322 FAMILY VI. ACRIDIME. THE LOCUSTS. 



their greatest width; metazona almost smooth; tegmina 

 represented by small pads or wholly absent. 



VI. PODISMA, p. 340. 



ee. Interspace between the mesosternal lobes distinctly longer than 

 broad in male, generally quadrate in female, in both sexes al- 

 ways much narrower than the lobes themselves; tegmina va- 

 riable in length. 



g. Face rather strongly oblique; eyes almost or quite twice as 

 long as broad; tegmina linear and widely separated or 

 wholly absent. VII. APTENOPEDES., p. 344. 



gg. Face almost vertical or slightly oblique; eyes rounded, never 

 more than one and one-half times longer than broad; teg- 

 mina always present, rarely linear. 



h. Fastigium of vertex flat or convex; eyes widely separated, 

 the interocular space twice as broad as the frontal costa; 

 lateral carinse distinct on both pro- and metazona; teg- 

 mina short, nearly as broad as long; cerci apically 

 acuminate. VIII. PARATYLOTROPIDIA, p. 348. 



hh. Fastigium more or less depressed, its side margins feebly 

 elevated; eyes narrowly separated, the interocular 

 space but little wider than frontal costa; lateral carinse 

 of pronotum rarely present; tegmina variable in length. 

 i. Dorsal surface of pronotum twice as long as the average 

 breadth, the sides parallel; antennae of male twice or 

 more times as long as pronotum; subgenital plate of 

 male broad, the apex truncate (PI. IV, t.) 



IX. PABOXYA, p. 349. 



ii. 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 middle; an- 

 tennae of male less than twice the length of prono- 

 tum; subgenital plate of male with the apex usually 

 rounded. 



j. Head swollen, large in proportion to the pronotum, 

 nearly half as long again as the long prozona; pro- 

 notum feebly flaring in front to receive the head; 

 cerci of male styliform; subgenital plate very nar 

 row, the apical margin not elevated (PI. IV, s.) 



X. PlICETALIOTES, p. 356. 



jj. 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 styliform; subgenital plate 

 never very narrow, often very broad, its apical mar- 

 gin usually elevated. XI. MELANOPLUS, p. 358. 



T. GYMNOSCIRTETES Scudder, 1897a, 195. (Gr., "naked" -f- 



"to leap.") 



Long, slender, subcylindrical species, having the vertex feebly 

 convex, triangular, the interocular area very narrow, sulcate in 



