68 



five individuals close beside me immediately change their note from the day call to^the 

 night call. 



This species is exceedingly shy, and the observer must be patient who would hold 

 converse with it. One insect which I had disturbed and beside which I was standing 

 could not at first decide to resume his song ; he was afraid of the intruder, but, enticed 

 by a neighboring songster, gave utterance several times to a barely discernible short 



tcbw tchw tchvv tclnv tchw tcliw tcliw tchw 



Fig. 43. — Note of Scudderia angustifolia by night. 



click or ii ; after five or six of these efforts his desires overcame his fears. "^The note by 

 day is tzip or bzrwi, and lasts for a third of a second. The night song consists of a 

 repetition, ordinarily eight times, of a note which sounds like tchw. It is repeated at 

 the rate of five times in three-quarters of a second, making each note half the length 

 of the day note. 



In 1867 this species and Orchelimum vulgare were the first Locustarians to sing at 

 Jefierson, N.H., where I first heard them on July 28. 



This species is the Phaneroptera curvicauda of my previous notes on stridulation. 



Scudderia curvicauda (DeGeer) — Of this species Riley writes : " The shrill of the 

 male is by no means so loud as of the oblong-winged species \_A7nblijcoryplia oblongi/olia], 

 in which its sound is always drowned in the woods. It consists of a softer zeep, zeep, 

 sometimes uttered singly, but generally thrice in succession. THie call is occasionally 

 responded to by a faint chirp from the females, produced by stretching out their wings as 

 if for flight, and is as often heard in the day as at night." 



McNeill says : " Its note is not generally heard until the middle of the afternoon. 

 The note cannot be supposed to represent more than the first two syllables of the ' Katy- 

 did ' or ' Katy-didn't ' of its congeners. It is made but once and the rasping, jerky 

 sound has been very well represented by Mr. Scudder as bzrwl," (but this refers properly 

 to S. angustifolia, as noted above). 



Scudderia /areata Brunn. McNeill says that the note of this species is indistin- 

 guishable from that of the preceding species, but is much less frequently heard. 



Amblyco7'ypha oblongifolia (DeGeer) Stal. Harris says of this insect that " when 

 it flies it makes a whizzing noise somewhat like that of a weaver's shuttle," but the noise 

 is very feeble and subdued. He adds : " The notes of the male, though grating, are 

 comparatively feeble." I have not studied its note attentively, and only recorded that 

 according to my then recollection it gave three rapid notes in succession like the true 

 katydid, but feeble. One observed subsequently, confined in the house, emitted two 



notes close together every few seconds, resembling tch-tch. McNeill also says that " its 

 note is a quick shuffling sound which resembles ' Katy ' or ' Katy-did ' very slightly." 



Amblycorypha Scudderae Brun. — Bruner says : " Like oblongifolia, this katydid 

 produces the peculiar cliick chick noise which is so characteristic a sound^] in our groves 

 during the months of August and September." 



Fig. 44. — Nobe of Amblycorypha rotundifolia. 



Amblycorypha rotundifolia Scudd. — This insect stridulates both by day and by 

 night and without variation. The song consists of from two to four .notes — almost 



