124 Thomas C. Barr, Jr. 



Diagnosis. — Similar to P. menetriesi in having hind angles of the 

 pronotum tipped forward instead of produced backward (as in striatus 

 and darlingtoni), differing in impunctate or vaguely punctulate elytral 

 striae, strongly pruinose elytral disc, and more oblique prehumeral 

 borders; elytral chaetotaxy +0+, the posterior discal puncture absent. 



Description. — Length 4.6-5.8, mean 5.2 ± 0.3 mm (N = 77). Robust, 

 subconvex, pubescent, elytral apical groove vestigial (diagnostic for 

 menetriesi group). Head and mandibles less slender than in menetriesi, 

 dorsum subglabrous; labrum with low median lobe. Pronotum 0.83-0.86 

 as long as wide, widest in apical third, sides rounded apical half then 

 convergent to small, approximately right, sharp, and reflexed hind 

 angles; anterior angles prominent, base 0.75 maximum width, apex 0.87 

 as wide as base; small secondary angles of base internal to very deep, 

 oblique, basolateral impressions; median antebasal impression quite 

 deep and linear; disc convex, with long, rather sparse pubescence; ante- 

 rior marginal setae placed before greatest width, posterior marginals 

 before hind angles. Elytra elongate-oval, 0.55-0.64 longer than wide; 

 humeri prominent, setose with moderately coarse serrations, prehumeral 

 borders oblique to mid-line; disc densely pubescent and strongly prui- 

 nose overall; striae rather shallow but well-defined and regular, impunc- 

 tate, intervals weakly subconvex; posterior discal setae constantly absent 

 (+0+). Aedeagus 0.97-1.13, mean 1.05 ± .05 mm long, much larger than 

 that of menetriesi (or the species described above in this paper); basal 

 bulb larger and deflexed, median lobe moderately arcuate, briefly pro- 

 duced, apex spout-shaped and not reflexed; transfer apparatus typical 

 for menetriesi group. 



Type series. — Holotype male (American Museum of Natural His- 

 tory) and 76 paratypes, Rhoton Cave, 3.3 km SW Hestand on N side 

 valley of Sweetwater Creek, Monroe Co., Kentucky (Tompkinsville 7%' 

 Quadrangle), 7 August 1963, T. C. Barr, R. A. Kuehne. Measurements 

 of holotype (mm): total length 5.28, head 1.02 long X 0.93 wide, prono- 

 tum 1.02 long X 1.24 wide, elytra 3. 19 long X 2.05 wide, antenna 3.97. 



Distribution. — Described on 279 specimens from 17 caves. The range 

 of this taxon is roughly Y-shaped, centered in Monroe County, Ken- 

 tucky, but extending northwest into southeastern Barren and south- 

 western Metcalfe counties, northeast to southern Adair and northwestern 

 Cumberland counties, and south to Clay and northern Jackson coun- 

 ties, Tennessee, where it inhabits caves in Ordovician limestone at Cen- 

 tral Basin level. 



Pseudanophthalmus cerberus completes, new subspecies 



Fig. 7 



Etymology. — Latin completes, "complete." 



Description.— Similar in size (4.6-5.4 mm) and habitus to cerberus 



