Mycetophila evanida Lastovka, 1972

Male terminalia. Posterior margin of gonocoxite ventromedially with clear convexity, and with abrupt and blunt projections laterally. Posterior impression rather wide. Anterior impression with anteriorly evenly divergent narrow arms. Ventral branch of gonostylus with semicircular posterior process which bears minute warts and few setae; spine 1 slender, evenly tapering and sharply pointed; spine 2 shorter, thicker and rather blunt; spines 3 and 4 much smaller than spine 1, sharply pointed and close to each other. Dorsal branch of gonostylus steeply tapering; lateral margin with shallow concavity; distal posterior process about half as high as proximal posterior process, both separated by shallow concavity. Distal posterior process with few setae; proximal posterior process bare with 2-3 setae deviating from other setosity on its base. Posterior margin proximally from medial bristle with 6 gradually diminishing bristles; internal surface with one somewhat stronger seta next to the medial bristle. Basal angle right-angled, basal margin with setae. Ejaculatory apodeme with subquadrate base and very wide rim. Aedeagus widened apically, apical margin slightly convex. Aedeagal guides with wide lateral impressions; apically narrow and rounded, not extending upper margin of aedeagus. Aedeagal apodemes laterally angular.
 

Intraspecific variation. In some cases the base of the ejaculatory apodeme resembles M. idonea, because of having its basal margin somewhat concave. The holotype has an additional small spine on the ventral branch of the gonostylus close to spines 3 and 4 (cf. Laštovka (1972: fig. 12). In studied material this spine was not observed.