File:Annual report on the noxious insects of the State of Illinois (1867) (19180333720).jpg

Title: Annual report on the noxious insects of the State of Illinois
Identifier: annualreportonno14186718743illi (find matches)
Year: 1867 (1860s)
Authors: Illinois State Entomologist
Subjects: Insect pests; Beneficial insects; Insects
Publisher: Chicago : Prairie Farmer Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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G4 THE ORDER OF COLEOPTERA. posed of a little lamella or plate, supi)orted at the end of a slender foot- stalk, and ornamented with a fringe of long hairs. In some the wiugs are wanting. The elytra are sometimes truncated. The club of the antennPB is usually four, rarely two jointed. The tarsi are only three jointed, with a club-tipt bristle between the claws. The surface is often pubescent. Some liv-e in rotten wood and others in manure; a few have been found in ants' nests. Thirty-eight N. American species have been described. Family XVIII. SCYDM^NID^. This is another family of very small insects, found under stones or in waste matter, and in ants' nests. They are of a brown color, and are clothed with erect hairs. They are frequently seen flying in twilight. They are very easily distinguished from the small beetles of the three preceding families, by their more oblong ovate form, by the head sepa rated from the pro-thorax by a distinct neck, and by their large abdo- mens, much wider than the somewhat egg-shaped thorax. They bear the closest relationship to the more extensive family of Pselaphid;Te, treated of below, from which, however, they are strongly separated by their five jointed tarsi, and their elytra covering the whole abdomen. Thirty-eight N. A. species already described. Family XIX. TROGOSITID.E. Founded upon the genus Trogosita, of Olivier, a name composed of the Greek words trogo—to eat, and sitos—grain, and originally applied to the most notorious species, the Trogosita inmiritanica, (Tenchrio mauritani- cus, Linn.) because it is often found in great numbers in worm-infested granaries. But observations recently made up- on the carnivorous habits of other species of the genus, ren- der it probable that the larva? of the T. mmiritanica live upon the larv;e of the Calandra* and Trogosita COUTICAUS, Melsh.i—re, larva: c, its mandi-Tini;X?, which are the real aU- l)le: ri, antenna ; e, nuder side of head ; /, the t\vo-h<iriied anal plate ; h, the beetle ; h, its antenna": i, mandible ; g, thorS Of the damage. ThiS vieW labium and its palpi; ;, one of the maxilla- and its palpus —after Kiiey. " is confirmed by our own obser- tions upon the larva of a common American species, the Trogosita corticalis, of Melsheimer, which we have seen preying ui^ou the larva of the Codling-moth fCarpocapsa pomonella). The Trogositidai are oblong, somewhat depressed or flattened beetles, of a black or reddish black
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