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By J. E. H Martin

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Extra resources for Collecting, preparing, and preserving insects, mites, and spiders (The Insects and arachnids of Canada)

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Be careful to avoid contacting parasitic arthropods or other arthropod-borne pathogens when you are operating the aspirator by mouth. Aspirator filters do not entirely prevent this danger, so it is best to replace oral suction with bulb suction when you are collecting ectoparasites and soil arthropods. 43 Fig. 31. Fig. 32. An aspirator. Fig. 33. J) 44 \ An aspirator. An aspirator. The use of a bulb or Singer aspirator is highly recommended for collecting mites, small insects, and spiders, particularly from plants, because it collects directly from the habitat into the preservative and avoids the problem of handling delicate specimens.

Sifter and photoeclector A sifter (Fig. 41) is one of the most efficient methods of systematically collecting many groups of small, obscure arthropods, particularly Coleoptera, from litter and debris. It is especially useful for separating much of the coarse debris from a sample and concentrating the catch" with the finer sifted material for extracting. The sifter is made from two hoops of heavy metal about 30 cm Cl ft) in diam, each provided with a handle. ) mesh wire screen of about the same diam.

The top may be a tight-fitting lid or the cloth may extend over the metal frame so it can be tightly tied closed. The lower part of the covering tapers to a ring, which is sewn in to hold a wide-mouth jar. ) baskets for holding the sample are suspended by hooks from the top of the frame. The sifted material placed in the wire baskets slowly dries out on the darkened upper part of the apparatus. The insects are attracted to the light and to the higher humidity in the bottom of the apparatus, which is a wide-mouth jar with a moist cloth in it.

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