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Two European Arachnids New to the United States
By William B. Muchmore
Entomological News 74: 208-210, 1963
Cite: 898389
Full Text

First record of the European opilionid, Trogulus tricarinatus, in the USA. Also, a record of the European pseudoscorpion, Roncus lubricus, having been introduced to a greenhouse, but the population disappeared (apparently eradicated by the continued application of pesticides).