172 Mr. G. C. Champion on 



a. Prothorax not or obsoletely canaliculate 



on disc Nos. 44-60. 



b. Prothorax distinctly canaliculate on disc . Nos. 61-65. 

 9. Species elongate, with opaque black head 



and prothorax and purplish or dull black 

 elytra, the latter bearing small rounded 

 tubercles, the legs long Nos. 66, 67. 



10. Species with a short, broad head and pro- 



thorax, metallic elytra, and stout an- 

 tennae ^ No. 68. 



11. Species castaneous in colour, A\ith broadly 



viridi-vittate elytra and stout antennae . Nos. 69, 70. 



12. Species testaceous or browTi, with the elytra 



(except in vars.) infuscate or metallic along 



the sides, and the antennae slender. 

 a. Head and prothorax shining .... Nos. 71, 72. 

 6. Head and prothorax opaque, scabrous . No. 73. 



13. Species testaceous, reddish, or brown, with 



the legs partly infuscate. 



a. Prothorax densely, more coarsely punctate No. 74. 



b. Prothorax finely scabroso -punctate or 



almost smooth Nos. 75, 76. 



14. Species testaceous or reddish-brown, the 



legs included. 



a. Prothorax feebly shining; eyes subap- 

 proximate No. 77. 



b. Pi'othorax opaque, alutaceous; eyes 



distant No. 78. 



15. Species testaceous, with blackish, flavo- 



vittate elytra, the upper surface dull . . No. 79. 



16. Species castaneous or piceous, shining. 



a. Elytra with each alternate interstice more 



or less tuberculate throughout .... No. 80. 



b. Elytra with scattered setigerous impres- 

 sions, sometimes nigro-lineate .... Nos. 81-86. 



17. Species with red head and prothorax and 



blue or green elytra. 



a. Anterior tibiae compressed at base ; abdo- 



men black No. 87. 



b. Anterior tibiae simple ; prothorax (cJ) with 



two scabrous patches on disc . . . No. 88. 



^ The Mexican S. crassicornis, Champ, and the Colombian 

 S. validicornis, Makl. belong to this section. 



