The Chonaphini 147 



Paratype gonopods — Agreeing with those of holotype in all details. 



Female paratype — Length about 24.7 mm, maximum width 3.4 

 mm, W/L ratio 13.8%, D/W ratio 82.4%. Agreeing closely with male 

 in somatic features, except paranota shorter and more strongly declined, 

 creating appearance of more vaulted body. Valves (Fig. 26) moderate- 

 size, hirsute along ventral margins with moderate-size lobes at midlength 

 of ventral surfaces, without depressions. Receptacle small flat, and 

 inconspicuous, located directly beneath valves, not cupped around 

 sides of latter, with a few hairs from ventral margin. 



Distribution — Known only from the type locality. 



Remarks — Neither of the complete specimens is in good condition, 

 having softened after years in preservative. There is also an additional, 

 loose reproductive segment of a male with both gonopods intact. I 

 have labeled these as "male paratype gonopods." 



The smallest species, C. schizoterminalis is somewhat broader 

 in proportion to its length than C. evexa. It is unique in the complete 

 absence of prefemoral spines on the walking legs, and like C. evexa, 

 the gonopodal telopodites are rotated counterclockwise on the coxa, 

 in contrast to the condition in C. armata and remissa. However, C. 

 schizoterminalis shares the caudal expansion on the aperture with the 

 last two species. Northeastern Washington has been very poorly sampled, 

 as most collectors have focused on the wet coastal forests west of the 

 crest of the Cascades. Additional unexpected millipeds may therefore 

 await discovery in the Okanogan, Colville, and Kaniksu National Forests 

 in Okanogan, Ferry, Stevens, and Pend Oreille counties, and C. schizoterminalis 

 could conceivably occur across the International Border near Rossland 

 and Trail, British Columbia, only 71.5 mi (113.8 km) to the north. I 

 visited the Springdale area in May 1993 to try to obtain more material, 

 but encountered C. armata, not C. schizoterminalis, approximately 

 13.5 mi (21.6 km) west of the village along the Springdale to Hunters 

 road. 



Genus Semionellus Chamberlin 

 Semionellus Chamberlin, 1920:97. Attems, 1938:200. Chamberlin and 



Hoffman, 1958:47. Jeekel, 1971:287. Hoffman, 1979:157. Kevan, 



1983:2968. 



Type species — Polydesmus (Leptodesmus) placidus Wood, 1864, 

 by original designation. 



Diagnosis — Paranota present on all segments but becoming 

 progressively less distinct caudad, caudal part of body appearing sub- 

 cylindrical; epiproct without constriction; gonocoxae widely segregated 

 by narrow sternal band, latter with lateral lobes; telopodal elements 



