Excerpt from Nearctic Collembola or Springtails, of the Family Isotomidae
When living in Cambridge, Mass. I made descriptions and draw ings from the Packard collection Of Collembola in the Museum Of Comparative Zoology, through the courtesy Of Samuel Henshaw. This collection consisted mostly of the material described by Packard (1873) in his Essex County paper. This paper had no illustra tions, but in the course Of its preparation Dr. Packard made a great many pencil drawings, which he gave to me, and these have been a useful aid to the recognition of the species that Packard described.
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