Revision of Desmometopa Loew (Litometopa Sabrosky) (Diptera: Milichiidae), with descriptions of six new species

The Afrotropical genus Litometopa Sabrosky is relegated to subgeneric status within Desmometopa Loew and revised. Desmometopa (L.) glabrifrons (Sabrosky), the type species, is redescribed, and six new species, D. (L.) brachycephala, D. (L.) dolichocephala, D. (L.) flavicornis, D. (L.) glandulifera, D. (L.) nigrifemorata, and D. (L.) sabroskyi, are described. The subgenus is redescribed, including a description of sclerotized structures within the male abdomen possibly representing a gland, and a specialization of the female ovipositor, known as the secondary ovipositor. A key to all species is given. The relationship between Litometopa and other taxa within Desmometopa and among species of Litometopa is discussed.