66 



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(Proceed. Entom. Soc. Philadelphia. 4 parts, 1861 — 65.) 

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Packard, A. S., *Bevision of the fossorial Hymenoptera of North- America. 

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Pagenstecher, H.A., *t7eôer Myrniecocystus Mexicanus(Verha,uál. naturhist.- 

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Pallas, P. S., ^Reisen durch verschiedene Provinzen des Bussischen Reiches, 

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