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mud crack field cricket

Gryllus integer Scudder 1901

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map composite map lectotype male lectotype male
52 s of calling, from Tulare County, Calif., 24.2°C. Dominant frequency 5.0 kHz. Recording by D.B. Weissman (S16-21, R16-60); used by permission. Click on sound bar to hear entire recording.
This sound spectrogram is a 4 s excerpt of the 52 s audio file accessible immediately above. The excerpt begins at 28 s. Click on sound bar to hear graphed song.
Song: Weissman and Gray (2019) described the song as a series of chirps produced in intermittent bursts, 2-4 (usually 3) pulses per chirp, 1000 chirps per minute. Pulse rate >70 at 25°C.
Identification: Medium cricket, black head, long and narrow tegmina, long wings, short hind femur. A key to the adult males of native US Gryllus is in Weissman and Gray (2019).
DNA: Sister species to G. armatus and that the two species may hybridize in the Four Corners area. For more information about DNA testing, see Weissman and Gray (2019).
Similar species: G. armatus has a similar song but usually has an introductory trill (G. integer rarely has an introductory trill); as well, their distributions are mostly seperate, except around the Four Corners area. These species can also be differentiated by DNA.
Range: California, across the southern parts of Oregon, Idaho, and Wyoming, circling south through Colorado then westward through Arizona, and occupying the Great Basin and the Mojave Desert.
Habitat: Watered lawns, dry grassy fields, cracks in concrete, dry ground, and dry lake beds, dumps, and gas stations.
Life cycle: Two generations per year in southern part of range, probably only one generation per year in northern part of range. No egg diapause.
Season: Spring into summer.
Remarks: As early as 1980 David B. Weissman began publishing the results of his field and laboratory studies of the Gryllus of the United States and Canada (Weissman et al. 1980). By 2003, David Gray had started his cooperation with Weissman by providing genetic analysis of the living Gryllus made available by Weissman's studies (e.g., Weissman, Walker, and Gray 2009). Weissman and Gray's manuscript regarding the Gryllus of US and Canada was published in Zootaxa on 5 December 2019. [The manuscript will soon be made available.]
Name derivation: Latin: whole, entire. It is unknown why this name was chosen by Scudder.
More information:
subfamily Gryllinae, genus Gryllus
References: Weissman and Gray 2019
Nomenclature: OSF (Orthoptera Species File Online)
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