2l6 
Psyche 
[March 
Summary 
Oscillographic traces of sounds recorded on videotapes can be 
superimposed easily and synchronously on a duplicate of those tapes. 
The audio recording remains intact in the duplicate and the oscillo- 
trace allows rather precise analysis of slower movements and the 
sounds they produce. This system was tested on pre-existing tapes 
of courtship in the grasshopper Chortophaga viridifasciata (De 
Geer). The method promises to be useful in analysis of tapes used 
for monitoring behavior and also as a teaching device. 
Acknowledgements 
We are grateful to Prof. Gershon Berkson for sponsoring our use 
of the television facilities of the Small Groups Laboratory of the 
Department of Psychology at the University of Illinois at Chicago 
Circle. David Mucha helped prepare the photographic figures. Dr. 
Ruth Willey gave helpful advice during preparation of the manu- 
script. Technique development and publication were aided by NSF 
Grant GB-35594 to RBW through the Rocky Mountain Biological 
Laboratory. 
Literature Cited 
Elsner, N. 
1970. Die Registrierung der Stridulationsbewegungen bei der Feld- 
heuschrecke Chorthippus mollis mit Hilfe von Hallgeneratoren. 
Zeitschr. vergl. Physiol., 68: 417-428 
Elsner, N. and F. Huber 
1973. Neurale Gundlagen artspezifischer Kommunication bei Orthop- 
teren. Fortschr. Zool., 22: 1-48. 
Hoegh-Guldberg, O. 
1972. Pupal sound production of some Lycaenidae. Jour. Res. Lepid., 
10: 127-147. 
Loher, W. and M. K. Chandrashekaran 
1970. Acoustical and sexual behaviour in the grasshopper Chimaro- 
cephala pacifica pacifica (Oedipodinae) . Entom. Exp. & Appl., 
13: 71-84. 
1972. Communicative behavior of the grasshopper Syrhula fuscovittata 
(Thomas) (Gomphocerinae) with particular consideration of 
the male courtship. Zeitschr. Tierpsychol., 31: 78-97. 
Morris, G. K. and R. E. Pipher 
1972. The relation of song structure to tegminal movement in Metriop- 
tera sphagnorum (Orth., Tettigoniidae) . Can. Entomol., 104: 
977-985. 
