Scudder.] 308 [October 23, 



middle of June until November; in the White Mountains their chirp- 

 ing did not commence this year until the 12th of August. The note 

 of the common species (G. iieglectus) is cr-rur-ri or crrrri; the rap- 

 idity with wliich it is uttered seems to vary very much, even in a 

 single strain by one insect. Sometimes the notes are produced as 

 slowly as two per second, but they may be twice as rapid; the mean 

 seems to be the usual rate. The note is sharp and slu-ill, and is ap- 

 parently pitched at E natural, two octaves above middle C. 



crrri crrri crrri 



'T^r^ 



Xote of Grylhis iieglectus. 



In listening one night in midsummer to the chirping of these in- 

 sects, I heard two choirs, one on either side of me, separated by a 

 garden fence. The individuals of each chirped together at the rate 

 of about two notes per second, but, whether owing to the influence of 

 a warmer situation, or a fuller exposure to the moonlight, one choir 

 invariably chirped a httle fester than the other, and fourteen seconds 

 elapsed between the perfect accord of the two choirs and their com- 

 plete discord; from this, fourteen seconds more to their former syn- 

 chronism. These cycles occurred twice per minute, and followed 

 each other with remarkable regularity for about an hour. 



Nemohius vittatus appears quite as early as Gij/llus, if not earlier. 

 Its chirp, although very similar to that of GrijUus, can be better ex- 

 pressed by 7-u or i-rru, pronounced as though it were a French word. 

 The note is trilled forcibly, and lasts a variable length of time; some- 

 times for several seconds; at others, it is reduced to a short, sharp 

 click. 



rii ru ru rii ru ru ru ru ru ru ru ru 



Kote of Kemobius vittatus. 



* It is necessary for me to describe the peculiar system of musical notation which 

 I have adopted. Each bar represents a second of time, and is ocoupied by the 

 equivalent of a seniibreve ; consequently a quarter note ( r ), or a quarter rest ( "^ ), 

 represents a quarter of a second; a sixteenth note (J), or a sixteenth rest (JJ), a 



sixteenth of a second, etc. For convenience' sake I have introduced a new form 

 of rest ( -^or ^), which indicates silence through the remainder of a measure. 



