U.1124. REVrSTOy OF THE MELANOni—SCl DDER. % 



h 



ANALYTICAL KEY TO THE GENERA OF NORTH AMERICAN MELANOPLI 

 (INCLUDING THE OLD WORLD F^'^HMS).* 



A'. Lntoral margins of snbjjenital plate (last ventral sefjinent') of male, as seen later- 

 ally, straijrht throughout, or very slightly convex, never at all abrui)tly ampliate 

 at tlie base. 



?»'. Bony exceptionally slender; mesosternal lobes subattingent in both sexes; pro- 



zona three times as long as metazona 1. (;//mn(><«cJr/<7r» (p. 14). 



h-. Body not exceptionally slender; mesosternal lobes in both sexes so widely sep- 

 arated that the interspace between them is at most twice as long as broad ; prozona 

 not more than tvVice as long as metazona, 

 c'. Interspace between mesosternal lobes of female decidedly transverse, some- 

 times twice as broad as long; of male sometimes transverse, sometimes (luadrate 

 or siilxiuadrate; tegmina lobiform, linear, or wanting. 



rf'. Interspace between mesothoracic lobes of male decidedly transverse, as 

 broad as or broader than the lobes; the pronotum without latcnil carinae; 



tegmina ovate or wanting 2. Netromma (p, 16). 



(V. Interspace between niesothoracic lobes of male (piadrate or siibijuadrate, 



or, if feebly transverse (as in Taradicbroplns), not sc broad as thf lobes, and 



then the ]tronotnni furnished with lateral carinae; tegmina ovate or linear. 



eK Subgenital ])late of male pyranndal, pointed, a slight tubercle extending 



beyond its ])osterior margin, but the margin extending well beyond the apex 



of the supraanal i)late 3. Paradichroplna (p. 18). 



e-. Subgenital plate of male more or less conically protuberant apically, but 

 its iut«'rior apical margin not surpassing or liarely surpassing the apex of the 

 supraanal plate. 



/'. Apical tubercle of subgenital plate small, extending but a short dis- 

 , tance beyond the supraanal plate; cerci of male abruptly narrowed before 

 the middle by excision of the inferior margin, the apical half narrow; lat- 

 eral carinae of pronotum wholly wanting 4. Phaedrotettir (p. L'2), 



/•^. Nearly the whole subgenital plate forming a blunt conical tubercle 

 projecting some distance beyond the supraanal ]date; cerci of male form- 

 ing broad, apically decurved, subfalcate laminae; lateral carinae of pro- 

 notum more or less distinct 5. Conalcaea (p. 23, ) 



c"-. Interspace between n'esosternal lobes of female generally longer than broad, 

 somerimes quadrate rarely feebly transverse - ; of male never at all transverse 

 (except feebly in Sinaloa and Ce])halotettix) ; tegmina variable, 

 rf*. Tegmina never fully developed, rarely as long as the pronotum, lateral 

 and ovate, or linear, or wholly wanting; hind margin of pronotum distinctly 

 truncate; fore and middle femora of male (except in Phaulotettix) distinctly 

 more gibbous than in the female. 

 e'. Furcula of male wanting or forming a pair of brief lobes at most no 

 longer than broad. 



' By permission of the Assistant Secretary this key has been issued in advance in 

 tilt' Pnxecdings of the American Academy, XXXII, No, 9. 



- tephalottttU, in which the female is unknown, is placed in this division. 



