Allard — The Strididations of some " Katydids.'' ' 37 



Amhli/roi'ppha rotundifolia Scudder is a smaller katydid than 

 A. oblongifolin, and occ-urs around Washington, D. C. On the 

 night of August 25, 1909, I caught a male of A. rotundifolia 

 close to the ground on a dry, rocky, wooded hillside on 

 Plummer's Island. Its stridulations were continued for some 

 time while I closely observed it near by. Its song is brief, 

 faint, and of the same lisping character as that of Amhlycorypha 

 uhleri, but entirely unlike it in delivery. Each phrase is a soft, 

 shuffling noise repeated at intervals, — sh-sh-sh-sh — sh-sh-sh-sh 

 — sh-sh-sh-sh. Scudder likens the notes to " chic-a-chee," 

 several times repeated. In a study of the katydids occurring at 

 Thompson's Mills, I have not yet obtained this species. 



One of the commonest eastern katydids is the little Amhly- 

 corypha uhleri Brunner. This species is very common around 

 Washington, D. C, and exceedingly common at Thompson's 

 Mills, Georgia. Everywhere, it dwells not far from the ground 

 in the tall grass and weeds of old fields and roadsides. The 

 individuals of this species do not seem to congregate into well- 

 defined colonies at all, but remain more or less evenly dis- 

 tributed throughout the fields. This katydid stridulates occa- 

 sionally during the day, but usually at night. On warm, 

 moonlight evenings its soft lisping responses are almost the 

 dominant notes of the low^ weeds of the fields and roadsides. 

 I have studied the notes of A. uhleri very carefully and find 

 them quite variable. 



The complete song begins with a prolonged, soft, silken, 

 almost uniform noise produced by a rapid, shuffling wing 

 movement. This note soon passes into a succession of short, 

 vehement staccato lisps, — sip-itsip-itsip-itsip-itsip, and termi- 

 nates with a rapid, shuffling sound two or three times repeated, 

 sh-sh-sh-sh-sh-sh-sh — sh-sh-sh-sh-sh-sh. The complete song 

 may be expressed, thus: — s-s-s-s-s-s-s-s-s-sip-itsip-itsip-itsip- 

 itsip-sh-sh-sh-sh-sh — sh-sh-sh-sh-sh — sh-sh-sh-sh-sh-sh-sh. In 

 some instances a succession of staccato lisj^s, tip-tip-tip-tip, 

 very slowly repeated, follow the final phrases, sh-sh-sh-sh-sh-sh, 

 recalling the lispings notes — tsip-tsip-tsip-tsip, in the song of 

 an Orchelimum. Other individuals deliver only the lisping 

 phrases, sh-sh-sh-sh-sh-sh, which are always preceded by an 

 almost inaudible click of the wings. This song may be 

 expressed as follows: tip-sh-sh-sh-sh-sh. If two males are 



