Key to puparia of Aleurocybotus species

1. Dorsal submarginal area with an evident glandular band (Figs. 4, 5, 7); dorsum with simple pores and devoid of large pores (Fig. 4); vasiform orifice cordate or subcordate with sides slightly (Figs. 6, 7) to markedly convex......................... 2

1’. Dorsal submarginal area with glandular area not evident; dorsum with simple pores associated with large pores arranged in a loose submarginal row and interspersed over dorsum; vasiform orifice subtriangular with sides approximately straight.... 3

2(1) Glandular band occupying entire width of dorsal submarginal area; submedian thoracic and abdominal depressions faintly marked; vasiform orifice cordate with sides rounded, inset from posterior margin by more than its own length; operculum trapezoidal and laterally rounded, its posterior margin slightly narrower than its anterior margin and distinctly wider than head of lingula................................................................................. cereus Martin

2’. Glandular band occupying external half of dorsal submarginal area (Figs. 4, 5, 7); submedian thoracic and abdominal depressions well marked (Fig. 4); vasiform orifice subcordate with sides slightly convex, inset from posterior margin by about its own length (Figs. 6, 7); operculum subcordate and laterally slightly convex, its posterior margin distinctly narrower than its anterior margin and slightly wider than head of lingula (Figs. 6, 7)...................................... mojavensis sp. nov.

3(1’) Submedian thoracic and abdominal depressions wider than long on abdominal segments III–VI; simple pores adjacent to large dorsal pores lacking dark rims; eighth abdominal setae anterior to widest section of operculum.. graminicolus (Quaintance)

3’. Submedian thoracic and abdominal depressions longer than wide on abdominal segments III–VI; simple pores adjacent to large dorsal pores with dark rims; eighth abdominal setae posterior to widest section of operculum............ occiduus Russell