1922] Walker: Structure of Orthopteroid Insects 67 



The presence of these gonapophyses in Mastotermes is a 

 clear proof of their having been present in the ancestral ter- 

 mites, and confirms my interpretation of the extremely rudi- 

 mentary structures in Termopsis, which I took to represent a 

 vestigial ovipositor. 



ERRATA— PART I. 



P. 286, 11th line from bottom; R. forcipata is an error for 

 R. forceps Sauss. The species figured, however, is R. car- 

 bonaria Sauss. 



P. 315, 13th line from bottom; for "Ripipteryx forcipata 

 Sauss." read "Ripipteryx carbonaria Sauss." 



P. 316. The explanation of Fig. 34, as given, applies to 

 Fig. 35, that of Fig. 35 to Fig. 36, and so on to the end, the 

 last figure being No. 75, instead of 76. The correct explanation 

 of Fig. 34, which was omitted, is as follows: 



34. Same; ventral view of dorsal and inner valvulee. 



