. Coleoptera : general introduction and Cicindelidae and Paussidae. tileorgans. Before leaving the subject of the organs of sense in the Coleo-ptera it is perhaps necessary to say that the terms adopted aremerely provisional, and that although insects appear plainly to havethe organs of sight and touch well developed in a manner analogous ORGANS OF SENSE. 27 to, yet in many points differing from, what we find in the Verte-brates, yet we know nothing, as a matter of fact, about their othersenses, which may be entirely different from anything of which wehave any conception. We can only pick out
. Coleoptera : general introduction and Cicindelidae and Paussidae. tileorgans. Before leaving the subject of the organs of sense in the Coleo-ptera it is perhaps necessary to say that the terms adopted aremerely provisional, and that although insects appear plainly to havethe organs of sight and touch well developed in a manner analogous ORGANS OF SENSE. 27 to, yet in many points differing from, what we find in the Verte-brates, yet we know nothing, as a matter of fact, about their othersenses, which may be entirely different from anything of which wehave any conception. We can only pick out certain structuresand say that they have apparently to do with smell, taste, orhearing, but we may be quite mistaken. In fig. 17, some of theseorgans are represented. We have first (A) the apex of the antennseof a larva of Pentodon punctatus (Dynastim), with a sensoryplate (a) and sensory hairs (str), and also the apex of the palpusof an adult Melolontha (B), with sensory hairs or setae ; we cannot,however, say with certainty whether these have to do with smell,,. Fig. 17.—Organs of sense in Coleoptera :—A. Pentodon punctatus, apex ofantenna of larva ; a, sensory plate ; str, sensory hairs. B. Melolontha,apex of palpus. C. Autennal pit of Melolontha vulgaris. D. Antennalteeth of Anophthalmias tellkampfii. (After Berlese and Hauser.) taste, or hearing. One of the antennal pits of Melolontha vulgaris,seen in a vertical section, is represented at C. These pits, whichoccur commonly in the Lamellicorkea, have been referred to above;they are very remarkable both for their structure and their says of them (Text-Book of Entomology, p. 275):— Onthe outer surface of the first and seventh (in the female the sixth)antennal leaf, as also on the edges of the other leaves, only arisescattered bristles ; on the inner surface of the first and seventhleaves, as also on both surfaces of the second to the sixth leaves,are close rows of rather shallow depressions of irregular f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1912
