SYNOPSIS OF SPECIES OF LISTRUS 177 



3. Dark elytral maculae small and few in number, pubescence otherwise 



cinereous 15. confusus Casey 



. Dark elytral maculae well developed 4 



4. Tibiae and tarsi clear rufous ; lustre more or less cupreous ; antennae 



similar in the sexes, fifth joint scarcely wider than the contiguous 



Joints 16. extricatus Casey 



. Tibiae and tarsi more obscure, black to rufo-piceous in color 5 



5. Elytra with submedian and subapical fasciae 17. difficilis Lee. 



. Elytra without two distinct fasciae 6 



6. Elytral subapical fascia alone distinct ; submedian resolved into two strongly 



V-shaped maculae ; pubescence dense and very coarse 18. fidelis Casey 



. Elytral dark areas in large maculae; pubescence rather short, sparse and 



readily removable 19. subaeneus Casey 



7. Tarsi and distal part of tibiae rufous 8 



. Tarsi and tibiae more or less piceous 9 



8. Submedian elytral fascia zig-zag, narrow, V-shaped on each elytron; sub- 



apical forming a moderate rhomboidal macula on the suture, apical 



maculae rather large ; tarsi and tibiae rufous _ 20. vestitus, n. sp. 



. Submedian and subapical fasciae transverse, the latter rather broad; tarsi 



and distal half of tibiae rufous or paler 21. incertus Casey 



9. Size larger. Pubescence noticeably long; elytral maculation complex, sub- 



apical fasciae broken into four rather large maculae, the two median of 



which may form a subcordate macula on the suture 10 



. Size smaller; elytral pattern simpler 12 



10. Form different in the sexes; male rather narrow, parallel and elongate; 



female oblong-ovate ; second antennal joint a half longer than wide, third 

 obconic, fourth distinctly triangular; pubescnce quite abundant on ab- 

 dominal apex 22. bifasciatus, n. sp. 



. Form somewhat similar in the sexes ; male oblong-oval ; female oblong- 

 ovate; antennae similar in the sexes; third and fourth antennal joints 

 elongate and subequal in length 11 



11. Fifth antennal joint distinctly longer than wide at apex. Surface with a 



purplish metallic reflection; fifth ventral segment broadly truncate at 



apex; pale elytral fasciae narrow and distinctly zig-zag 23. pardalis Casey 



. Fifth antennal joint about as long as wide at apex. Surface with a bluish- 

 metallic reflection; fifth ventral broadly and feebly sinuato-truncate ; pale 



elytral areas broader about the more or less round maculae 



24. ntotschulskii Lee. 



12. Elytra distinctly fasciate with dark hairs 13 



. Elytra not fasciate, but with discrete maculae that are more or less 



atrophic 16 



13. Upper surface of body shining and polished; surface with a greenish- or 



bluish-metallic lustre 14 



. Upper surface more or less dull and with a cupreous or violaceous lustre.... 15 



14. Elytra with three distinct and rather broad transverse fasciae, the basal 



narrowly interrupted at scutellum, post-basal maculae obsolete ; pronotum 



quite strongly convex 25. simplex, n. sp. 



. Elytra without three fasciae; pubescence short, sparse, maculation rather 

 obscure ; punctures at middle of pronotum sparse, intervals more or less 

 punctulato-rugulose _ 26. interstitialis Casey 



