ORTHOPTEEA OF INDIANA. 287 



1). Size large, the length of tegmina of female 27 or more mm. 



Lobes of mesosternum longer than broad, the inner margin 



straight. Sub-genital plate of male with a distinct U or V- 



shaped notch on its upper side. .XXXVI. Schistocerca, p. 289 



bh. Size small or medium, the tegmina never over 25 mm. in length. 



Lobes of mesostei'num transverse or equally long and broad, 



the inner margin usually rounded. Apex of sub-genital plate 



of male without a notch on its upper side. 



c. General color when living, a bright, pale green, with a 



conspicuous purple line along the top of pronotum and 



dorsal part of closed tegmina. Vertex at its narrowest 



point between the eyes less than one and one-half times 



the width of second joint of antennte. Sub-genital plate 



of the male with a more or less distinct sub-apical 



tubercle XXXVII. Hesperotettix, p. 297 



cc. Color usually dull, chiefly brownish or olivaceous. Vertex 

 at its nan'owest point between the eyes more than twice 

 the width of second joint of antennae. Sub-genital plate 

 of male without a sub-apical tubercle. 

 (1. Dorsal surface of pronotum never twice as long as 

 the average breadth, generally only half as long 

 again; the sides more or less constricted in the mid- 

 dle. Antennae of male, less than twice the length 

 of pronotum. Sub-genital plate of male with the 

 apex rounded. 



e. Head not large in proportion to pronotum, but 

 little longer than the prozona. Pronotum not 

 enlarged in front to receive the head. Cerci 

 of male exceedingly variable, but very rarely 



stylif orm XXXVIII. Melanoplus, p. 298 



ee. Head swollen; large in proportion to the pro- 

 notum, nearly half as long again as the long 

 prozona. Pronotum feebly flaring in front to 

 receive the head. Cerci of male stylif orm .... 



XXXIX. PHGETAI.I0TES, p. 334 



dd. Dorsal surface of pi'onotum twice as long as average 

 breadth; the sides parallel. Antennae of male twice 

 or more times as long as pronotum. Sub-genital 



plate of male broad, the apex truncate 



XL. Paroxya, p. 335 



XXXV. Leptysma Stal (1873). 



Body slender, sub-cylindrical. Head as long as pronotum; the 

 vertex prominent, projected in front of the eyes in the form of an 

 equilateral triangle; the lateral carinre low, the median carina want- 

 ing. Face very oblique, the frontal costa low, a little narrowed be- 

 low the ocellus, shallowly sulcate throughout; eyes longer than wide, 

 set very obliquely on the head. Antennae shorter than head and 



