IS-l NORTH AMHRK’AN ( )KI) 1 1’( )J) INAK ( OKTIIOPTERA ; ACRIDIDAE) 
r()u;iily |)r()niiiK'ii(, l);isal outline- more (-llipl ieail. Proiioluiii with strangula- 
tion of prozona more decided in pi'oportion to metazonal disk width; ineta- 
zonal port ion of pronot al disk as a. whole mon; deielanate-, with lateral (hu- 
meral) shoulders moi'e evideid and less broadly rounded, d'esmina moder-' 
ately hioad, as a whole more- suhequal in width, a.i)ieal section less narrowed. 
A\'infis ample. 
Alloliipc . — cf ; SaiiK- data, as type'. [Aca.(l. Nat. Sci. l*liila,.| 
The female se.\ shows (he same feature-s of differe-idiation as ( lae male, hut 
( In- fast i{;ial differemu' is h-.ss decide* 1 and t he pronot.al coidrasts not a.s marked. 
Coloration showin}>; no ilist inct ivc- features of differeidia.tion from (lu! other 
suhspc'cies, al(houfi;h ava-ra^ins mon- iid'umat.e or even hla.ckish. \Ving' l»a.r 
ne\'er solidly mai’kt-d nor as si lonfily evident as in (’. rahtthi tii(ir(if(isr.i(ihi.s, 
hnt always of tin- clouded typ*-, inlensilied (.ow.-ird flu* marf;ins and weak 
mesad, found in niliiiln r<il)id<i, distal portion of winfi; (ypic;dly W'eakly infu- 
male. ('.-ludal lihia*- wilh a pah-, comphde or in(;om])l('( (>, i)roximal annulus, 
elsi-w In-re his(.(-r (,o mumtny brown, rather pah; in post median section; (ibial 
spiin-s ochrac(-ous-(aw ny to pah- bis|.(>r proximail. 
hlnvironnu-n( :d iidhn-ma-s on b;ise coloi’al ion arc* (-videid . Specinn-ns from 
Mvanslon, Wyomiiifj;, ;ire v(-ry pah- with o(-casionally subobsoh-((- winji b:u's. 
(d(-nw()od Spriiifiis m;d(-ii;il is .-is a wdioh- brownish and of a uniform tone. 
CloiidcroK ma((-rial and (hat. from 'r(-sn(|ue Ci'i-ek, in (In- Santa h'e Koi-kies, 
is mon- unilorm bhn-kish, allhoufi;h sona-of I he( 'louderoft si-ries an- vi-i'v pah-, 
as pah- as avc-raji;*- (’. rahu.Ut rdhuld, Irom its tyiie hn^ality (Mainmolh Hot 
Sprin};s, 't i-llowsloin- National Park). Imnn-diate (-nvironmeni is probably 
tin- controlling lac-tor, as is (|ui((- ch-arly (he- ease- in cc-rtain spc-cic-s of Tri- 
du rdlrapis. 
M('d.'iur( dd dls (id diilludcivr.s) 
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of 
of 
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('louderoft, .\(-w Mc-xico, dllo- 

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