EXPLANATION OF PLATE XLII. 
Fie. 1. rox, sp. n.?; North Australia, dorsal view. 
2. Trox omacanthus, lateral view. 
7 ee 45 , dorsal view. 
3. Trox scaber, lateral view. 
3 9» Gorsal views) 
4, Trox penicillatus, dorsal view. 
ce 7. , ventral view of median lobe. 
5. Ceratognathus niger, dorsal view. 
Descriptions on pp. 573, 577, etc. Explanation of the letters 
used uniformly on pp. 481-483. 
