128 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



t 1 . Tegmina more or less widely separated, rarely attingent; inter- 

 val between mesosterual lobes of male twice or nearly twice' as long 

 again as broad; cerci not finely acuminate at tip. 



64. fit stipes (p. 247). 



t 2 . Tegmina attingent ; interval between mesosternal lobes of male 

 only slightly longer than broad ; cerci tapering, rather regular, sub- 

 falcate, finely acuminate at tip 65. scitulua (p. 249). 



e 2 . Cerci of male feebly compressed, substyliform, tapering almost uniformly 

 throughout, apically acuminate (15. Puer series). 



f l . Tegmina attingeut; subgenital plate of male short and broad, its apical 

 breadth surpassing the length of its lateral margin, not elevated apically. 



06. flabellatus (p. 251). 

 / 2 . Tegmina distant; subgenital plate of male distinctly narrower than 



long, elevated apically 67. puer (p. 252). 



c 2 . Cerci of male more or less expanded apically, so as to be broader at some 

 point beyond the middle than at the middle, spatulate or subspatulate ; meta 

 sternal lobes of male separated by a variable interval. 1 



d 1 . Interval between mesosternal lobes of male quadrate or subquadrate, rarely 

 (M. amplectens) half as long again as broad; nietasternal lobes of male of 

 variable width. 



e 1 . Subgenital plate of male distinctly narrower than long, often narrowing 

 apically. 



f l . Lateral margins of subgenital plate of male apically meeting more or 

 less acutely and furnished here with a conical erect tubercle (16. Inornatus 

 series). 



y l . Interval between mesosternal lobes of female slightly longer than 

 broad; anal cerci of male broadly expanded apically ; apical tubercle of 



subgeuital plate of male blunt 68. inornatus (p. 254). 



# 2 . Interval between mesosternal lobes of female distinctly transverse; 2 

 anal cerci of male very feebly expanded apically; apical tubercle of 

 subgenital plate acute. 



h 1 . Hind femora fasciate; apical half of male cerci moderately broad, 

 the narrowest part more than half as broad as the base; lobes of 



furcula short 69. riridipes (p. 255). 



h 2 . Hind femora not fasciate; apical half of male cerci very slender, 

 the narrowest part not more than a third as broad as the base; lobes 



of furcula long 70. decorns (p. 257). 



/ 2 . Lateral margins of siibgenital plate of male meeting with a rounded 

 curve, which if apically elevated does not form a conical tubercle 

 (17. Fasciatus series). 



g l . Cerci of male strongly incurved and conspicuously enlarged apically. 

 h l . Cerci of male very slender, in the middle not one-third as broad as 

 at base, the apical lobe feebly bifid; furcula developed as slender 

 spines about a fourth the length of the supraaual plate. 



71. attenuatus (p. 259). 



7, 2 . Cerci of male stout, in the middle more than half as broad as at 

 base, the apical lobe single; furcula developed as mere denticulations. 



72. amplectens (p. 260). 



<7 2 . Cerci of male at most gently if at all incurved, and feebly if at all 

 enlarged apically. 



h l . Metasternal lobes of male subattingent; tegmina shorter than the 

 pronotum; anal cerci of male straight as seen laterally or slightly 

 upcurved apically. 



'The cerci are barely enlarged apically in M. viridipes, which comes under this 

 division. See, also, the note under the alternate category. 

 3 The female of M. decorns is not known. 



