„,, 1,24. RKvisroy nr Tiir MEi.iynrir-srrnDEK. % 



iin\ but iiiHiirtlriently. I^odinmn follows, with alxmt twenty lour 

 siMM'it'H, of whii'h only »Mjrht are fouiul in Amerirji, then AeolojtlnH witli 

 ten, lIcMprrotctti.r with eijjht.aml llrmlynottH with seven. The remain iii;^ 

 genera have at the niOHt only tliree or four species each, and fourteeu 

 of them are nionotypie. 



The ;;enera with widest latitudinal ran;;e (over twenty decrees) are, 

 primarily, Mehniopliix, and then lltHptrntetti.v (eipht speeies), Phiw- 

 tttliotcH (one speeies), (h'tlahotioins (one speeies), ('tnnpiflnnuitlia (four 

 speeies). and piohably l*<nlisma (ei;;ht speeies). Acoloplns (t«'n speeies) 

 follows hard after. The jjenera characteristics of the I'nited States, 

 with narrowest known limits, are (hfrnnitsrirtftcs and Eotvttii\ both 

 known only from Florida. These last tw(», with rarojifa an<l .[pt*no- 

 jx'ilex, are the only ;fenera (with eifjjht speeies between them) eontined 

 to the eastern I'nited States, if Texas may be included in that term, 

 for they do not extend west of that. Most of the ji:enera are western, 

 usin;r that term in a broa<l sense, thoujfh Ih/pfuhhtni, i'nmpfiUicnutha^ 

 Jh'ndrotrtti.i: l*(irati/iittropi(li(i,n\u\ PhoctalUtteH — all but Campiffaraittha 

 uionotypic jjenera — are j)eculiar to the Mi8sissip])i Valley, thoujjh ju-iii- 

 cii)ally to its western half. The oidy p^enera found across or almost 

 a<*ross the continent, or at all events on opposite sides of the continent, 

 ar<' Mrlauoplus, Ilcsperotcftij', and Podismo. Acolophta (ten species), 

 Jinnh/notcH (seven species), PoccUoUttir (three species), OednleonotuH 

 (one species), and Ancnfophts (one species) are characteristic of the 

 extreme West. Finally, Ihipovhlorn (one species), Bradipiotes (seven 

 fi}»ecies), Podisma (ei<;ht si)ecies), and Asemoplnx (one species) are con- 

 fined or nearly (routined t(» the rejjion north of latitude 3.~>^. Podlnma 

 h;»s also the same limitations in the Old World. Uejj:ardin<( the distri- 

 bution (d' Mel(nin2)his, with its great prej)onderance of forms, further 

 details will be jiiven under that genus. 



There are but few species which range across the continent, yet not 

 a few have a very wide distribution. The examples of the former are 

 wholly contiiied *o Melanoplus: M. Gthuiis, fa-sciatus, fcnnir-ntbrum, 

 eatremHs^viinor.nud/emoratas, }f. ertrcmus only in the high north. As 

 illustrations of the latter may be mentioned Hespcrotctti.v pratensis^ 

 Fhoetaliotes nehrascensis, Paroxyn iioridann, OedaleonotuH enic/ma, and 

 the following species of Mehtnoplus : fiabcUi/er, spreiun, Hciidderi^dmr- 

 son',, cinereus, Packard a, luridus, difrrentialis, biviftatnx, and pnnctnla- 

 tu8. Most of these range more widely from north to south than from 

 east to west. About three fourths of all the species are known from 

 west of the Mississippi River only. 



Dimorphism in lenfjth of tegmina. — We find in the Melanopli every 

 variation possible in the length of the tegmina, but the species are in 

 general tolerably well tixed in this respect. The same is the case with 

 most of the gener; . the species of which are in each case generally 

 apterous, provided with lateral pads, abbreviated tegmina, or fully 



