54 
Psyche 
[March 
This is the first troglobitic beetle to be described from the caves 
of southern Illinois. It seems most closely related, at least morpho- 
logically, to hirtus, from which it is readily distinguished by the trans- 
verse strigation at the margins of the pronotal disc and by the more 
transverse eighth antennal segment. The species is a morphological 
and geographic intermediate between hirtus and shapardi with respect 
to the pronotal strigation. The eyes, however, are very small and 
show no facets or pigmentation. 
cavernicola group 
Elytral apex either rounded or truncate in the male, acuminate 
in the female; transverse strigation of pronotal disc pronounced 
(except in valentinei Jeannel and whiteselli n. sp.). 
Ptomaphagus (Adelops) cavernicola Schwarz 
Schwarz 1898: 57; type: Marble (=: Marvel) Cave, Stone Co., Missouri 
(U. S. Nat. Mus. #1424). Jeannel 1936: 92; 1949: 101. 
The type of the species group has large, pigmented eyes and func- 
tional wings. It is apparently widely distributed in the Ozark region. 
My own material includes specimens from the following localities: 
ARKANSAS. Washington Co.: Granny Dean Cave, near Black 
Oak. MISSOURI. Benton Co.: Flippen Cave, Lish Estes Cave, 
Luegenbeil Cave, Spring Cave. Boone Co.: Devils Icebox. Camden 
Co.: Carroll Cave. Dallas Co.: Cat Hollow Cave. Franklin Co.: 
Fisher Cave. Laclede Co. Mary Lawson Cave. Stone Co.: Marvel 
Cave (type loc.), Dillo Cave, Fairy Cave, Gentry Cave. IOWA. 
Jackson Co.: Hunter Cave, near Andrew. 
In the caves, P. cavernicola is most abundant upon feces of bats 
or raccoons, or upon dead bat carcasses. Occasionally it occurs on 
wet, rotten wood. In Dillo Cave, Stone Co., Missouri, many larvae 
were collected from raccoon feces on 27 January 1958, and the species 
possibly reproduces throughout the year. P. cavernicola appears to 
be more tolerant of moisture and temperature fluctuations than its 
eastern troglobite relatives. In Marvel Cave large numbers were 
secured from dead bats (Myotis grisescens Howell) in the Waterfall 
Room, January 1958. A cold, dry current of air, blowing from a 
passage leading to a newly opened artificial entrance, was flowing 
over the bat carcasses. Although the species is known only from 
caves, this tolerance, in conjunction with the well developed eyes 
and wings, the retention of some pigment, and the comparatively 
extensive geographic distribution indicate that it is a troglophile. 
Ptomaphagus (Adelops) hatchi Jeannel 
Jeannel 1933: 252; type: Wonder Cave, Grundy Co., Tennessee (in Mus. 
Nat. Hist. Nat., Paris). Jeannel 1936: 93; 1949: 101. 
