INVESTIGATIOlSrS OIT THE MUTILLID WASPS 53 



23. Pubescence of head, thorax, and apical segments of abdomen concolor- 



ous ^'^• 



Pubescence of head and thorax black, that of the apical segments of the 

 abdomen fulvous zelaya (p. 120). 



24. Pubescence of vertex, dorsum of thorax, and apical abdominal tergites 



ochraceous myrice (p. 121). 



Pubescence of vertex, dorsum of thorax and apical abdominal tergitea 

 whitish Candida (p. 296) . 



25. Pygidium with a distinct apical fringe of short, erect hairs 30. 



Pygidium bare, without a distinct apical fringe of hairs 26. 



26. Second sternite with a median area of fine, close punctures, each of the 



latter bearing a fine hair 27. 



Second sternite with large punctures only, no such median area 28. 



27. Pubescence of head and thorax black; that of the abdomen varying from 



red to yellow atrifulva (p. 290). 



Pubescence of head and thorax varying from red to yellow, concolorous 

 with that of the abdomen ocydrome (p. 292). 



28. Ultimate abdominal sternite squarely truncate at the apex, with scattered 



punctures throughout testaceiventris (p. 302). 



Ultimate abdominal sternite not truncate at the apex, the latter produced 

 forming a blunt median tooth, which is sometimes slightly emarginate; 

 apical third of ultimate sternite glabrous, impunctate 29. 



29. Pronotum conspicuously emarginate medially; first segment of flagellum 



very distinctly shorter than the second abdita (p. 293). 



Pronotum very weakly emarginate medially ; first segment of flagellum sub- 

 equal to the second, especially when measured ventrally. 



coccineohirta (p. 124). 



30. Integument of second abdominal tergite with a pair of large yellow spots 



on the apical half (in some specimens the spots coalesce, the disk of the 



second tergite then being largely yellow) 31. 



Integument of second abdominal tergite entirely black 32. 



31. Pubescence of vertex, and dorsum of thorax yellowish ursula (p. 143). 



Pubescence of vertex, and dorsum of thorax black. 



Ursula var. chiron (p. 148). 



32. Antennal scrobes not at all carinate above 33. 



Antennal scrobes distinctly carinate above 35. 



33. Tegulae finely, setigerously punctate throughout medora (p. 101). 



Tegulae glabrous impunctate, at least on the posterior half 34. 



34. Pubescence of vertex and dorsum of thorax black perilla (p. 300). 



Pubescence of vertex and dorsum of thorax yellowish. 



perilla var. gentilicia (p. 301). 



35. Ocelli very large and conspicuous; apical fringes of abdominal sternites 



entirely black dorippa (p. 297). 



Ocelli of normal size; apical fringes of abdominal sternites laterally 

 reddish 36. 



36. First segment of flagellum subequal in length to the second ; anterior margin 



of pronotum not at all emarginate medially glycera (p. 299). 



First segment of flagellum distinctly shorter than the second; anterior 

 margin of pronotum weakly emarginate medially 37. 



37. Pubescence of mesonotum entirely black phaon (p. 301). 



Pubescence of mesonotum in part or entirely red. 



phaon var. fimbrialis (p. 302). 



