BEETLES. The common name of the larger coleopterous insects, having hard wing-cases. The late Dr, Le Baron, in his Fourth Entomo logical Report for the State of Illinois, gives a synopsis of the tribes of the coleoptera, 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, gender and sparsely haired, except Tribe XI, and eicept that the interior, or anterior and middle tarsi aro sometimes dilated and brualf-like beneath in the males. Elytra covering the whole or nearly the whole of the abdomen. Antenna filiform and simple; outer lobe of, ma Mae palpiform, giving the appearance of six palpi. Legs 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 trochanters not prominent; the fourth joint of the anterior and middle tarsi sometimes indistinct in very small species.
Tribe III. Antenna elevate or capitate. Palpi usually very long,. sometimes longer than the short antenna; antenna six to nine jointed, strongly clavate: middle and hind coxes dilated; middle and hind tarsi sometimes fringed; aquatic.
Tribe IV. Antennae elevate, but with the club neither pectinate nor lamellate, and nearly or quite filiform in the exceptional group of sub-clavicornes; size, small or very small (except Silphidte).
Tribe V. Elytra much shortened, usually covering less than half of the abdomen; antenna more or lees monili form.
Tribe VI. Palpi not elongated ; antenna eleven jointed, rarely tenor' nine jointed; come not dilated; habits not aquatic. lob 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 e'ytra (except Copridae); hind legs set far back.
Tribe VIII. Tip of abdomen exposed; hind legs not set far back.
Tribe J.X. Antenna filiform and usually serrate; outer lobe of maxilla not palpiform. Prosternum pro longed to a point behind and received in the meseater 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; • lege more or less elongated; tarsi various.
Tribe XT. Body soft, elytra thin and flexible; tarsi usually t omewhet dilated and b•ush-like beneath, witk the fourth joint bilobed; last joint of palpi sometimes dilated.
Tribe XII. Anterior and middle tarsi flve-jointed, hind tarsi /four-jointed; the joints slender, sparsely haired nt apinous, sometimes silky or pubescent beneath, but,– never dilated, brush-like and bilobed as in the ing sections; except sometimes the penultimate joi in parts of Tribes XII and XIII. Head as wide es tint
thorax, and attached to it by i neck; body rather soft line elytra flexible; aitennre Sliform sometimes serrate or pectinate; anterior COXie prominent and contiguous; colors various, and of ten diversified; larva usually para sitic.
Tribe XIII. Head narrower than the thorax, and nen ally partly inserted iu it; body firm; color black or brown, rarely diveralfied. Antenna filiform; anterior coxte some what prominent, and nearly or quite contiguous; color mostly brown, sometimes black; 1 rva sub-cortical.
Tribe XIV. Antenna sometimes filiform, but usually more or less clavate; anterior a small, depressed, and never contiguous. Antenna usually moderately and grad ually enlarged towards the tip. but sometimes filiform, and usually as long as the head and thorax; body oblong; color black or dark metallic; larva mostly terrestrial.
Tribe XV. antenna usually short and perfeliate; body short, oval or subquadrate; color brown, or black with red spots, sometimes metallic; larva f ungiverous.
Tribe XVI. 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 lees prolonged into a anent or ros trum; antenna usually capitate; larva fructivorona.
Tribe XVII. Head not prolonged into a An ten a elevate or capitate; tarsi not dilated; form sub. cylindrical; else small; color brown or black; larva big mvorous.
Tribe XVIII. Antenna usually filiform or setaceene: scum times slightly widened towards the tip; tarsi always dilated and brnah-like beneath, with the penultimate joint usually bilobed. Form elongated; antenna almost always long, and flliform or aetaceous ; often as long WI the body or longer; size and colors various; larva 1%111.
01'011S.
Tribe X1X. 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 , MOM.
Tribe XX. Tarsi usually apparently three jointed. sometimes four or five-jointed, the joints dilated and biush-like beneath, with the penultimate joint usually deeply bilobed; antenna usually strongly elevate, 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• antennae very abort; 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.) n species, however, not injurious. (See, also, Insects, Entomology, and articles under proper names of the species noticed, as injurious or beneficial.)