Marganana (Declivana) DeLong & Freytag, 1963

Type species: Marganana (Declivana) equata DeLong & Freytag, 1963: 262 .

Diagnosis: (1) Pronotum and crown strongly sloping anterad; (2) pronotum, in dorsal view, more than 3× as long as crown length; (3) pygofer with apical process;(4) *subgenital plate with inner margin not excavated; (5) style whit blade long; (6) aedeagal shaft long and slender; (7) *aedeagus with pair of processes arising at apex or slightly sub apically.

Remarks: This revised diagnosis is based on the original description of DeLong & Freytag (1963) and excludes the following features: (1) "anterior margin of crown thick″, which is observed in all species of the genus; (2)"pygofer short and robust″ which is slightly longer in M. tetramaculata sp. nov. compared to M. equata but does not differ in length from the other congeners;(3)"pygofer with apical process spine-like″ which in M. tetramaculata sp. nov. is rounded apically and serrated ventrally; (4) "subgenital plate elongate and flattened″ which does not differ from the other species; and (5) "aedeagus with a pair of very short terminal processes″ which in M. tetramaculata sp. nov. are long. Features marked with an asterisk (*) are new inclusions to the genus diagnosis. It is important to emphasize that the feature "pronotum more than 3× as long as crown length″, as characterized by DeLong & Freytag (1963), needs to be observed in dorsal view. The median length of the crown is about 2.5× as long as the median length of pronotum in both species, if measured in lateral view.