433 



Mctastcniuin (Figs. 40, 42). — This sclerite is even more pro- 

 foundly modified and distorted than the mesosternum. The meta- 

 coxae are almost contiguous and the muscles attached to the meta- 

 sternum along the meson have drawn it well into the interior. The 

 metafurcae can only be seen upon dissection of the thorax, and are 

 to be found closely approximated along the ventro-meson. The pre- 

 furcae (mtpf) ^re a short distance cephalad of the furcae (mtfi). 

 The presternum and sternum are fused, and the cephalo-lateral arms 

 extend around the cephalic margins of the coxae and unite with the 

 metinfraepisterna. The sternellum is represented in each sclerite 

 niesad of the caudal half of the metacoxae, the caudal boundary being 

 marked by two nearly contiguous chitinized spots on the meson (Figs. 



40,42). 



Intersternum (Figs. 40, 42; ints). — The closing together of the 

 metepimera has apparently resulted in the isolation of a portion of the 

 sternum, near the abdomen. Comparisons with the thorax of 

 Orthoptera and other orders show that this may be a portion of the 

 abdomen, but in this case it is probably the cuticular membrane de- 

 veloped between the abdomen and thorax. The possibility that this 

 sclerite represents an extra abdominal segment has already been dis- 

 cussed under the description of the nymphal thorax. The name inter- 

 sternum has been applied to this area. 



Postcoxal Area. — The area on the thoracic venter between the 

 lateral carinae, caudad of the metacoxae and cephalad of the first ab- 

 dominal sternum, is the postcoxal area. 



Legs. — The legs are long and comparatively slender, and have 

 long setae arranged regularly in rows (Fig. 35). They are not adapted 

 for walking or running. 



Coxae (Fig. 35, ex). — The coxae are large and globular, and there 

 are prominent ridges on the lateral surfaces of the procoxae and the 

 caudo-lateral surfaces of the mesocoxae and metacoxae. 



Trochanters (Fig. 35, tr). — The trochanters are much smaller than 

 the coxae and are divided into two short pieces in all families. The 

 ventral length of both portions is much greater than the dorsal. 



Femora (Fig. 35, fe). — The femora are long and cylindrical and 

 without carinae except in a few genera. The ventral surface is pro- 

 vided with two rows of long black setae (fs), varying in number from 

 three or four on the fore tibiae to as many as sixteen or seventeen on 

 the hind tibiae. 



Tibiae (Fig. 35, ti). — The tibiae are likewise long and slender and 

 have a double row of setae on the ventral surface. In the fore tibiae 

 of most species the setae of the cephalo-ventral row are conspicuously 



