262 PROCEEDINGS OF THE NATIONAL MUSEUM. 



quadrate or subquadrate, slightly longer than the closely punctate meta- 

 zona, the sulcus between them very broadly obtusangulate by wide einar- 

 giuation of the prozona. Prosternal spine long, subcylindrical, blunt, 

 erect; interspace between inesosternal lobes twice as long as broad 

 (male) or a little transverse, narrower than the lobes (female), the 

 inetasternal lobes subattingeut (male) or tolerably distant (female). 

 Tegrnina slightly overlapping (male) or attingent (female), ovate, rather 

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

 rufescent or fusco-luteous, the fore pair and to some extent the middle 

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

 infuscated in premedian and postinedian bands, which are angulate on 

 the outer face and generally more or less confused; their lower face, 

 especially exteriorly, more or less ferruginous, the geniculation mostly 

 fuscous; hind tibiae generally dull red, more or less feebly flecked or 

 obscured basally with fuscous, sometimes pluuibeo-glaucous, the spines 

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

 in number in the outer series. Extremity of male abdomen strongly 

 clavate, much recurved, the supraanal plate abruptly and obliquely con- 

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

 clypeate, the lateral margins raised only in the apical half and here form- 

 ing 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 consisting of a pair of minute, sometimes scarcely 

 perceptible, distant denticulatioris on the outer side of the snbmedian 

 ridges of the supraanal plate; cerci large and stout, elongated, com- 

 pressed laminae, mesially narrowed so that the apical portion is snb- 

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

 rounded but distinctly produced inferiorly, reaching the tip of the 

 supraanal plate; subgenital plate moderately broad, a little longer 

 than broad, the lateral and apical margins slightly flaring, the latter 

 elevated, well rounded and entire. 



Length of body, male, 20 mm., female, 25.5 mm.; antennae, male, 8.5 

 mm., female, 10 mm.; tegmina, male, 5 mm., female, 5.75 mm.; hind 

 femora, male, 12 mm., female, 13.75 mm. 



Ten males, 14 females. Portland, Multnoinah County, Oregon, Pack- 

 ard (U.S.X.M. Kiley collection; S. H. Scudder); Oregon City, Clack - 

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

 County, Washington, Wickham (L. Bruiier); Loon Lake, Colville Val- 

 ley, Washington, July 23, S. Henshaw (Museum Comparative Zoology). 



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

 mountains of Montana, Idaho, and Wyoming," and it " appears to 

 abound only where two or three particular plants are met with, one of 

 which is a species of geranium. 7 ' 



The female of this species closely resembles the same sex of M. boreMi, 

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

 and the tegmiua are shorter and more strongly rounded at tip. 



