The Chonaphini 167 



Ecology — The types were found under rocks on soil on a barren 

 slope in a heavily grazed, grassland area. 



Distribution — Known only from the type locality, which is on 

 the eastern side of Badger Mountain and in the western periphery of 

 the Columbia Plateau Physiographic Province. 



Genus Tubaphe Causey 

 Tubaphe Causey, 1954«:222. Chamberlin and Hoffman, 1958:52. Jeekel, 



1971:291. Hoffman, 1979:159. Kevan, 1983:2968. 



Type species — Tubaphe levii Causey, 1954, by original designation. 



Diagnosis — Paranota present only on segments 1-4, remaining 

 segments appearing nearly juloid, with at most only slight ozopore 

 swellings; epiproct with distal constriction; gonocoxae narrowly segre- 

 gated, attached by membrane only, without trace of sclerotized band; 

 telopodal elements diverging, not parallel, prefemoral process arising 

 near midlength of prefemur, acropodite arising distad; prefemoral pro- 

 cess subacicular, gently curved, with minute distal barbules; acropodite 

 narrowly blade-like to subacicular, in form of broad, open loop curving 

 through a single vertical plane; cyphopod valves with medial corners 

 projecting distinctly ventrad, subtending central cavity. 



Description — A genus of small, narrow, and subcylindrical 

 chonaphine Xystodesminae with the following characteristics. 



Body composed of head and 20 segments in both sexes. Head of 

 normal appearance, smooth. Epicranial suture sharp, distinct. Antennae 

 moderately long, with 4 conical, terminal sensory cones, no other 

 sensory structures apparent. Facial setae with epicranial, subantennal, 

 and genal series present or absent, with clypeal and labral series. 



Terga smooth, polished; strictures broad, distinct. Collum broad, 

 ends terminating above those of succeeding tergite. Paranota present 

 only on segments 1-4, strongly declined, succeeding segments with 

 only ozopore swellings. Peritremata indistinct on segments 2-4, absent 

 thereafter; ozopores opening sublaterad on swellings. Epiproct apically 

 truncate, distal portion demarcated by constriction. 



Sides of metazonites smooth, polished, with slight lobes on segments 

 2-4. Pregonopodal sterna glabrous, without modifications, strongly 

 depressed on segment 6. Postgonopodal sterna glabrous, flat, and un- 

 modified, with only shallow transverse grooves originating between 

 leg pairs. Coxae with short tubercles on legs of segments 7-14; pre- 

 femora with ventrodistal spines on legs of segments 9-18. 



Gonopodal aperture ovoid, without caudal extension. Gonopods 

 in situ with telopodites in parallel arrangement. Coxae with macrosetae 

 varying from 2-10 in two tufts, above and below cannula, attached by 



