1963] 
Barr — Ptomaphagus 
53 
Ptomaphagus (Adelops) hirtus "1 ellkampf 
Adelops hirtus Tellkampf 1844: 313, fig. 106; type: Mammoth Cave, Ken- 
tucky. Hatch 1928: 169; 1933: 208. Jeannel 1931: 408. 
Ptomaphagus (Adelops) hirtus: Jeannel 1936: 93, figs. 154-155; 1949: 99. 
Barr 1962: 282. 
Common in Mammoth Cave, Kentucky, and known from caves in 
Hardin, Hart, Edmonson, Barren, and Warren counties, Kentucky, 
along the western Pennyroyal plateau and Dripping Springs escarp- 
ment. Troglobite. 
Ptomaphagus (Adelops) shapardi Sanderson 
Sanderson 1939: 121; type: Dresser Cave, Cherokee Co., Oklahoma (in coll. 
Illinois Nat. Hist. Surv. Div., Urbana). Jeannel 1949: 101. 
Described from Dresser Cave, 5 miles north of Fort Gibson, Okla- 
homa, and reported from northwestern Arkansas (Sanderson, pers. 
comm.). The pronotal disc is transversely strigose, although less so 
than in most members of the cavemicola group, to which it was 
assigned by Jeannel (1949). In the sexual dimorphism of the elytral 
apex and in general form it seems closer to hirtus (and to the mon- 
tane species P. mitchellensis Hatch, as suggested by Sanderson in the 
original description of P. shapardi) . Small, pigmented eyes are present, 
the individual facets distinct. Troglophile? 
Ptomaphagus (Adelops) nicholasi n. sp. 
Length 2. 3-2. 7 mm; width 1. 3-1.4 mm. Color dark brown to pale 
yellow testaceous. Form oblong, very convex, narrowing posteriorly. 
Eyes reduced to a small, pale areola. Antenna slender and elongate, 
extending to the anterior third of the elytra when laid back ; segments 
I, II, and III subequal; IV, V, and VI each half as long as III, sub- 
equal; VII subconical, its apical diameter equal to its length; VIII 
very transverse, twice as wide as long, slightly narrower than VII; 
IX and X subquadrate and subequal; XI three-fourths as wide as 
long and subequal in width to X, attenuate in apical three-eighths. 
Pronotum 2/3 as long as wide, widest just before the base, slightly 
wider than elytra; hind angles a little less than right, acuminate; base 
entire, curved slightly back to the hind angles; disc with transverse 
strigae distinct only near the margins, strigae dissociated, indistinct, 
and very superficial medially. Elytra elongate, 3/4 as wide as long, 
subparallel, gradually attenuate to the apices, twice as long as prono- 
tum ; elytral apices rounded in the male, obliquely truncate with 
external apical angle in the female; strigae oblique to the suture. 
Described on five specimens, the holotype male (American Museum of 
Natural History), allotype female (AMNH), and three paratypes 
(coll. Barr), from Fogelpole Cave, Monroe Co., Illinois, 22 October 
1961 (Bro. G. Nicholas, F.S.C., leg.). 
