FAMILY VI.-LOCUSTID^. 241 



oviposition of this species. He writes: "On September 

 8th I observed a female in the act of oviposition. She was 

 perched with her head turned toward the apex of the gall. 

 Slowly and sedately she thrust her sword-shaped ovipositor 

 down between the leaves, and, after depositing an egg, as 

 slowly withdrew the organ in order to recommence the same 

 operation, after taking a few steps to one side of where she 

 had been at work. She soon observed me and slipped away 

 without completing her task. The number of eggs found in 

 a gall varies considerably. Sometimes but two or three 

 will be found, more frequently from fifty to a hundred. In 

 one such gall I counted one hundred and seventy." The 

 egg is cream colored, very thin, elongate-oval in outline, and 

 measures 4x1 mm. The young emerge about the middle of 

 May and reach maturity toward the middle of August. 

 Long-winged forms are found occasionally. 



Xiphidium nigropleurum Bruner. 



THE BLACK-SIDED GRASSHOPPER. 



A medium sized, rather robust species, easily distin- 

 guished from all others of the genus by its peculiar colora- 

 tion. Two forms occur, one having the pronotum,tegmina 

 and legs bright grass-green, the other with these parts 

 brownish-yellow, the green entirely absent. Both forms 

 have the stripe on the occiput and the sides of the abdomen 

 shining black; the former narrowing in front to the width 

 of the tubercle, and bordered on each side with yellowish- 

 white. In the green forms the usual brown stripe on the 

 disk of the pronotum is but faintly defined ; in the other it is 

 very evident. The tegmina are usually abbreviated, reaching 

 only four-fifths of the length of the abdomen, but an occa- 

 sional specimen is to be found in \vhich the v\,'ings are fully 

 developed and then reach to the extremity of the ovipositor 

 of the female. Ovipositor straight, quite broad and heavy. 

 Male cerci of medium length, rather stout, tapering gently 

 toward the apex, and with a strong sub-basal tooth. 



