INVESTIGATIONS ON THE MUTILLID WASPS 49 



61. Pubescence of abdominal tergites 3-5 entirely black, except narrow lateral 



marglBs silvery creusa var. taellona (p. 142). 



Pubescence of abdominal tergites 3-5 not entirely black; either broad 

 lateral margins of tergites 3-5, tergites 3-5 entirely, or tergites 4-5 en- 



GO 



tirely pale "''• 



62. Pubescence of dorsal areas of head, thorax, and abdomen, sparse and ap- 



pressed; pubescence of apical margin of second abdominal tergite 

 black ^^• 



Pubescence of dorsal areas of head, thorax, and abdomen long, dense, and 

 erect; pubescence of apical margin of second tergite ferruginous, the 

 apical fringe whitish, interrupted medially with black 



Ursula (p. 143). 



63. Dorsum of thorax with a transverse, sinuate carina immediately anterior to 



the scutellar scale ; carina of first abdominal sternite produced anteriorly 



into a prominent tooth "4- 



Dorsum of thorax without a transverse, sinuate carina ; only scutellar scale 

 present ; carina of first sternite usually bidentate 65. 



64. Pubescence of abdominal tergites 3-5 silvery ; apical margin of second ter- 



gite black, sometimes interrupted medially by a spot of silvery pubescence. 



lepeletierii (p. 132). 

 Pubescence of abdominal tergites 4-5 silvery, apical margin of second ter- 

 gite, and third tergite entirely black bioculata (p. 126). 



65. Apical fringe of first abdominal tergite silvery; that of the second tergite 



silvery, narrowly interrupted medially with black 66. 



Apical fringes of first and second abdominal tergites largely black; broad 

 apical margin of second tergite black vesta (p. 105). 



66. Front deeply, confluently punctate ; body moderately pubescent. 



vesta var. errans (p. 118). 

 Front with shallow, separated punctures ; body very sparsely pubescent. 



vesta var. sappho (p. 117). 



67. First segment of flagellum about twice as long as it is wide at the apex, 



almost as long as segments 3 and 4 united; second abdominal tergite 



coarsely, foveately punctate 68. 



First segment of fiagellum distinctly shorter than twice its width at the 

 apex, much shorter than segments 3 and 4 united; second abdominal 

 tergite moderately punctate '<'0- 



68. Head and thorax silvery pubescent and with scattered, erect, black hairs; 



no definite areas of black pubescence on vertex, or dorsum of thorax. 



eurynome (p. 209). 



Head and thorax more or less silvery pubescent, but vertex, or dorsum 



of thorax with definite areas of black pubescence 69. 



69. Vertex and mesonotal area with the pubescence predominantly black ; second 



abdominal tergite with a small, basal, median spot of black pubescence. 



saetigera (p. 211). 

 Only the pronotal area with the pubescence predominantly black; second 

 abdominal tergite with a submedian spot of black pubescence. 



bonita (p. 208). 



70. Head and thorax with pale pubescence throughout 71. 



Pronotal and mesonotal areas clothed with black recumbent pubescence and 



scattered, erect, dark hairs birkmani (p. 205). 



