DESCRIPTION OF PLATE XXIII. 



All the figures refer to Phreatoicus australis. 



Fig. 1. Side view of the animal {^), x 6. 

 ,, 2. Upper antenna, x 10. 

 ,, 3. Lower antenna, x 10. 

 ,, 4. Upper lip, x 19- 

 ,, 5. Left mandible (seen from iu front, ie., from above, and partly 



from within) x 45. 

 „ 5a. Extremity of left mandible, showing the cutting teeth, x 45. 

 ,, 6. Lower lip, x 19. 

 „ 7. First maxilla, x 45. 



[Reproduced y>y(i- H. Barrow of the Australian Museum, from original 

 drawings bj' the author, Chas. Chilton, and piintcd liy Heliotype.] 



