#2
Yes -- seems to have the Laphria/ Lampria m.p. Other features (face, antennae) indicate this is probably a Joartigasia sp. (very elaborate male genitalia would confirm this, which we get a hint of...).
Overall similarity to Andrenosomatini genera (which share the fallen-tree microhabitat with this genus) is striking. These flies are uncommon (not recorded from Tambopata area before) -- especially compared to abundant taxa of Andrenosomatini found in neotropical forests.