NO. 1124. REVISION OF THE MELANOPLT SC UDDER. 137 



/ 2 . Subgenital plate of male very narrow and narrower apieally than the 

 extreme base of the cerci ; supraanal plate on the same general plane 

 throughout; cerci slender and much narrowed in the middle, gradually 

 incurved, exteriorly tumid at apex (24. Plebejus series). 

 (f. Subgenital plate of male, as seen from above, apically angulate and 



tuberculate 109. maryinaiit8 (p. 330). 



2 . Subgeuital plate of male, as seen from above, apically well rounded 



and simple 110. paroxyoides (p. 331). 



d' 2 . Cerci of male apically bifurcate, or with an inferior submedian process or 

 abrupt angulatiou, or else expanded so as to be distinctly, generally much, 

 broader apically than at the extreme base ; furcula wanting or minute, rarely 

 (JLT. arlzonae) a fourth as long as the supraanal plate. 



e 1 . Size small or medium; cerci of male always bifurcate or with an inferior 

 submedian process or abrupt angalation ; supraaiial plate pretty regularly 

 triangular, with straight or feebly convex lateral margins; furcula usually 

 distinctly developed, rarely (M.collinus) wanting; prosternal spine usually 

 short (25. 'Collinus series). 



/'. Lower fork of bifurcation of male cerci much longer than the upper; 

 apical margin of subgenital plate narrowly, abruptly, and considerably 

 ' ;0 elevated. 



ff. Small species; interval between mesosternal lobes of male more than 

 twice as long as broad ; of female quadrate ; median portion of male 



cerci cylindrical, not compressed 111. dlpinm (p. 333). 



g-. Very small .species; interval between mesosternal lobes of male half 

 as long again as broad; of female transverse; median portion of male 



cerci compressed 112. infantilis (p. 335). 



/-. Upper fork of bifurcation of male cerci longer than the lower, which 

 is sometimes merely an inferior median or postmedian process; apical 

 margin of subgenital plate elevated, if at all, only broadly, gradually, and 

 a little. 



</'. Furcula of male distinctly present; apical margin of subgeuital 

 plate distinctly elevated more or less above the lateral margins. 

 h 1 . Furcula of male consisting of slender spines, longer than the last 

 dorsal segment ; base of lateral margins of subgenital plates incurved. 



1 1 . Furcula of male less than a fourth as long as the supraanal plate ; 

 apical half of cerci bent upward from the basal course. 



j ] . Prozona of male subquadrate; supraanal plate with the apical 

 and basal portions in one plane; subgeuital plate of equal or sub- 

 equal breadth beyond the middle 113. minor (p. 337). 



j l . Frozona of male distinctly longitudinal; supraanal plate with 

 the apical portion distinctly elevated above the median ; snbgen- 

 ital plate distinctly narrowing beyond the middle. * 



114. confusm (p. 339). 



1 2 . Furcula of male half as long as the supraaual plate; anal cerci 

 incurved but otherwise straight 115. arizonae (p. 340). 



Ji 2 . Furcnlaof male consisting of brief triangular lobes; base of lateral 

 margins of subgeuital plate not incurved. 



i 1 . Interval between mesosternal lobes of male twice as long as 

 broad ; upper fork of cerci scarcely bent upward above the trend of 

 the basal stem. 



.;'. Upper fork of male cerci much shorter than the stem; sub- 

 genital plate shorter than broad 116. keeleri (p. 341). 



j~. Upper fork of male cerci nearly as long as the stem; subgen- 

 ital plate of equal length and breadth 117. deleter (p. 343). 



i : . Interval between mesosterual lobes of male scarcely longer than 

 broad; upper fork of cerci bent distinctly upward. 



118. Juridus (p. 344). 



