Dry-Ice (Co2) Trap for Efficient Field Collection of Ornithodoros Coriaceus (Acarina: Argasidae)

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Abstract
Ornithodoros coriaceus Koch is widely distributed in coastal and mountainous regions of California and Mexico. This tick lives in the substrate under tree and chaparral species that serve as cover for deer and range cattle, its principal hosts. Data on the distribution and density of this tick are difficult to obtain because nymphs and adults feed rapidly, within 15 to 25 min., and drop off unnoticed; larvae, which remain on their hosts for 7 to 10 days, do not normally feed on man (Loomis, 1959, J. Parasitol. 47: 91–99). Therefore, surveys must be confined largely to methods for collecting the tick from the soil and vegetative habitat it occupies between host feedings.

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