174 Rowland M. Shelley 



Length 20.4 mm, maximum width 3.6 mm, W/L ratio 17.6%, 

 D/W ratio 75.0%. 



Width across genal apices 2.1 mm, interantennal isthmus 0.7 mm. 

 6th antennomere with minute distal microsensilla. Facial setae as follows: 

 epicranial 2-2, interantennal 1-1, frontal 2-2; genal with four groups, a 

 central group of 4-4, one lateral to this of 1-1, one beneath antennae of 

 1-1, and one submarginal of 4-4; clypeal about 24-24; labral about IS- 

 IS. 



Dorsum smooth, polished. Paranota well developed throughout 

 body, broadest on anterior segments, strongly declined, angling sharply 

 ventrad and creating appearance of strongly convex body, anterior 

 corners rounded on all segments, caudolateral corners blunt on segments 

 1-4, produced slightly caudad beginning on 7 and continuing thusly 

 to caudal end of body. Peritremata moderately distinct, moderately 

 elevated above paranotal surface; ozopores located caudal to midlength, 

 opening sublaterad. 



Sides of metazonites smooth, polished. Gonapophyses short and 

 broad, only slightly extending from 2nd coxae. 5th sternum with 2 

 short projections subtending 4th coxae, moderately depressed between 

 5th legs; 6th sternum strongly depressed between both leg pairs to 

 accommodate stems of telopodites. Coxae of legs 3-7 swollen ventrad, 

 remaining coxae unmodified, prefemora without projections. " - 



Gonopodal aperture ovoid, extending strongly caudad between 

 9th legs with shelf in extension, l.S-mm wide and O.S-mm long at 

 midpoint, without indentations, anterior margin flush with metazonal 

 surface, sides elevating strongly caudad to caudolateral corner, dropping 

 slightly on caudal extension but still well elevated above metazonal 

 surface. Gonopods in situ (Fig. 50) with telopodites extending anteriad 

 in parallel arrangement over 6th sternum, prefemoral processes curv- 

 ing toward each other and nearly meeting in midline. Gonopod struc- 

 ture as follows (Figs. 51-53a): Coxa moderate size, with sublinear 

 field of S-10 macrosetae, connected to opposite member by moderately 

 sclerotized sternum, latter with medial lobe. Prefemoral process long, 

 narrowly blade-like, arising anteriolaterad on prefemur, curving broadly 

 mediad basally then anteriad in generally bisinuate appearance, apically 

 acuminate. Acropodite blade-like, curving broadly anteriad then dorsad 

 distally, sides narrowing gradually to acuminate tip, forming narrow 

 loop. 



Ecology — The Whitman County, Washington, specimens were 

 found under thin layers of moist leaves on relatively hard substrate in 

 a deciduous thicket beside the picnic area at Steptoe Butte. According 



