280 Annals Entomological Society of America [Vol. XII, 



wards and forwards. It articulates closely with the dorsal 

 valvulae. The pons valvularum occupies the entire distal half 

 of the intervalvular membrane and is continued cephalad as a 

 slender median process, which meets the under side of the 

 superior interval vula, but does not fuse with it. In some 

 species, such as Tettigonia- verrucivora, according to Dewitz 

 ('75)^^, there is an actual fusion with this plate. The inferior 

 intervalvula is a slender transverse bar, whose outer ends are 

 closely articulated with the rami of the inner valvulae, and less 

 intimately with the inferior apoph^^ses of the superior valvulae, 

 which terminate beyond the articulation in an upwardly bent 

 spine. The dorsal apophyses are larger than in Ceuthophilus, 

 but not essentially different. The valvifer and intertergal 

 apodeme do not differ materially from those of Ceuthophilus. 



The end segments are more elongate than in this genus, 

 the tenth segment and anal valves more prominent. The cerci 

 are shorter and there is a distinct cereal basipodite. 



The female genitalia of Ceuthophilus may be regarded as 

 somewhat more primitive than those of Conocephalus in the 

 following characters: The distinct basivalvulas, the less com- 

 pressed ovipositor and the less complete cohesion of the valvulae 

 due to the absence of the tongue-and-groove joint between 

 the dorsal and ventral valvulae. The more elongate and flexible 

 cerci might also be included, but it is in the males {vide postea) 

 that they show a decidedly aiore primitive form than- in Cono- 

 cephalus. 



Finally, it may be added that in the Tettigonoidea in general 

 the supra-anal plate is not divided transversely into two 

 sclerites, as is commonly the case in the females of Acridioidea, 

 i. e., there is no separate eleventh tergite; and it is not always 

 sharply marked off from the tenth tergite. The paraprocts are 

 generally but little chitinized. 



Grylloidea (Gryllidae) . 



In this group, as in the preceding, the ovipositor is typically 

 long and slender, but, although sometimes compressed and 

 ensiform or falcate, it is usually cylindrical and more or less 

 enlarged apically, the enlarged part armed with teeth. In the 

 Gryllotalpinae or mole-crickets the ovipositor has wholly dis- 

 appeared in adaptation to the subterranean habits. 



" Dewitz, H., Zeits. wiss. Zool., Bd. XXV, pp. 174-200, Taf. 11, 12 (1875). 

 {Tettigonia verrucivora referred to as Lociista viridlissima.) 



