Information regarding the eggs and egg sacs of spiders found in agricultural crops in the San Joaquin Valley of California's Central Valley is presented as a feasibility study to aid inspection of international commerce. Egg diameter showed little variation within a species and strong variation among species; hence, it is a valuable diagnostic feature. Egg quantity per sac and sac dimensions showed greater and overlapping variation, yet are still somewhat diagnostic depending on the species. Least diagnostic was the phenology of egg sac production, but this characteristic was still useful in determining that some species finish producing egg sacs prior to crop harvest, indicating that they would not be found in transported produce. A diagnostic key utilizing the most useful of these features is provided. Overall, it appears likely that if keys regarding spider eggs and egg sacs could be developed, they could provide useful information in a real world economic situation.
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Vol. 41 • No. 2