抄録
The nigriventris-comples, of the genus Leucophenga MIK is established for those species having palpi of a remarkable sexual dimorphism. One of the components of the male genitalia is found to be characteristic to this complex. On the contrary, the abdominal colour patterns are found considerably variable and in general hardly applicable for identiying the species. A preliminary classification of the species thought to belong to this complex is attempted and a tentative key to these species is given.
