INVESTIGATIONS ON THE MUTILLID WASPS 55 



53. Pit on second stemite distinctly basal in position liora (p. 196). 



Pit on second stemite approximately median in position 54. 



54. Antennal scrobes not, or very obscurely carinate above; lateral lobes of 



anterior division of scutellum coarsely punctate throughout 55. 



Antennal scrobes distinctly carinate above ; basal fourth or third of lateral 

 lobes of anterior division of scutellum glabrous, impunctate 56. 



55. Vertex and dorsum of thorax clothed with black pubescence. 



lepeletierii (p. 132). 

 Vertex and dorsum of thorax clothed with fulvous pubescence. 



pyrrhus (p. 139). 



56. Dorsum of thorax clothed with black pubescence praegrandis (p. 148). 



Dorsum of thorax clothed with fulvous pubescence. 



praegrandis var. russata (p. 152). 



57. Pubescence of head, thorax, and legs entirely black 58. 



Pubescence of head and thorax, at least above, not black, colored other- 

 wise -^^• 



58. Apical margin of second tergite, and tergites 3-5 entirely, with yellowish, 



reddish, or orange pubescence 59. 



Apical margin of second tergite, and tergites 3-5 entirely, with black 

 pubescence "■'■• 



59. Integument of apical half of second abdominal tergite yellowish. 



serenitas (p. 289). 

 Integument of apical half of second abdominal tergite black 60. 



60. Pronotum emarginate medially on the cephalic margin ; fulvous pubescence 



covering only the apical margin of second tergite chisos (p. 284). 



Pronotum not emarginate medially on the cephalic margin; fulvous pubes- 

 cence covering apical half of second tergite mimula (p. 255). 



61. Posterior declivity of tegulae setigerously punctate gentilis (p. 199). 



Posterior declivity of tegulae glabrous, impunctate 62. 



62. Pit on second abdominal sternite distinctly basal in position_castor (p. 198). 

 Pit on second abdominal sternite distinctly median in position 63. 



63. Narrow lateral rim of second abdominal tergite microscopically punctate, 



clothed with very fine, short pubescence; first abdominal segment and 



second abdominal sternite usually black or blackish 64. 



Narrow lateral rim of second abdominal tergite impunctate, glabrous, bare ; 

 first and second abdominal segments, and sometimes propodeum fer- 

 ruginous rubricosa (p. 192). 



64. Occiput with distinct lateral depressions, leaving a median area distinctly 



elevated; anterior margin of pronotum distinctly emarginate medially, 

 the dorsum not broadly rounding medially into the cephalic surface. 



meracula (p. 201). 



Occiput without or with only very faint lateral depressions ; anterior margin 



of pronotum not emarginate medially; the dorsum broadly rounding 



medially into the cephalic surface permista (p. ISO). 



65. Head fully as wide as the thorax 66. 



Head distinctly narrower than the thorax 67. 



66. Head, thorax, and abdomen, above clothed with golden yellow pubescence. 



aureola (p. 251). 

 Head, thorax, and abdomen, above clothed with scarlet pubescence. 



aureola var. paciiica (p. 253). 



67. Pubescence of legs white or pale, abdominal integument for the most part 



ferruginous ^^^ 



Pubescence of legs entirely black ; abdominal integument entirely black_-69. 



55287—28 5 



