Dieser einleitende zoologische Text behandelt das Verhalten und die physischen Eigenschaften von Heuschrecken und Grillen, einschließlich ihrer Stridulationsmethode, bei der männliche Grillen Geräusche erzeugen, indem sie ihre Flügel aneinander reiben, um Paare anzulocken.
1577 x 1584 px | 26,7 x 26,8 cm | 10,5 x 10,6 inches | 150dpi
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. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. GRASSHOPPERS AND CRICKETS. 41. Fig. 43 Portion of the Cornea of a Fly's Compound Eye (magnified). like ours, but are more like the sounds we produce when playing on a violin. Careful observation of a male cricket will best show us a method of stridulating, as this process of insect-talk- ing is called. Watching a cricket as he stridulates, one can see that the outer wings are raised and rapid- ly moved from side to side. If, now, the wing be ex- amined with a microscope, a clear membrane remind- ing us of a drum-head will be seen on each wing, and on the under side of each outer wing will be found an enlarged roughened cross- vein which is used like the bow of a violin, being drawn across the edge of the opposite wing- cover to set in motion the membranous drum-heads. The cricket's organ of hearing is situ- ated on the tibia of the front leg. Some insects hear by means of hairs on the antennae or elsewhere which move in unison with vibrations about them. In some cases insects may be able to hear sounds entirely inaudible to human ears. Taste and Smell. The sense of taste probably resides in the palpi. That the grasshopper can smell is evident from the way in which he chooses his food, and also from the fact that certain odors seem disagreeable to him. Touch. That the grasshopper pos- sesses the sense of touch is easy to prove, and that the antennae are especially sensitive as tactile organs is equally evident. The antenna are provided with Fig. 44..—The Hearing Organ of a Cricket {magnified).. 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 work.. French, Nathaniel Stowers, 1854-. New York [etc. etc. ] Longmans, Green and Co
