158 STKPHID^. 



9. A cross-baud of greyish pubescence on 



thorax , 10. 



Thorax without such cross-band 11. 



10. Spots on 3rd abdominal segment in cJ 

 triangular or oblong, placed on the 

 anterior margin and reaching side 

 margins ; in $ , spots smaller and 



narrower, but always on anterior margin, solifus, Walk., p. 172. 

 Spots on 3rd abdominal segment {d 2 ) 

 narrower, linear, not reaching side 

 margins, placed transversely over centre [p. 176. 



of segment angiistimarginalis, sp. n., 



11 . Epistorae conspicuously and conically 



produced siimdatus, sp. n., p. 177. 



Epistome only moderately produced .... arbtistonim, L., p. 179. 



12. Eyes striped ' 13. 



Eyes never striped ; either spotted, 



irregularly marked or unicolorous .... 14. 



13. Thorax yellow, with 4 conspicuous black 



stripes ; 3rd abdominal segment mainly 



or wholly black quinqiielineatus, F., var. 



Thorax dull yellowish - grey, with 4 [orientalis, n., p. 183. 



indistinct black stripes ; 3rd abdominal 

 segment mainly yellowish tceniops, Wied., p. 186. 



14. Eyes spotted, or with irregular dark 



markings 15. 



Eyes unicolorous 23. 



15. Eyes in (5 contiguous (presumably so in 



tahanoides, in which cj is unknown) . . 16. 



Eyes in (S comparatively widely separated, sepxdchralis, L., p. 161. 



16. Obviously black or seueous species 17. 



Black and yellow species (black and grey 



in tahanoidps) 19. 



17. Abdomen uniformly osneous, without spots. tapMcus, Wied., p. 162. 

 Abdomen with grey or whitish spots . . 18. 



18. Abdominal spots obliquely placed obliquiis, Wied., p. 164. 



Abdominal spots transversely placed .... Icetus, Wied., p. 165. 



19. Second, 3i'd and 4th abdominal segments 



all orange except for a clear-cut posterior 



margin and a median stripe : no arcuate [p. 180. 



whitish bauds present pohjchroviahis, sp. n., 



Second, 3rd and 4th segments never all 

 orange, the markings never rectangular ; 

 arcuate whitish bands niu'mally present 20. 



20. Femora normally all orange or brownish- 



orange arvornm, Fabr., p. 181. 



Femora black ; tip generally more or less 

 pale ■ 21. 



21. Thorax and abdomen yellow and black . . 22. 

 Thorax and abdomen whitish-grey, with 



black stripes aud bands, practicalh" no [p. 189. 



yellow present tubanoides, Jaenn., 



22. Tarsi yellowish-white nearly to tips ; 



abdomen comparatively shorter, more [p. 187. 



ovate-conical quinqiiestriatvs, Fabr., 



Tarsi black, at most pale at base ; abdomen 

 comparatively longer and narrower, more [p. 190. 



elongate-conical obscuritdrsis, de Meij., 



