382 



BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



2 Posterior lateral horn of the metafurca. 



3 Lateral wing of the metafurca. 



4 Median lamina of the metafurca. 



The >|< is used in Figure 13 to indicate the place where teeth on the inner sur- 

 face of the elytron interlock with teeth on the outer surface of the thorax, thereby 

 holding the elytron in position. 



The table given below shows in a comprehensive manner the relative develop- 

 ment of all of the animals used in making drawings. Where figures are bracketed 

 together, all of the figures embraced in the bracket were drawn from the same 

 animal. In all, twenty-three specimens were used in making the fifty-three 

 figures. 



