. Bonn zoological bulletin. Zoology. Revision of Himalayan Lathrobiiim 145 184-185, 191-192), unmodified pubescence of the male stemites VII and VIII (Figs 182-183, 189-190), and a symmetric posterior excision of the male stemite VIII. The two species of the L. aculeatum group, L. aculea- tiim Coiffait, 1982 and L. spiculatum sp. n., are distrib- uted in central Nepal (Fig. 96). They are similar to the species of the L. jumleme group, but distinguished by a long (> mm) and slender aedeagus with a conspicuous- ly long and thin, needle-shaped ventral process (Figs 196-197, 203-212), and a
. Bonn zoological bulletin. Zoology. Revision of Himalayan Lathrobiiim 145 184-185, 191-192), unmodified pubescence of the male stemites VII and VIII (Figs 182-183, 189-190), and a symmetric posterior excision of the male stemite VIII. The two species of the L. aculeatum group, L. aculea- tiim Coiffait, 1982 and L. spiculatum sp. n., are distrib- uted in central Nepal (Fig. 96). They are similar to the species of the L. jumleme group, but distinguished by a long (> mm) and slender aedeagus with a conspicuous- ly long and thin, needle-shaped ventral process (Figs 196-197, 203-212), and a somewhat asymmetric poste- rior excision of the male stemite VIII (Figs 195, 202). The speciose L. pectinatum group includes eleven species from central and eastern Nepal (Fig. 214): L. at- tritiim sp. n., L. barbatiim sp. n., L. barbulatum sp. n., L. calcaratiim, L. cassagnaui Coiffait, 1982, L. cavicrus sp. n., L. compressicnis sp. n., sp. n., Coif- fait, 1975, L. pectinatum Coiffait, 1981, L. privum sp. n. They are readily distinguished from all other Himalayan species groups by the presence of one or more transverse rows of pectinate setae on the male stemite VII (, Figs 215, 219), undoubtedly a synapomorphy constituting the monophyly of this species group. The males of some species, in some cases even the females, have conspicu- ously modified metafemora, mesotibiae, and/or metatib- iae (Figs 225, 230, 237, 244, 251). Diversity and biogeography. In all, 48 described species of Lathrobium are now known from the Himalaya. The westernmost representative is from Kashmir, the eastern- most species from Darjeeling district in West Bengal, northern India. The region with the highest diversity of described species is central Nepal (25 species), followed by eastern Nepal (14 species) and westem Nepal (seven species). Only three species are known from northem In- dia, one from Kashmir and two from Darjeeling district in West Bengal. These figures, however, are
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