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The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae).
By C. R. Vardy
Zoologische Verhandelingen / Zoologische Mededelingen, 2005
Cite: 1138775
This is currently the most up-to-date treatment of the genus Pepsis...published in three parts between 2000 and 2005 (by two different publishers).

Part 1. Introduction and the P. rubra species-group. Zool. Verhandel., vol. 332 (2000), pp. 1-86. (Full Text)
Part 2. The P. grossa- to P. deaurata-groups. Zool. Verhandel., vol. 338 (2002), pp. 1-134. (Full Text)
Part 3. The P. inclyta- to P. auriguttata-groups. Zool. Meded., vol. 79-5 (2005), pp. 1-305. (Full Text)

This work covers all the (many!) New World taxa in Pepsis...most of which occur south of the US, and thus outside our area. Below is a list of the 14 currently recognized species recorded from our area, indicating the Part and page number in Vardy where its description/discussion appears:

      P. aquila: Part 2, p. 63
      P. basifusca: Part 3, p.141
      P. cassiope: Part 2, p. 92
      P. chrysothemis: Part 1, p. 74
      P. grossa: Part 2, p. 58
      P. marginata: Part 2, p. 67
      P. menechma: Part 3, p. 131
      P. mexicana: Part 1, p. 65
      P. mildei: Part 3, p. 229
      P. pallidolimbata: Part 1, p. 77
      P. ruficornis: Part 3, p. 232
      P. sommeri: Part 3, p. 96
      P. terminata: Part 2, p. 68
      P. thisbe: Part 1, p. 60

A number of previous species names appearing in earlier treatments [e.g. Hurd(1)(1952), Townes(2)(1957), and Krombein(3)(1979)] have been changed by Vardy. Below is a list of old names for species in our area, followed by their new names under Vardy's synonymies:

      "P. angustimarginata" = P. basifusca
      "P. arizonica" = P. cassiope
      "P. azteca"= P. sommeri
      "P. cerberus" = P. menechma
      "P. elegans" = P. menechma
      "P. formosa" = P. grossa
      "P. saphirus" = P. ruficornis
      "P. venusta" = P. terminata