228 THYSANOPTERA AND ORTHOPTERA. 



second on the evenings when they were counted, but the rate probably 

 varied with temperature, etc. During the day the same song was 

 compressed into a single rasping syllable with a rising inflection. 

 Usually it could not be resolved into separate parts, but an occasional 

 note, produced more slowly than the rest, showed that this day- 

 time note is the same as that composed of disparate syllables which 

 is usual at night. 



Scudderia pistillata Brunner. 



August 21 . 



On grass and weeds in dry locations. 

 Scudderia furcata Brunner. 



August 18. 



On grass on a broad, flat, and wet beach. 

 Scudderia immature and indeterminate. 



June 29 to July 28. 



On grass and in open woods, on small bushes or herbs. 



Subfamily Conocephalinae. 



Conocephalus ensiger Harris. 



Immature July 18; adults July 23 to August 16. 



On tall grass in either wet or dry situations. 



The song of the male is a rapid succession of rasping notes with 

 a very strong accent on alternate syllables, continuing several minutes 

 without interruption. After a brief rest, sometimes for less than a 

 second, the song is again taken up and lasts for a similar period. The 

 rate varies with the temperature, an increase of 1° C. in the tempera- 

 ture being accompanied by an increase of about 11 in the number of 

 accented syllables per minute. 

 Orchelimum vulgare Harris. 



July 9 to August 18. 



Grassy places, usually rather wet, but sometimes on quite dry 

 sand dunes. 



This was probabl\^ the most abundant species of the entire 

 family. Certainly it was the most conspicuous because of its song. 

 This is a long zee-e-e-e, followed by a tsit-tsit-tsit, all repeated over 

 and over again. It may be heard by day or night throughout the 

 season. The rate of stridulation here also appears to be related to 

 temperatm-e, but not so clearly as in Conocephalus ensiger because 

 there is great individual variabihty. 



Orchelimum immature and indeterminate. 



June 25 to July 23. 



On grass, sedges, ferns, etc., sometimes in dry situations, but 

 usually at the edge of ponds and marshes. 



