North American spring-tails of the subfamily Tomocerinae

Collectors who are not especially interested in Collembola often have their attention attracted by large and agile specimens of Tomocerus. The species of this genus are among the largest ''spring-tails"' that we have, attaining often a length of 5mm. They occur under loose bark, in damp, decaying logs, in moss, and generally on the ground, under dead leaves, logs, or other objects. Some species are