. Bulletin. Science. 38 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 5. Two males in close proximity without apparent aggression (photo D. A. Gray). Dark arrows indicate the positions of the two males, one of which is calling. timeters of each other. A similar pattern of peak abundance in mid-fall was ob- served in 2002. Although not conclusive, these observations suggest a single generation per year. If the H. boreale life cycle is generally similar to that of other crickets, this would suggest the likelihood of an egg diapause during the winter months (Masaki & Walker 1987; Alexander 19
. Bulletin. Science. 38 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 5. Two males in close proximity without apparent aggression (photo D. A. Gray). Dark arrows indicate the positions of the two males, one of which is calling. timeters of each other. A similar pattern of peak abundance in mid-fall was ob- served in 2002. Although not conclusive, these observations suggest a single generation per year. If the H. boreale life cycle is generally similar to that of other crickets, this would suggest the likelihood of an egg diapause during the winter months (Masaki & Walker 1987; Alexander 1968; Mclntyre 1978; Tanaka et al. 1999). Consistent with this idea, we have had success at rearing H. boreale in the laboratory by imposing a 4 °C diapause for 60 days (Rakshpal 1962); direct hatching of eggs at room temperatures has been unsuccessful (D. A. Gray & J. Saidy, unpublished observations). Field Mating Behavior. Males were observed to call from cracks in the soil, while walking over rela- tively bare surfaces, frequently from under dried leaves, and infrequently while perched on vegetation. Males thus appear to adopt an active search strategy of mate finding in addition to site-tenacious calling. On numerous occasions males were observed to encounter other males while walking on the surface (Fig. 5). Obvious overt male-male aggression typical of held crickets (Alexander 1961; Hack 1997; Tachon et al. 1999) was never observed in the field however. Males. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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