NO. 1124. REVISKty OF THE MELANOVLl^SClDhKli. 95 



IM)rtion behind the metjisternal lobes is not (or is hanlly) more than 

 half the ^jreatest width of the in«'ta.stethiiiin and i8 twice as broad as 

 long; inters])a<'e between mesosternal h)bes of nuiie distin<*tly trans- 

 verse,' as broad or ahnost as broaU as the lobes themselves; of the 

 fem.ile distinctly or stronjrly transverse, often fnlly twice as broad as 

 lonjx. jjfeneraliy as broad as and sometimes ]>roader than tlie lobes them- 

 selves; metasternal lobes <d" male jieuerally distinctly distant, occa- 

 sionally ai)i)roxiunite, never attinji^ent; of the female «;enerally more dis- 

 tant, the interspace in the latter sex jrenerally as broad as or broader 

 than the frontal costa. Tefjmina never fnlly develo]»cd, often wholly 

 wanting, and when present either lateral, and then jj^enerally shorter 

 than the short i)ronotnm, or else attingent or overlapping, ami then at 

 most reaching the middle of the hind femora, ami nsnally snbacnminate. 

 Hind femora moderately long and slender, the inferior genicnlar lobe 

 iis in Melanoplns and the spines of the hind tibiae generally lather fewer 

 ihan in that genns, nine to eleven, by exception eight or twelve, in 

 number in the onter series. Abdomen more or less compressed, the 

 • sides of the tirst segment with ov (in some apterons Old World forms) 

 without a distinct tympanum, the extremity in the nude more or less 

 clavate and recurved; subgenital plate of very variable form, often 

 piolonged to a distinct apical conical tubercle involving the ai)ical 

 margin, the lateral margins basally anipliate; cerci very variable, but 

 to a less degree than in Melano})lus, not infre<piently styliform, of vari- 

 iil>le length; furcula usually developed, but only at most to a small 

 (h'gree; ovipositor of female variable, typically exserted, but sometimes 

 exceptionally extended and at others i)artially withdrawn in the then 

 obtusely terminating abdomen. 



The limits between this genus and Melanoplus are diflticult to formu- 

 late; while there is no ditliculty in sei)arating the bulk of the species 

 ill either group, there are a number which tind their place almost 

 e(iually well in either. I have here attemi)ted to state anew the char- 

 acters tirst expressed by Stiil, though with such necessary moditica- 

 tions and expansions as a far larger series of forms entails. I can 

 bardly hope that the conclusions 1 have reached will be sustained at 

 every point, but I am confident that they must hold in the main. In 

 doubtful cases I have endeavored to determine the atlinities from the 

 Concurrent study of both sexes and not from either alone, which would 

 have brought about other and sometimes discordant results; and I 

 have assigned the greatest weight to the intervals between the sternal 

 lohes. 



As I have here employed a ditferent generic term from that in cur- 

 rent use in literature, I submit the following cogent reasons for the 

 necessity of the change: 



The generic name Fodisma was proposed in a Gallic form {Podisme) 



A sin^]e exception is known to me in the subapterous Japanese Pndisma dairisama. 



^vll(•^e it is slightly longitudinal. 



