Option B
A. The membrane of the wings and between the two back legs is not a pattern of dark veins running through the light colored skin, and...
B. there is no light stripe of white or yellow running longitudinally along the body where the wings join the body.
C. The snout is not very short.
Select

There are 2 species known from Tanzania: Glauconycteris argentata and Glauconycteris variegata. The butterfly bats are characterized by the very short snout and hooked tragi. Look for a golden stripe where the wing inserts on the body of Glauconycteris argentata and a reticulated pattern on the wing and tail membranes of Glauconycteris variegata.