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3. The posterior margin of pronotum without marginal ridge. 



Elytra with scutellum and its nearest surroundiogs black, 

 a large spot on the humerus, and the posterior margins 



light yellow. L. 5-6 mm 1. B. lunulatus Linn. 



Posterior margin of pronotum with fine marginal ridge. Scutellum 

 red; elytra black, a broad transversal band over base light 

 yellow 4. 



4. Dorsum-stripe of elytra with 8-12 punctures. The species lar- 



ger than lunulatus . L. 8-9 mm 2. B. speciosus Er. 



Dorsum-stripe of elytra with 4-6 punctures. The species often- 



est smaller than lunulatus . L. 4-6 mm. .3. B. pulchellus Mannh. 



5. Posterior margin of pronotum with fine ridge 6. 



Posterior margin of pronotum without ridge 7. 



6. Abdomen black or pitch-black, posterior margins of joints 



reddish-brown. Dorsum-stripe of elytra with 10-12 punctures. 



L. 4-5.5 nm 4. B. trimaculatus Payk. 



Abdomen red-brownish. Dorsum-stripe of elytra with 8-10 punc- 

 tures. L. 4-5.5 mm 5. B. trinotatus Er. 



7. Dorsum-stripe of elytra with 16-12 punctures. Next-last joint 



of antennae scarcely transverse. L. 3.5-5 mm 



6. B.exoletus Er. 



Dorsum-stripe of elytra with 4-6 punctures. Next-last joints 



of antennae distinctly transverse. L. 2.5-4.5 mm 



7. B. pygmaeus Fabr. 



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