SCOTJA. lO 



c*. Wings light fuscous with a rosy 

 ett'ulgpiice ; median segment very 



sparseh' pimctiired S. nobilis, p. 81. 



h^. Smaller, under 18 mm. long. 

 rt*. "\ ertex and front wholly orange- 

 red or yellow, sides of pronotum 



above yellow S. humeralis 5 , p. 81. 



b*. Front below vertex with a cowl- 

 shaped black mark, sides of pro- 

 notum above black S. cucullata, p. 82. 



b^. Head wholly black. 



a^. Head, thorax, and abdomen wholly 

 black. 

 «*. Front above base of antennae 

 and up to posterior oc-elli raised. 



«*. Vertex smooth, impunctate. . S. Iceviceps, p. 82. 

 b^. Vertex closely punctured .... S. cyanipennu, p. 82. 

 i*. Front between base of antennae 

 and ocelli with a subquadrate 



depression 5. carbonaria, p. 83. 



e*. Front between base of antennae 

 and ocelli normal, rounded, 

 neither raised nor depressed. 

 o\ Median segment posteriorly 



deeply emarginate S. redtenbacheri, p. 83. 



P. Median segment posteriorly 



truncate, not emarginate .... S. cccrulans, p. 83, 

 VK Head and thorax black ; abdomen 

 black variegated with yellow or 

 ferruginous red. 

 a*. 2nd to 5th abdominal segments 

 fringed thickly with ferruginous- 

 red hairs, apical segment ferru- 

 ginous with ferruginous pubes- 

 cence S. indica, p. 84. 



b*. 2nd to 5th abdominal segments, 

 or any of them, with lateral 

 maculae or transverse bauds at [p. 84. 



the base red S. quadrijyitstidata, 



c*. The sides of pronotum as well as 

 abdomen variegated with yellow 



or orange-yellow S. humeralis c? , p. 81. 



d^. Only 3rd and 4th abdominal seg- 

 ments variegated with yellow . . S. fulrifrons (5, p. 81. 

 b. Wings light brownish, or fusco- or ilavo- 

 hyaline. 

 a'. Head, thorax, and abdomen variegated 

 with yellow, sometimes also with ferru- 

 ginous. 

 a-. Vertex and front of the head wholly 

 yellow. 

 dK Thorax and abdomen variegated 

 with black and yellow only; base of 

 1st abdominal segment tuberculate 

 above ; disc of mesonotum smooth, 

 impunctate S. sil-kimensis, p. 85. 



