f|na(lmtc (u* Hnhqiuulrntp, slijihtly lon<;«'r tliiiii tlio closrly pmu'tuto iiirta- 

 zoim, till* siilnis l)i't NVtH'ii rlHMii very hrosully ()htnsaii;;iil;it «' by \\u\e «*miir- 

 jfiiiatioii at' tlu* pro/(»iia. Prostcnial spine Uma. siiheyliinlrical, l»Imit, 

 erect; iiiterspaee l)et\v»*eii mesosteiiial lol)e.s twice as Ion;? as bro.Hl 

 (male) <»r u little transverse, narrower than tiie lobes (female), the 

 inetasternal lobes siibartin;:ent male) or tolerably distant i female). 

 Te;;miiiii slij^litly overlappinjLC male) or attin)i;ent ( female), ovate, rather 

 broad, shorter than the jjionotum, uniform brownish fuscous. Femora 

 rutesi'cnt or fusco luteous. the fore i>air and to some extent the middle 

 pair tumescent in the male, the hind pair more or less but obscurely 

 infuseatcd in premedian and postmedian bands, whicii are annulate on 

 the outer fact* and jjjeiu-rally more or less confused: their lower face, 

 es[»ecia!ly exteriorly, more or less ferru;:inous, the geniculation mostly 

 fuscous; hind tibiae ;;enerally dull red, more or less feebly tlecked or 

 obscured basally with fuscous, som(*times plumb(*o j^laucous, the sjnnes 

 rather short and black throujiliout, eleven to twelve, usually eleven, 

 in nund)er in the outer series. Kxtremity of male abdomen stron<ily 

 elavate, much recurved, the supraanal plate abruptly and obliciucly con- 

 tracted laterally in the apical half so as to make the shape somewhat 

 clypeate, the lateral mar«;ins raised only in the apical half and here form 

 in <; between them a dorsal channel which nearly continues, but is a little 

 wider than, the basal median sulcus, which is rather deeply impressed 

 but between walls which rise but little above the otherwise nearly 

 plane surface; furcula consistin;; of a i)airof minute, som«'times scarcely 

 percei»tible. distant denticulations on the outer side of the submedian 

 ridges of the supraainil plate; cerci large and stout, elongate<l, com- 

 I)ressed laminae, mesially narrowed so that the apical portion is sub 

 spatnlate though not so broad as the base, gently incurved, the tip 

 rounded but distinctly produced interiorly, reaching the tip of the 

 supnianal plate; snbgcnital plate ujoderately broad, a little longer 

 than broad, the lateral and a[»iial margins slightly tlaring, the latter 

 elevated, avcII rounded and entire. 



Length of body, male, 20 mm., female, 2."».."» mm.: antennae, male. .S.."> 

 mm., female, 10 mm.: tegmina, male, o mm., female. '>."> mm.: hind 

 femora, nnde, 12 mm., female, l.i.7.") mm. 



Ten luales, 14 fenuiles. Portland, Multnomah County. Oregon, Pack 

 ard (U.S.N. M. — Kiley collection; S. II. 8cudder): Oregon City, Clack 

 anms County, Oregon, July, W. G. W. Harford; Soda Springs, Yakima 

 County, Washington, Wickhain (L. Bruner): Loon Lake. Colville Val- 

 ley, Washington, July 2.5, S. I lenshaw (Museum Comparative Zoology). 



It is stated by Bruner that this species is ^*to be met with in the 

 nnmntains of Montana, Idaho, and Wyoming," and it '••api)ears to 

 abound only where two or three i)articular plants are met with, one of 

 which is a sjjecies of geranium." 



The female of this si)ecies closely resembles the same sex of M. horckH. 

 but has relatively longer antennae, about as long as those of the male, 

 and the tegmina are shorter and more strongly r»)unded at tip. 



