The following paper is a list, with biological notes, of 14 species of the peculiar and little known genus, Strumigenys, six of which are new and are here described. All the material was collected within 45 miles of Jackson, which is located centrally in southern Ohio. Strumigenys (Cephaloxys) pergandei Emery In a previous p.aper e it was shown that S. pergandei lives, in southern Ohio at least, near the colonies of various other species of ants, hunting the Collembola which often abound in the nests of these other species. Since the publication of that paper, we have found S. pergandei on more than 30 occasions in this region, and only once was it not obviously associated with another ant. Stray workers have been found in nest galleries of Camponotus herculeanus subsp. pennsyl.vanicus (Degeer), Formica fusca (L.), and F. truncicola subsp, integr'a Nyl. Three workers were found in an outlying gallery of a F. fusca mound. The gallery led from the mound to a small kitchen midden to which the pergandei seemed to be going, not, as experiments, have 1We wish to express our deep appreciation to Dr. M. R. Smith, U. S. National Museum, for his suggestions as to the relationship of several of the new forms, as well as for his loan of much cotype material for comparison. The types of the new species are to be deposited in the collection of the Museum of Comparative Zoology, Cambridge, Mass. Paratypes, when present, will be deposited in the collections of Dr.
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