126 PROCEEDINGS OF THE NATIONAL MUSE I'M. 



i 2 . Cerci rather slender, especially on apical half, of unequal width. 

 j ] . Tegmina shorter than the pronotum, broadly ronnded or sub- 

 angulate at apex; cerci long and rather slender, nearly straight as 



seen laterally 44. mancua (p. 218). 



/ 2 . Teginina as long as or longer than the pronotum, apically 

 acuminate; cerci short and not very slender, rather strongly bent- 

 arcuate as seen laterally 45. cancri (p. 219). 



/ 2 Subgenital plate of male distinctly narrower than long, often narrow- 

 ing apically. 



g l . Cerci of male tapering but little, generally rather stout, or if slen- 

 der then tapering almost not at all in apical half, which is never less 

 than half as broad as the base and is blunt-tipped, rarely, as in M. 

 jurencus, augulate below. 



h l . Interval between mesosternal lobes of male at least half as long 

 again as broad, sometimes fully twice as long; hind tibiae usually 

 blue or green (12. Dawsoni series). 



i l . Cerci of male apically turned sharply inward at right angles or 



even less 46. rejiexus (p. 221). 



i' 2 . Cerci of male straight or gently incurved, sometimes curved 

 more strongly at apex but not bent abruptly at right angles. 

 j l . Lateral margins of subgenital plate of male, as seen from 

 above, regularly convergent nearly to the tip; furcula developed 



only as slightly swollen lobes 47. meridionalis (p. 223). 



j' 2 . Lateral margins of subgeuital plate of male, as seen from 

 above, basally subparallel, apically rather broadly rounded; fur- 

 cula developed as a pair of projecting spines or fingers. 



k l . Tegmina much shorter than the pronotum, widely separated ; 

 interval between mesosternal lobes of female distinctly trans- 

 verse, as broad as the lobes ; subgenital plate of male wrth dis- 

 tinct though minute apical tubercle 48. militaris (p. 224). 



A; 2 . Tegmina longer than the pronotum, overlapping; interval 

 between mesosternal lobes of female quadrate; subgenital plate 

 of male with minute apical tubercle or none. 



I 1 . Subgenital plate of male not pyramidal, nor elevated 

 apically except by a minute apical tubercle ; furcula minute, 

 overlying the supraanal plate by a less distance than the 

 length of the last dorsal segment; cerci bent roundly inward 



at the apex 49. niyrcscens (p. 225). 



1-. Subgenital plate of male subpyrauiidal, broadly and 

 roundly elevated at apex; furcula well developed, reaching 

 middle of the supraanal plate; cerci very feebly incurved api- 

 cally 50. dawsoni (p. 227). 



A 2 . Interval between mesosternal lobes of male subquadrate, often 

 gradually widening posteriorly; hind tibiae usually red (13. Kusticus 

 series). 



i 1 . Apical margin of subgenital plate of male more or less elevated 

 or tuberculate or both, generally well rounded as seen from above, 

 never transverse. 



j 1 . Tegmina attiugent or overlapping; cerci of male apically 

 rounded ; furcula distinctly developed ; subgeuital plate relatively 

 long, subequal in breadth. 



k 1 . Interspace between the eyes of male broader than the first 

 antennal joint; cerci of male with arcuate upper margin; sub- 

 genital plate apically elevated to a greater or less degree, but 

 never conspicuously. 



