Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory (continued from page 313). Author Cresson, E. T. text Proceedings of the Entomological Society of Philadelphia 1865 4 426 488 journal article 617B1A90701C4E9492FCA4480EB311D6 617B1A90701C4E9492FCA4480EB311D6 Myrmica occidentalis , new species This treatment is a stub. You can help Plazi making the full treatment available.