582 ANNUAL EEPOET SMITHSONIAN INSTITUTION, 19 2 8 



manner, as does the narrow-winged tree cricket, O. angustipennis^ but 

 with stronger, deeper-pitched intonations. This cricket may often be 

 heard in the region about Washington, but it is a rare and unusual 

 cricket to meet. Its lingering chirps often may not exceed a rate 

 of 2 to 10 per minute. 



STRIDULATIONS OF THE BUSH CRICKETS, SUBFAMILY TRIG- 



ONIDIINAE 



It would appear that one species of Anaxlpha^ A. imitator^ among 

 the tiniest of our crickets, has, so far as observations have revealed, 

 the habit of intermittent stridulation. The common little Anaxipha 

 exlgua, the only species in the region about Washington that has a 

 northward distribution to New England, may be said to trill so 

 slowly as to allow the separate wing strokes for each tinkling ti, in 

 its leisurely succession ti-ti-ti-ti-ti-ti, to be readily counted. If we 

 can still consider this the method of continuous trilling, the speed of 

 the forward stroke of the scraper has been reduced to only 200 to 

 300 per minute. 



Two species of Cyrtoxipha, C. gundlachi and its variety, C. colmn- 

 hiana, appear to possess the habit of intermittent stridulation. In 

 the latter species, which occurs in the region of Washington, the 

 shrill, high-pitched chirp is decidedly measured and rhythmic, and 

 I have noted a marked synchronous chirping in some colonies. 



The beautiful, distinctively colored tiny red-headed cricket, Phyl- 

 loscyrtus pulchellus, trills in a faint, unbroken, long-continued, 

 quavering monotone. 



STRIDULATIONS OF THE LARGER BUSH CRICKETS, SUBFAMILY 



ENEOPTERINAE 



The bush cricket, Hapithus agitator, is one of the most sedentary of 

 all our crickets. It always appears lazy and little inclined to sing, 

 and when it does it utters a very weak, wavering, uncertain, con- 

 tinuous stridulation, which can be heard only a few feet away. 



In the genus Orocharis we have the jumping bush cricket, 0. salta- 

 tor, an exceedingly fine and musical species of the shrub-and-tree 

 zone. The note of this cricket is a clear, shrill, bell-like chirp, some- 

 what lingering or prolonged, and delivered at the leisurely rate of 

 35 to 40 times per minute, even on warm evenings. The notes of the 

 different singers have a widely varying pitch, so that when a group 

 is chirping on a calm autumn night a pleasing play of vibrant tones, 

 as clear as if struck from glass, appears to enliven all the trees 

 around. The notes are in a far higher pitch than the notes of the 

 snowy tree cricket, and are far more ringing, bell-like, and smooth. 

 They are never synchronal, however, each cricket chirping as he 

 pleases, in a joyful, leisurely way. 



