New York Agricultural Experiment Station. 485 



song and mating habits. 



The song is intermittent but readily distinguished from niveus 

 by its longer notes and rests and by its non-rhythmical character. 

 The pitch is from C # to D #, two octaves above middle C, depend- 

 ing on temperature and somewhat on individual variation. The 

 sound is not so loud as that made by niveus and is of a more mourn- 

 ful quality. Each trill continues from one to five seconds, but it 

 lasts most commonly for about two seconds. The periods of rest 

 vary more and may be from one to eight seconds or longer. On one 

 occasion a specimen alone in a cage was observed to trill continuously 

 for a minute or more. Out of doors the song would be unnoticed by 

 anyone not endeavoring to detect it. On trees where angustipennis 

 occurs in equal abundance with niveus the song is nearly drowned 

 out by the synchronous beat of the latter species and only by listen- 

 ing intently can it be detected. So far as we have observed it 

 sings only at night. The method of producing the sound and the 

 structures that make it possible are essentially the same as described 

 under niveus. On account of the narrow forewings, however, the 

 rasp is not so long and the resonating surface is not so great, which 

 may, at least in part, account for the feeble production of sound by 

 this species. 



The mating habits are essentially the same as those of the preceding 

 species. 



LOCAL DISTRIBUTION. 



This cricket occurs quite often on the same trees with niveus, 

 but while individuals of this species are very abundant in apple 

 orchards they are, however, not so much confined to these trees as 

 are those of the latter. On Long Island we found this insect quite 

 common on oak trees, especially the scrub and burr oaks, and in 

 a swamp near Geneva there were considerable numbers on alder 

 bushes. We have never taken angustipennis on raspberries, grape, 

 or weeds of any kind. 



FEEDING HABITS. 



An examination of the crop contents of a number of specimens 

 collected on apple trees shows that this species has food habits very 

 similar to niveus. Leaf tissue, fungus mycelia and spores, aphids, 

 San Jose scales and moulted skins comprise the bulk of its food. 

 In two individuals we found a number of lepidopterous wing scales 

 while in another specimen a leg and the wings of some small hymenop- 



