166 Journal of Entomolog>' and Zoology 
PLATE I. 
Figure 1. Shows progress in excavating tunnels: a, bottom of newly begun tunnel 
when found; b, bottom of same tunnel after six days of work. Nat. size. 
Figure 2. One of the partitions as viewed from the entrance of the burrow. 
Figure 3. X. orpifex larva in non-feeding stage with bombyliid larva attached. Nat. 
size. 
Figure 4. Same as Fig. 3, but five days later, showing X. orpifex larva reduced to 
empty skin and parasite larva fully grown. Nat. size. 
Figvire 5. Pupa of bombyliid. X2. 
Figure 6. An egg of X. orpifex with outline of developing embryo inside. X3. 
PLATE IL 
Figure 7. A tunnel of Xylocopa orpifex showing where the worker did not follow the 
grain of wood. Nat. size. 
Figures S-9. Show two pieces of l^-inch boards with one surface hewn away to show 
work of X. orpifex . X shows position of surface entrances with a 
number of tunnels from each, reduced. 
FigurelO. .Adult of bombyliid parasite. 
Figures 1 1-12. Larva of X. orpifex with bombyliid larva attached: much enlarged. 
Pupa of X. orpifex; much enlarged. 
Figure H. Larva of X. orpifex with bombyliid larva attached. Much enlarged. 
Figures 11 and IJ from drawings by Margaret L. Moles. 
