The Chonaphini 175 



to the vial label, the Benewah County, Idaho, specimen was collected 

 from under cow dung. 



Distribution — Same as that of the genus, a small area of about 

 25.1 mi (40.2 km) east/west and 16.9 mi (27.0 km) north/south. Specimens 

 were examined as follows: 



WASHINGTON: Whitman Co., Steptoe Butte, M, 2F, juv., 3 

 June 1993, R. M. Shelley (NCSM). 



IDAHO: Benewah Co., 4.0 mi (6.4 km) SE Emida, M, 16 April 

 1987, R. S. Zack (WSU). Latah Co., 7.0 mi (11.2 km) NE Moscow, 

 M, 2 juvs., 16 May 1965, R. L. Westcott (UCD) TYPE LOCALITY; 

 and 3.0 mi (4.8 km) SE Harvard, Laird Park, M, 1 May 1971, W. A. 

 Turner (WSU). 



Remarks — No females have been collected of M. prolata, so the 

 cyphopod structure is unknown. 



This species has a much broader, less acicular and more blade- 

 like, acropodite than do the other chonaphine species with long prefemoral 

 processes. However, the aperture and sternum conform to those of the 

 species of Chonaphe, Montaphe, and Semionellus. 



Selenocheir, new genus 



Type species — Selenocheir sinuata, new species. 



Diagnosis — Paranota present and variably distinct on all segments; 

 epiproct without constriction; gonocoxae moderately separated, attached 

 by membrane only, without trace of sclerotized band; telopodal elements 

 not parallel, prefemoral process arising proximad on prefemur, acropodite 

 arising distad; prefemoral process short, less than half as long as 

 acropodite, generally sublinear, apically variable; acropodite variably 

 blade-like to subacicular, subtending broad, variable arc, curving through 

 single vertical plane; cyphopod valves without lobes, extensions, or 

 cavities; receptacle very large, partly enveloping valves. 



Description — A genus of moderately large chonaphine 

 Xystodesminae with the following characteristics. 



Body composed of head and 20 segments in both sexes, essentially 

 parallel sided, tapering at both ends. 



Head of normal appearance, smooth, polished. Epicranial suture 

 distinct, terminating in interantennal region. Antennae relatively long 

 and broad, becoming progressively more hirsute distad, with 4 conical 

 sensory cones and microsensilla on outer distal margin of penultimate 

 antennomere. Genae not margined laterally, with shallow central impres- 

 sions, ends narrowly rounded and extending just beyond adjacent cranial 

 margins. Facial setae with epicranial, genal, clypeal, and labral series 

 present, with or without interantennal, subantennal, and frontal series. 



