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musical bush cricket

Hapithus melodius Walker 1977

image image image image
map male male female
29 s of calling song; male from Dade Co., Fla.: EVNP; 24.4°C. (WTL672-4a)
19 s of courtship song; male from Martin Co., Fla.; 26.2°C. (WTL672-8c)
spectrogram
 Click on sound bar to hear graphed song.
Sound spectrogram of 12 s of calling at 24.4°C (from WTL672-4a). Dominant frequency increases from 4.4 to 4.9 kHz as pulse rate increases.
Click on spectrogram to expand last 12 s of the spectrographic image.
spectrogram
 Click on sound bar to hear graphed song.
Sound spectrogram of 12 s of courtship at 26.2°C (from WTL672-8c). Dominant frequency 5.3 kHz.

timing of pulses in Hapithus melodius calling song
Event recorder displays of the timing of pulses in the calling song at 24.4°C (from WTL672-4a). Each vertical mark or open rectangle represents one pulse.   A. 75 s of calling.   B. The 2nd sequence in A.   C. The terminal 40 pulses of the 2nd sequence.   D. The terminal 9 pulses of the 2nd sequence.   (Fig. 4, Walker 1977).
Song at 25°C: A musical, irregular tink, tink, tink that speeds up and becomes a trill of ca. 14 p/s. Each such sequence lasts 8-20 sec., with the carrier frequency gradually increasing by several hundred Hertz. Courtship singing resembles calling except that the tinks are more irregular and no trills are produced.
Identification: Length 15–19 mm. Forewings covering less than two-thirds of abdomen; length of forewings generally more than 2.3 (males) or 2.2 (females) times medial length of pronotum. Stridulatory file with more than 70 teeth, 1.5 to 1.8 mm long.
Similar species: Short-winged bush cricket—wings shorter; fewer than 70 teeth in stridulatory file; no calling song.
Habitat: On grass and shrubby undergrowth, especially in pinewoods and in sawgrass marshes.
Season: June–Oct.
Remarks: This and the preceding species are closely related. They have not been found together, but specimens of the two collected 50 miles apart maintain their distinctive features.
More information:
subfamily Hapithinae, genus Hapithus
References: Walker 1977.
Nomenclature: OSF (Orthoptera Species File Online)

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