...on the drums under the wings, shown in Figure 6, at^#,by alternately tightening and loosening them. The general noise, on approaching the infested woods,...They can also produce a chirp somewhat like that of a cricket's, and a very loud shrill screech, prolonged for fifteen or twenty seconds, and gradually increasing...

...described in detail; nor would I pretend to put them to musical scale. Writing seventeen yeaft ago I described the notes in a general way as follows:...young birds under similar circumstances — a sort ot scream. They can also produce a chiip somewhat like that of a cricket, and a very loud shrill screech,...

...described in detail, nor would I pretend to put them to musical scale. Writing seventeen years ago, I described the notes in a general way, as follows...that of a distant threshing machine and a distant frogpond. That which they make when disturbed mimics a nest of young snakes or young birds under similar...

...described in detail, nor would I pretend to put them to musical scale. Writing seventeen years ago, I described the notes in a general way, as follows...that of a distant threshing machine and a distant frogpond. That which they make when disturbed mimics a nest of young snakes or young birds under similar...

...described in 'letail, nor would I pretend to put them to musical scale. Writing seventeen years ago, I described the notes in a general way, as follows:...between that of a distant threshing machine and a distatlt frogpond. That which they make when disturbed mimics a nest of young snakes or young birds...

...described fh detail, nor would 1 pretend to put them to musical scale. Writing seventeen years ago, 1 described the notes in a general way? as follows:...that of a distant threshing machine and a distant frogpond. That which they make when disturbed mimics a nest of young snakes or young birds under similar...

...described in detail, nor would I pretend to put them to musical scale. Writing seventeen years ago, I described the notes in a general way, as follows...infested woods, is a compromise between that of a distant threshing-machine and a distant frogpond. That which the}1 make when disturbed mimics a nest of young...

...described in detail, nor would I pretend to put them to musical scale. Writing seventeen years ago, I described the notes in a general way, as follows...infested woods, is a compromise between that of a distant threshing-machine and a distant frogpond. That which they make when disturbed mimics a nest of young...

...described in detail ; nor would I pretend to put them to musical scale. Writing seventeen years ago I described the notes in a general way as follows...That which they make when disturbed mimics a nest of yonng snakes or young birds under similar circumstances — a sort of scream. They can also produce...

...the infested woods, is a combination of that of a distant threshingmachine and n distant frog-pond. That which they make when disturbed, mimics a nest...circumstances — a sort of scream. They can also produce 1 Some entomologists consider that this "railway-whistle" note is the result of the combined efforts...