NO. 1124. REVISIOX OF THE MKLASOri.I—SCVDDEK. 69 



nates in a tubercle distinet tVom tlie marj^iii itself, tlum^li it is a rather 

 ('(Hiiiiion t'eature in the alternate section; accord in«j:ly I have arran<;e<l 

 these two jjenera in such an order that they dir<*('tly follow those of the 

 otiier section, and the remaining,' jjjenera in such sequence as that 

 anan^enient recjuired. It is coinjuised of inserts of j» much heavier 

 build than Ihspcrotctiij', tl e principal distiiu'tions between the two 

 genera being given in the tabic (page 11). 



The genus is confined to the western half of the Tnited States from 

 the Yellowstone to the Mexican border,' but it does not appear to have 

 hcen f<uind in California" or farther east than western Kansas and 

 Nebraska; it does not reach the prairie region, and is mostly found 

 a]»parently at elevations not far from .'i,00(> to (l.(K)(> feet above the sea. 



According to Brunei', Aatloplus tiirnhuUii and Atoloplus rltcm>i)<nlii, 

 and theref(U'e ju'obably all the members of the genus, or at least those 

 of the division A' of the following table, are similar in their food 

 habits, confining their attention ''almost entirely to the vaiious s])ecies 

 of plants of the botanical family Chenopodiaceae. which aboujid in the 

 regions where they occur, being particularly fond of the grease-woo»l, 

 >SV( rcoba tes verm icu hi r is.^^ 



ANALYTICAL KEY TO THE SPECIES OK AEOLOPLUS. 



A', rronotuin longitiidiiially striped with hghtcr and darker colors; tegniiua more 

 or le>s (oxcei>tiug in Atolophis ehijnnfi), thougli (sonu-tiuies feebly, decked with con- 

 trasting colors; lower genicular lobe of hin<l femora crossed by a dark basal band. 

 //'. Tej^mina at rest extending as far as or beyond the tip of the abdomen, particu- 

 larly in the male. 

 c'. Tegmina relatively long find slender, in the middle narrower than the )»ro- 

 Z(tua; wings elongate, fully twice as long as bn»ad. 

 d'. Snniller species, the males less than 15 mm. long; tegmina maculate; apical 



half of male cerci very slender 1 . trniiipenttin (p. 70). 



(V. Larger species, themales scarcely less than 20 nmi. long; tegmina immacu- 

 late; apical half of male cerci relatively stout 2. eht/tois (p. 71). 



c'. 'Jegmina relatively short and stout, in the nii<ldle as broad as the prozona; 

 wings not elongate, distinctly less than twice as long as broad. 

 dK Tegmina an<l wings not or scarcely surjiassing the abdomen iu either sex; 

 subapical tubercle of male abdomen prominent, about as high as broad. 



3. ;e^/rt//.v (p. 71). 

 d-. Tegmina and wings much surpassing the abdoii.'en in both sexes; subai)ical 

 tubercle of male abdomen but slightly elevate<l, less than half as high as 



broad 4. raJifornicKS ( p. 73). 



h-. Tegmina at rest falling distinctly, sometimes considerably, short of the tip of 

 the abdomen. 



C Tegmina lobiform, not so long as pronotum 5. clunopodii (p. 74). 



C-. Tegmina merely abbreviate, about twice as long as pronotum. 

 d'. Cerci of male tapering only in the basal half, the apical half slender and 



e(|ual 0. tunihiiUii (p. 75). 



d-. Cerci of male tapering almost uniformly through the basal three-fourths, 

 only the apical fourth equal 7. plmjosus (p. 7t5j. 



And beyond it, for I have females of an undescribed species from San Louis I'otosi. 

 -Though Bruner states that a species occurs on the *' Pacitic Coast. " 



