304 
Psyche 
[September 
Fig. 4. Chirp — Sennheiser 804 microphone, 3-4 in., 0 db, 15 ips, 37° 
incandescent lighting, grasshopper age 4 weeks from Black Mesa, recorded 
at Gothic at 9500 feet; Missilyzer VU in —1/0, VU out —6.5/— .5, ML 7.5. 
Fig. 5. Alarm cry of a chipmunk ( Eutamias sp.) — AKG microphone 
with parabola, 20 feet, —20 db, 15 ips, about 25°C (6:00 MDT), recorded 
at Gothic, 9700 feet; Missilyzer VU in +2/3, VU out —10/— 7, ML 8.0. 
Fig. 6. Crepitation and squeal — AKG microphone without parabola, 
4-8 in, —10 db, 15 ips, 37° Sun, Gothic 9500 feet; Missilyser VU in 
+ 2/+3, VU out —10/7, ML 8.0, Spectrogram repeated at VU —10 five 
times to emphasize squeal over background (no decrease in resolution was 
observable). 
Fig. 8. Buzz — 'AKG microphone with parabola, 3 feet, —20 db, 15 ips, 
40°C, Gothic at 9600 feet; Missilyzer VU in +2/+3, VU out —.5/0, 
ML 7.5. 
Fig. 9. Flutter-rasp — Sennheiser 804 microphone, 4 in. 0 db, 15 ips, 
37 °C incandescent lighting, grasshopper age about 4 weeks from Black 
Mesa, recorded at Gothic at 9500 feet; Missilyzer VU in +1.5/ + 2.5, 
VU out —6.5/— 5.5, ML 7.5. 
Literature Cited 
Alexander, R. D. 
1960. Sound communication in Orthoptera and Cicadidae. In: Lanyon, 
W. E. and W. N. Tavolga (Editors), Animal Sounds and Com- 
munication. (Washington, D.C.: Amer. Inst. Biol. Sciences), 
pp. 38-92. 
1967. Acoustical communication in arthropods. Ann. Rev. Entomol., 
12: 495-526. 
Dethier, V. 
1963. The Physiology of Insect Senses (New York: Wiley), 266 pp. 
Dumortier, B. 
1963. Ethological and physiological study of sound emissions in Arthro- 
poda. In: Busnel, R.- G. (Editor), Acoustic Behaviour of Animals 
(New York: Elsevier), pp. 583-654. 
Faber, A. 
1936. Die Laut- und Bewegungsiiusserungen der Oedipodinen. Zeit- 
schr. wissensch. Zool., 149: 1-85. 
1953. Laut- und Gebardcnsprache bei Insekten. I, Orthoptera (Gerad- 
fliigler) (Stuttgart: Mitt. Staatl. Mus. Naturk.), 198 pp. 
Halliburton, W. and G. Alexander 
1964. Effect of photoperiod on molting of Chortophaga viridifasciata 
(De Geer) (Orthoptera: Acrididae). Entom. News, 75: 133-137. 
Haskell, P. 
1961. Insect Sounds (Chicago: Quadrangle), 189 pp. 
Highknam, K. and O. Lusis 
1962. The influence of mature males on the neurosecretory control of 
ovarian development in the desert locust. Quart. Jour. Microsc. 
Science, 103: 73-83. 
