1911] Allard — Stridulations of Locustidae 119 



leaves and vegetation. The tegniina are very short, giving the 

 insect an awkard, unfinished appearance. 



Pyrgocorypha uncinata Harris. In October, 1909, the writer 

 took a single female of this interesting locust at Thompson's Mills, 

 Northern Georgia. This individual had entered a dwelling and was 

 crawling on the wall, probably attracted by a lighted lamp. No 

 other individuals were taken until the writer captured a single 

 male in stridulation in the same locality one dark night in October, 

 1910. The insect was traced by its note to the low grass and weeds 

 on a bank almost in the midst of the settlement. By the strong 

 light of a bull's eye lantern the writer approached within a foot or 

 two of the insect which continued to stridulate vigorously for some 

 time, even though in the full glare of a strong light. After its 

 notes had ceased, the insect at intervals jerked its body and wings 

 spasmodically without producing any sound. This peculiar behav- 

 ior is characteristic of a number of species of Conocephalus when 

 disturbed during stridulation. 



As Mr. A. N. Caudell has pointed out, it is probable that the 

 male taken in Northern Georgia had not arrived at the adult 

 stage very long before its capture, since its tissues, which must 

 have been soft, had shrunken considerably after mounting and 

 drying. On the grass and weeds very near where this male was 

 taken, the writer a night or two before heard several locusts in 

 stridulation, presumably individuals of Pyrgocorypha uncinafa. 

 As these insects were heard in stridulation but one or two nights, 

 it is possible that the stridulation period of this Pyrgocrypha 

 is very brief. The stridulation of this locust is a loud, penetrating, 

 prolonged z-z-z-z-z-z-z-z-z-z-z-z-z-z quite like the notes of a Con- 

 ocephalus. Its habits in many ways are very similar to those of a 

 Conocephalus which it resembles in some respects. 



Previous to the writer's observations in Northern Georgia, the 

 stridulations of Pyrgocorypha uncinata appear to have been 

 unknown. 



December, 1910. 



