. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. Ml FAIIILT II. XIX. Tachts Sehaum. lS6n. fGr., ";') Very small black or brownish species having the characters of the tribe Btnibidiini. Front tibise obliquely truncate at apex; elytra glabrous, either striate or whoUy without stria, except that at suture, which is recurved at apex. They occur for the most part in damp places, beneath the bark of partly decayed lo^s and stumps; als
. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. Ml FAIIILT II. XIX. Tachts Sehaum. lS6n. fGr., ";') Very small black or brownish species having the characters of the tribe Btnibidiini. Front tibise obliquely truncate at apex; elytra glabrous, either striate or whoUy without stria, except that at suture, which is recurved at apex. They occur for the most part in damp places, beneath the bark of partly decayed lo^s and stumps; also in moss and ant hills and beneath chunks on mud flats. When uncovered they run very rapidly, whence the generic name. About 4-5 species are known from the United States: of these 15 have been taken in Indiana. The only paper treating of the genus is by: Hayivard.—"A Study of the Spe-ies of Taehys of Boreal Amer- ica" in Trans, .^jner. Ent. XXYI. 1S99. 191-23S. For convenience Hayward divided the genus into nine groups, his primary division being based upon the presence or absence of punctures on the mentum. C'f this character he says: "'The mentum varies in the different species being more or less emargi- nate in front, with a tooth of varying prominence at the bottom of the emargination. In rather more than half of the United States species there may he observed, behind the t'joth, two large fora- meniform punctures which are entirely absent in the other group. These are not difficult tc> detect, even with a hand lens, and as soon as recognized, their presence or absence can be readily determined. even in the smallest ; Since- only one-third of the specie^; treated by Hayward occur in Indiana, they will be separated into but two groups, and this is done only to lessen the length of the keys to Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1910
