290 Annals Entomological Society of America [Vol. XII, 



being slightly separated from one another along the mid-ventral 

 line and from the dorsal valvulse along their entire length. 

 The dorsal valvulas do not overlap the ventral valvules on the 

 sides, so that the inner valvulae are not concealed as in the 

 Tettigoniidae. The inner valvulas are a little shorter than the 

 ventral, with which they are connected by a tongue-and-groove 

 joint of the same character as in Ceiithophilus, i. e., there is a 

 narrow groove with raised edges along the upper margin of the 

 ventral valves, into which fits a ridge along the lower margin of 

 the inner valves. 



In order to study the inner connections of the valvulas the 

 abdomen of the original paratype specimen was cut across at 

 the base of segment seven, and the posterior segments treated 

 with potash. 



Fig. 32 shows the ovipositor in dorsal view, with the left 

 ventral valve forcibly turned outwards; the right valve is 

 omitted. The dorsal- valves are separate from one another 

 except near the base, where they meet at little more than 

 a point, the inner margins then diverging again. The superior 

 apophyses are very like those of Ceuthophiliis (Fig. 1) and the 

 articulations with the valvifer quite similar. The inferior 

 apophyses are prolonged inwards into a pair of slender curved 

 bars, which meet one another in the middle line. These evi- 

 dently represent the inferior intervalvula, but are in no way 

 distinct from the apophyses. 



The inner valvulae fit closely into the concavities of the 

 dorsal valvulas, there being no space between the two pairs 

 such as we usually find (cf. Ceuthophilus). The intervalvular 

 membrane is well-developed as is also the pons which unites 

 the rami just beneath the point where the dorsal valvulae meet. 

 The median part of the pons projects below from the upper 

 surface, as a bilobed prominence (Fig. 35, pp), which recalls 

 the transverse thickened portion of the superior intervalvula 

 in the Mantids (Figs. 35, 49). No median apodeme could be 

 found, however, and it is to this apodeme that the muscles 

 arising from the valvifers are attached in the Mantidas, Tetti- 

 goniidas and Gryllidse. This apodeme, when present, is situated 

 between the valvifers, the muscles running transversely and 

 if such an apodeme were present in this position in Grylloblatta it 

 would lie considerably in front of the bilobed prominence. 



