdomen ; antenna more or less month form.
Tribe VI. Palpi not elongated; antenna eleven jointed, rarely ten or nine jointed; coxes not dilated; habits not aquatic. lub of antenna pectinate; mandi bles usually strongly toothed or even branched; size large or medium.
Tribe VII. Club of antenna lamellate; size often large; sometimes small, 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. Antenna filiform and usually serrate; outer lobe of maxilla not palpiform. Prosternurn pro longed to a point behind and received in the mesoster num ; body very firm; lege short; tarsi always five jointed ; joints not dilated and brush-like beneath, but often furnished with membranous lobes on the under side.
Tribe X. Prosternum not prolonged behind. Body moderately firm; legs more or less elongated; tarsi various.
Tribe XI. Body soft, elytra thin and flexible; tarsi usually iomewhSt dilated and brush-like beneath, with the fourth joint bilobed; last joint of palpi sometimes dilated.
Tribe XII. Anterior and middle tarsi five-jointed, hind tarsi four-jointed; the joints slender, aparaely haired or spinons, sometimes silky or pubescent beneath, but never dilated, brush-like and bilobed as in the remain ing sections,_• except sometimes the penultimate joint in parts of Tribes XII and XIII. Head as wide as the
thorax, and attached to it by a neck; body rather soft and elytra flexible; aiitenna filiform sometimes serrate or pectinate; anterior come prominent and contiguous; colors various, and often diversified; larva usually para sitic.
Tribe XIII. Head narrower than the thorax, and usu ally partly inserted in it; body firm; color black or brown, rarely diversified. Antenna filiform; anterior come some what prominent, and nearly or quite contiguous; color mostly brown, sometimes black: I, rya sub-cortical.
Tribe XIV. Antenna sometimes filiform, but usually more or less clavate; anterior cola small, depressed, and never contiguous. Antenna usually moderately and grad ually enlarged towards the tip, but sometimes filiform, and usually as long as the bead and thorax; body oblong; color black or dark metallic; larva mostly terrestri.4.
Tribe XV. Antenna usually short and perfoliate; body short, oval or subquadrate; color brown, or black with red spots, sometimes metallic; larva fungivorous.
Tribe XV1. Tarsi apparently four-jointed, with all the joints. except the last, dilated, brush-like beneath, and with the penultimate joint usually bilobed (except Scoly tida). Head more or less prolonged into a snout or ros trum; antenna usually capitate; larva fructivorous.
Tribe XV1I. Head not prolonged into a snout. An ten a clavate or capitate; tarsi not dilated; form sub cylindrical; size small; color brown or black; larva lig nivorous.
Tribe XV III. Antenna usually filiform or setaceous: scum times slightly widened towards the tip; tarsi always dilated and 1,rush-like beneath, with the penultimate joint usually bilobed. Form elongated; antenna almost always long, and filiform ur setaceous; often as long as the body or longer; size and colors various; larva ligniv °roue.
Tribe XIX. Form short, and more or less oval; an tenna filiform, or a little thickened towards the end, and never much more than half as large as the body; size below medium or small; colors various; larva herbiv orous.
Tribe XX. Tarsi usually apparently three-jointed, sometimes four or five-jointed, the joints dilated and brush-like beneath, with the penultimate joint nsually deeply bilobed; antenna usually strongly clavate, rarely sub-clavate. Form oval or oblong; antenna of moderate length ; colors red and black, usually arranged in large spots or stripes; habits fungivorous.
Tribe XXI. Form rounded, or sub-hemispherical• antenna very short; colors mostly red and black, arranged in dots; habits carnivorous.
As being of interest we give cut showing the largest of our native beetles (Dynasitis tityus, Linn.) a species, however, not injurious. (See, also, Insects, Entomology, and articles under proper names of the species noticed, as injurious or beneficial.)