. Coleoptera: Lamellicornia. Scarabaeidae. Fig. 8.—Diagrammatic representatiou of the terniinal segments of Bipelicuf: bidens (left) and I), cantator (right), showing the stridulatory ridges. of which is considerably produced at the expense of the last segment. In Hcteronychus and related genera a pair of stridula- tory files occurs in the same situation. Other situations in which the'vibratory ridges occur in diiferent Indian genera of Scaeab^ are—at the inner edge of the elytron in the two large genera and Copris, the vibrations being set up in both cases by the movement of the abd
. Coleoptera: Lamellicornia. Scarabaeidae. Fig. 8.—Diagrammatic representatiou of the terniinal segments of Bipelicuf: bidens (left) and I), cantator (right), showing the stridulatory ridges. of which is considerably produced at the expense of the last segment. In Hcteronychus and related genera a pair of stridula- tory files occurs in the same situation. Other situations in which the'vibratory ridges occur in diiferent Indian genera of Scaeab^ are—at the inner edge of the elytron in the two large genera and Copris, the vibrations being set up in both cases by the movement of the abdomen ; within the hind coxal cavity iu the great beetles forming the genus Heliocopris, the apparatus being scraped by sharp projections upon the coxa; and upon the inside of the prosternum in Serica, in which the edge of the mesoaternum forms the other part of the instrument. In the curious little beetles of the genus Ocliodceas mentioned above another quite diflferent apparatus is found. Beneath the elytra on each side of the antepenultimate segment of the abdomen is a minute process, assuming various peculiar shapes in diiferent species, but always studded with teeth or tubercles capable of playing upon a micro- scopically sculptured area upon the corresponding lower surface of the elytron. In some large groups of Lamellicoknia peculiar types of stridulating organs have been found in representatives inhabiting otlier parts of the world, but none as yet iu any Indian representatives. Thus in several South American genera of EuteltN/E a striated plate occurs at the end of the hind femur (and the middle femur also in a few species), the ridges being made to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Arrow, G. J. (Gilbert John), 1873-1948. London, Taylor and Francis
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1910
