PEATE Vs 
Fig. 14. Entrance to a burrow with the male in the “ guarding posi- 
tion” as seen from without. The male’s body nearly completely fills 
the opening, the elytral declivity lying parallel with the bark and armed 
with the three pairs of spines presents an impregnable appearance. 
Magnified 25 dia. 
Fig. 15. Diagram of the entrance burrow and nuptial chamber exca- 
vated by the male. Magnified 12 dia. 
Fig. 16. Male and female of P. hopkinsi in copulation. The female 
lies in the egg-gallery while the male is in the nuptial chamber. Magni- 
fied 12 dia. 
Fig. 17. Mandible of embryo larva, twenty-four hours before time of 
hatching. Magnified 259 dia. 
Fig. 18. Middle leg of adult male, intended especially to show the 
character of the tibia. Magnified 93 dia. 
