88 BULLETIN 168, UNITED STATES NATIONAL MUSEUM 



13. Postantennal organ subequal in length to the diameter of an eye 



(in var. caeruleatra one and one-half to three times as long). 

 Unguis typically with a strong inner tooth. Unguiculus 

 typically with a strong tooth. Crenulations of dens ending 

 at a distance from the mucro equal to three times the length 

 of the latter. Mucro a little shorter than hind unguiculus. 

 Body setae moderately to very long. Sensory setae long. 



violacea (p. 101) 

 Postantennal organ in length one and one-fourth to two times 

 the diameter of an adjacent eye. Body setae short to mod- 

 erately long ' 14 



14. Inner tooth of unguis strong. Tooth of unguiculus strong. 



Crenulations of dens ending at a distance from the mucro 

 equal to three to four and two-thirds times the length of the 

 mucro. Apical tooth of mucro not long and slender. Eyes 



unequal. Abdominal sensory setae long 15 



Inner tooth of unguis small or absent. Tooth of unguiculus 

 minute or absent. Crenulations of dens ending at a distance 

 from the mucro equal to one and one-half times the length 

 of the mucro. Mucro one and two-thirds times as long as 

 hind unguiculus. Apical tooth of mucro relatively long and 

 slender. Eyes subequal. Abdominal sensory setae short. 



olivacea neglecta (p. 101) 



15. Body uniformly blackish purple. Legs and furcula whitish, 



yellowish, or brownish. Crenulations of dens ending at a 

 distance from the mucro equal to four and two-thirds times 

 the length of the mucro. Mucro three-fourths as long as hind 



unguiculus arborea nigra (p. 86) 



First four body segments usually purple throughout; second, 

 third, and fourth abdominal segments each with a broad 

 white posterior band. Crenulations of dens ending at a dis- 

 tance from the mucro equal to three times the length of the 

 mucro. Mucro one and one-half times as long as hind un- 

 guiculus nigrifrons (p. 105) 



16. Head conspicuously large in proportion to the body, almost 



one-third as long as the latter. Olive-green grandiceps (p. 108) 



Head not noticeably large 17 



17. Eye spots not greatly elongate (length: width as 5:3). Post- 



antennal organ variable in length. Inner tooth of unguis 

 (occasionally absent) near the middle. Unguiculus extend- 

 ing one-half as far as the unguis. Furcula attaining the ven- 

 tral tube. Apical tooth of mucro not very long and slender. 



Coloration various olivacea (p. 98) 



Eye spots elongate {2% to 3 times as long as wide). Postanten- 

 nal organ two to three times as long as the diameter of aa eye. 

 Inner tooth of unguis weak or absent; when present, one-third 

 from the apex. Unguiculus extending two-thirds as far as 

 the unguis. Furcula extending only to the middle of the 

 second abdominal segment. Apical tooth of mucro very 

 long and slender. White or snuff j^ellow albella (p. 95) 



