REHN AND HEBARD 213 



The descriptions by Fox of this species and C. nigropleuroides 

 are complete, thorough and very different from the usual care- 

 less and insufficient descriptions of the species of the present 

 genus. 



The present species bears a very decided general resemblance 

 to C. brevipennis, so close that, until studied by Fox, virtually 

 all of the material in collections had been confused with that 

 species. When compared with brevipennis, we find that spar- 

 tinae differs signally in the male cerci, while females may usually 

 be separated by the ovipositor which normally shows a very 

 weak but appreciable curvature, this appendage in brevipennis 

 being normally straight. In addition, material of the present 

 ■species from the North Atlantic coast is small and more slender 

 than brevipennis, but in southward distribution it attains a size 

 quite as great as the largest examples of that species. The pro- 

 notum is much as in brevipennis but has the lateral lobes not 

 quite as deep with the ventro-caudal angle rather sharply rounded, 

 the tegmina are more delicate (not quite as delicate as in C 

 aigialus), with the male tympanum having the stridulating 

 vein distinctly longer, this area being slightly more transverse 

 in proportion to the length than in brevipennis — -this is true of 

 aigialus which, however, has the tympanal area appreciably 

 smaller. The distinctive male cerci show at once that the 

 position of the species is in group C, while brevipennis belongs to 

 group A. These cerci are slender and symmetrical, an elongate 

 bulbous swelling occupies the mesal half, at the base of which is 

 ■situated interno-ventrada small slender tooth directed mesad with 

 a very weak inclination proximad, the extei-nal margin of the 

 cercus is moderately concave, beyond the bulbous area the cercus 

 is weakly depressed, this distal portion with sides subparallel 

 to the broadly rounded apex. These cerci differ from those of 

 brevipennis not only in shape ])ut in coloration as well, being 

 bright green except in the darkest individuals in which they are 

 pale olive. 



In coloration, material from New Jersey often shows an inten- 

 sive condition, in this the medio-dorsal stripe of the head and 

 particularly the pronotum is very broadly margined by pale 

 buff, and below this the lateral lobes of the pronotum are marked 



TRANS. AM. ENT. SOC, XLI. 



