3/O PHYSICAL GEOGRAPHY. 



there is a crescendo movement, which reaches its volume in half a second ; 

 the trill is then sustained for a period varying from one to twenty seconds 

 (generally from six to eight seconds), and closes abruptly with p. This 

 strain is followed by a series of very short staccato notes sounding like 

 jip! repeated at half-second intervals; the staccato notes and the trill 

 alternate ad libitum^ The staccato notes may be continued almost indefi- 

 nitely, but are very rarely heard more than ten times in succession ; it 

 ordinarily occurs three or four times before the repetition of the phrase, 

 but not more than two or three times when the phrase is not repeated. 

 I have known it to be entirely omitted, even before the repetition of a 

 phrase. The interval between the last jip! and the recommencement of 

 the phrase never exceeds one quarter of a second. The night-song differs 

 from that of the day in the rarer occurrence of the immediate notes and 

 the less rapid trill of the phrase ; the pitch of both is at B flat. 



13. Thyreonotus dorsalis Scudd. I have taken a single specimen of 

 this insect as far north as Sudbury, Vt; and since it also occurs in 

 eastern Massachusetts, it will no doubt be found within the limits of New 

 Hampshire in the Connecticut valley. 



ACRYDII. 



14. Chloealtis conspersa Harr. This is a northern insect, extending from 

 Maine to Lake Winnipeg, and is found all over New Hampshire, even in 

 the valleys of the White Mountains. South of the state it occurs on 



Fig. 55- 



Note of Chloealtis conspersa in the sun. 



high lands. The male differs so much in appearance from the female 

 that I formerly described it under a distinct generic name. Its song is 



_ Fig. 56. 



trtrtrft tfrfrtn rtnr- 



Note of Chloealtis conspersa in the shade. 



of varied rapidity, according to the amount of sunshine ; in the sun it 

 makes from nine to twelve notes, at the rate of fifty-three in fifteen 

 seconds ; the usual number of notes is ten. 



