Eight species of Notomicrus Sharp are recognized and described or partially redescribed with figures of dorsal outlines and external male genitalia: brevicomis Sharp, gracilipes Sharp, huttoni sp.n., malkini sp.n., nanulus (LeConte), reticulatus Zimmermann, sharpi Balfour‐Browne, traili Sharp. A key for identification is given, but the main reliance for recognition of the species is on the external male genitalia. New distribution records are given for all species.

No abstract

No abstract

The 1st blind, depigmented, aquifer-adapted water beetle of the family Dytiscidae is described from North America. Haidcopoms texanus Young and Longley (n. genus, n. sp.) is superficially similar to Morimotoa phrcatica Ueno from Japan, but differs in possessing minute, apparently nonfunctional eyes, and in sensory setal vestiture and structure of the tarsi and external male genitalia. The remarkable similarity of the fore and middle coxae and the relationship of the prosternal process to the metasternum among Haideoporus, Morimotoa, and Siettitia (a cave-adapted genus from southern France) is thought to be due to convergence as an adaptation to subterranean life parallel to the condition seen in many cave carabids (Coleoptera: Carabidae). The world fauna of subterranean aquatic beetles and the associates of Haideoporus are discussed.