KNOWN SPECIES OF BOLBOCERAS. 29 



petites ; " and on the crown is a " corne courte, large, obtuse ou echancree," and the 

 prothorax with four " petites elevations obtuses a la partie anterieure et une ligne longi- 

 tudinale enfonc6e a la partie superieure." Erom these characters it appears to me that 

 the species is very closely allied to, if not identical with, Scar. Melibceus, Eabr. ; indeed, 

 since the above remarks were written, M. Chevrolat of Paris has sent me a specimen 

 labelled "Lazarus, Eabr. c?," which differs only from the typical specimens of Scar. Meli- 

 bceus, Eabr., in being rather larger and apparently rather broader. I can, however, detect 

 no specific distinctions between them. 



DESCRIPTION OP THE PIGURES. 



Tab. III. 



Fig. 15. Bolboceras Cyclops, Fabr. 



Fig. 16. Bolboceras furcicollis, De Lap., mas. 



Fig. 17. Bolboceras furcicollis, var. 



Fig. 18. Bolboceras ferrugineus, De Lap. 



Fig. 19. Bolboceras Calanus, Hope, MS. 



Fig. 20. Bolboceras capitatus, Westw., mas. 



Fig. 21. Bolboceras capitatus, Westw., foem. 



Tab. IV. 



Fig. 1. Details of Odontceus mobilicornis. 



Fig. 2. Details of Bolboceras jEneas. 



Fig. 3. Bolboceras grandis, Hope, MS. 



Fig. 4. Bolboceras subglobosus, Westw. 



Fig. 5. Bolboceras carinicollis, De Lap. 



Fig. 6. Bolboceras Calanus, Hope, MS., foem. ? 



Fig. 7. Bolboceras Calanus, Hope, foem. var. ? 



Fig. 8. Bolboceras Icevicollis, Westw. 



Fig. 9. Bolboceras punctatissimus, Westw. 



Fig. 10. Bolboceras lateralis, Westw. 



Fig. 1 1 . Bolboceras nigricans, Westw. 



Fig. 12. Bolboceras politus, Westw. 



Fig. 13. Bolboceras Coryphaus, Fabr. 



Fig. 14. Bolboceras inaqualis, Westw. 



Fig. 15. Bolboceras bicarinatus, Westw. 



Fig. 16. Bolboceras dorsalis, Westw. 



Fig. 17. Bolboceras nigriceps, Westw. 



Fig. 18. Bolboceras transversalis, Westw. 



Fig. 19. Bolboceras Indicus, Hope, MS. 



