680 Mr. J. O. Westwood on the Paussidce, 



Fig. 4. The same, seen from below, exhibiting the structure of 

 the lower parts of the mouth. 



5. The labrum, mandibles, and lower part of the face, more 



highly magnified. 



6. The mandible, ditto. 



7. The maxilla and its palpus. 



8. The mentum, labium, palpi, and their scapes, seen from 



below. 



9. The same, seen from within the mouth. 



10. The same, seen sideways. 



11. The under-side of the trunk {thorax Linn.) 



12. The head and pro thorax, seen sideways. 



13. The coxa (r), the biarticulate trochanter {sScs), and the 



femur of the hind leg. 



14. The tarsus. 



15. to 20. Details of a species of the genus Paussus of the 2nd 



section. 



15. Under-side of the head. 



16. The labrum. 

 17- The mandible. 



18. The maxilla, showing its insertion on the outside of the 



produced lobe of the mentum. 



19. The instrumenta labialia mihi, or lower organs of the 



mouth, seen from beneath : half of the mentum and 

 neck is removed, to show the insertion of the labial 

 palpi. 



20. The lower organs of the mouth, seen from within, with 



one of the lobes of the mentum. 



21. Head, thorax and base of the elytra of Paussus micro- 



cephalus. 



22. Paussus Linnai. 



23. Antenna of ditto, seen from the front. 



Fig. 24. 



