1 26 Thomas C. Barr, Jr. 



with 2-3 rows of rather long pubescence each, inner 5 striae deeper but 

 outer striae still usually all discernible, striae impunctate, rarely evanes- 

 cently punctulate; apical recurrent groove vestigial but usually faintly 

 traceable to 5th stria, rarely to 3rd; discal chaetotaxy normal (+++). 

 Aedeagus 0.82-1.03, mean 0.90 ± .06 mm long (N = 56); basal bulb 

 large, forming less than right angle with main axis of median lobe, 

 which is moderately arcuate, gradually and briefly attenuate, slightly 

 reflexed at apex; copulatory pieces subequal in length, typical for mene- 

 triesi group; parameres with 4 apical setae. 



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

 tory) and 39 paratypes, Jones Cave, 4.3 km NNE Columbia on E side 

 valley of Butler Branch, Adair Co., Kentucky (Cane Valley 7%' Quad- 

 rangle), 27 July 1963, T. C. Barr. Measurements of holotype (mm): total 

 length 5.60, head 1.07 long X 0.89 wide, pronotum 1.04 long X 1.19 

 wide, elytra 3.24 long X 2.02 wide, antenna 3.79 long. 



Distribution. — Described on 306 specimens from 20 caves in north- 

 eastern Metcalfe, northern Adair, and southern Green counties, Ken- 

 tucky. Distribution and variation in P. darlingtoni is discussed in detail 

 elsewhere (Barr, in press). Hybridization with the following subspecies 

 takes place in populations near the mouth of Little Barren River. 



Pseudanophthalmus darlingtoni persimilis, new subspecies 



Fig. 9 



Etymology. — Latin persimilis, "resembling." 



Description. — Length 4.8-6.4, mean 5.5 ± 0.3 mm (N = 40). Head, 

 pronotum, and elytra more slender than in nominate darlingtoni; pro- 

 notum widest in apical third, usually with more pronounced antebasal 

 sinuation, hind angles correspondingly less prominent, prehumeral 

 borders a little more oblique to mid-line, circumscutellar depression 

 shallower, posthumeral marginal sinuation very feeble. Aedeagus sim- 

 ilar to that of P. d. darlingtoni; mean length smaller, 0.77-1.00, mean 

 0.87 ± .06 mm (N = 16). 



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

 tory) and 25 paratypes, Woodard Cave, 5.0 km N W Donansburg near 

 Little Barren River, Green Co., Kentucky (Hudgins 7%' Quadrangle), 22 

 September 1963, T. C. Barr, J. R. Holsinger, R. M. Norton. Measure- 

 ments of holotype (mm): total length 5.72, head 1.04 long X 0.95 wide, 

 pronotum 1.07 long X 1.19 wide, elytra 3.34 long X 2.11 wide, antenna 

 3.87 long. 



Distribution. — Described on 90 specimens from 11 caves in Green 

 County, north of Green River (a dispersal barrier upstream from the 

 mouth of Little Barren River, where it flows in a bed of lower, cherty 

 Fort Payne formation), and in eastern Hart County, Kentucky. 



