66 Annals Entomological Society of America [Vol. XV, 



traced along the front margin of the valvifer, and the apodeme 

 which runs along this boundary line is frequently continued 

 along the front margin of the valvifer. Chopard's "piece 

 laterale" in the Blattoidea and Mantoidea is the same structure 

 and is likewise ascribed by him to the 8th sternum. The "piece 

 laterale en baguette" is the valvifer together with the inter- 

 segmental apodeme which in the Blattids crosses a wide mem- 

 branous area between the valvifer and the tergal margins. 



Position of the genital aperture in the Blattoidea and Man- 

 toidea. Chopard maintains that the genital aperture in these 

 groups lies between the 7th and 8th sterna, instead of occupy- 

 ing its usual position between the 8th and 9th. This is a subject 

 upon which I did not lay sufficient stress in Part I of this paper. 

 The aperture in question has certainly experienced a forward 

 shifting, as it lies distinctly cephalad of the bases of the ventral 

 valves of the ovipositor, and is overhung by the "epigynum," 

 which I agree with Chopard in considering as the homologue 

 of the subgenital plate of the Orthoptera. But, as I consider 

 this plate to belong to the 8th sternum rather than the mem- 

 brane between the 8th and 9th sterna, I should describe the 

 genital aperture as occupying the 8th sternal area, although 

 the sternum itself has virtually disappeared as an individual 

 sclerite. The position of the genital aperture in the Orthoptera 

 and Grylloblattoidea is not really fundamentally different 

 from this. 



Ovipositor of the Isoptera. Since Part I of the present paper 

 was published an interesting article by Crampton appeared 

 entitled "The Terminal Abdominal Structures of the Primitive 

 Australian Termite, Mastotermes darwinensis Froggatt (Cramp- 

 ton, '20). The important fact brought out is the presence in 

 females of the solider caste in this species of three pairs of 

 gonapophyses of distinctly primitive form, the lateral pair 

 (dorsal valvulas) terminating in well developed styli. As 

 shown in Crampton 's figure the resemblance to the immature 

 Blattid or Mantid is unmistakable, much closer than to Gryllo- 

 blatta, although all of these four types are much alike in essen- 

 tials. The short, broad lateral gonapophyses, clearly forming 

 part of the 9th sternum, and the reduced 8th sternum, over- 

 lapped by the large 7th sternum, are strongly Blattoid features. 



