24 
Thomas C. Barr, Jr. 
to the Virginia border and about 150 km southwest of Neely Farm 
Cave. In comparison with greeveri, however, the concavity in antennal 
segment IX is much more extensive, the oblique vertexal ridges are not 
carinate, the pronotal spines are not continued forward, and the prox- 
imal margin of the protibial groove is not cuspate. The aedeagi of the 
two species are clearly similar in form, but in B. parki the arc formed by 
the two processes of the ventral plate is more circular than oblong-oval, 
and the movable process is straighter and sharply bent to the left at its 
apex. Whether parki is primarily a cavernicole, or whether it will even- 
tually be found in epigean habitats like monstrosus, remains to be 
determined. 
ACKNOWLEDGMENTS . — I thank J. R. Holsinger for the speci- 
mens on which this paper is based and John Wagner for reviewing the 
manuscript. This study was supported in part by NSF 82-02339. 
LITERATURE CITED 
Park, Orlando. 1951. Cavernicolous pselaphid beetles of Alabama and Ten- 
nessee, with observations on the taxonomy of the family. Geol. Surv. Ala. 
Mus. Pap. 31:1-107. 
. 1960. Cavernicolous pselaphid beetles of the United States. Am. 
Midi. Nat. 64:66-184. 
. 1965. Revision of the genus Batriasymmodes (Coleoptera: Psela- 
phidae). Trans. Am. Microsc. Soc. 84:184-204. 
Accepted 17 June 1985 
