72 SCOLIIDJE. 



h. Head, thorax, or abdomen, or all three, 

 black, variegated with yellow or ferru- 

 ginous red ; wings fuscous. 

 a'. Head, thorax, and abdomen all varie- 

 gated with orange-yellow (5 J ). 



Length 48-54 mm S. jyrocer, p. 75. 



v. Head only orange-red, rest of thorax 

 and abdomen black (5 J). Length 



18-21 mm (S". capitata, p. 76. 



c'. Head ( $ ) orange-red, ( J ) black ; 4th 

 and following segments of abdomen 

 more or less ferruginous red Avith ferru- 

 ginous pubescence ( § (5* ). Length 28- 



35 mm S. rtihiyinosa, p. 76. 



c. Head, thorax, and abdomen variegated 

 with black, yellow, and ferruginous red ; 

 wings deep fulvo-hyaliue S. hcemorrhoidalis, p. 77. 



B. Fore wing with 2 cubital cells. 

 a. Wings fuscous. 



a'. Antennae more or less yellow or orange- 

 yellow or red. 



a'-. Head — front and vertex orange-yellow. 

 a^. Antennge, scape, and flagellum en- 

 tirely orange-red S. erratica^ p. 77. 



b^. Antennae with scape black, fla- 

 gellum orange-red or yellow ; 3rd 

 abdominal segment at base above 



with a yellow fascia S. elizahethcc $ , p. 78. 



c^. Antennae with scape and one or 

 two basal joints of flagellum 

 orange-red or yellow, rest of fla- 

 gellum fuscous black ; abdomen 



without yellow markings S. molesta, p. 79, 



h'. Head black. 



a^. Antennae orange-red, scape and 

 basal j oint of flagellum black ; wings 

 with purple efl'ulgence. 

 a"*. 3rd segment of abdomen with a 



lateral yellow spot S. hibmnta, p. 79. 



6''. Abdomen wholly black *S'. aureipennis, p. 79. 



h^. Antennae with scape ferruginous 

 red, flagellum bright yellow ; wings 

 with a coppery golden effulgence. . *S'. obscunt, p. 80. 

 b'. Antennae wholly black. 



«^. Head with front and vertex more or 

 less marked with yellow. 

 a^. Comparatively large, over 20 mm. 

 long. 



o*. Wings fuscous with a violet and 

 golden effulgence; median seg- 

 ment closely and profoundly 



punctured, cribrate S. bhamoensis, p. 80. 



b^. Wings dark fuscous with a blue 

 and purple effulgence ; median 

 segment less closely punctured, 

 not cribrate S.fulvifrons $ , p, 81. 



