No mnd⁴/mnd³⁵ animals are found after the early pupal stages. Intermediate allele. In mutant brains, the ventral ganglion is slightly smaller than that of wild-type. The brain lobes of the mutants are severely reduced (less than 50% of the diameter of wild-type brain lobes.) The imaginal discs in these mutants are also about one third of the size of discs from wild-type. The mnd⁴/mnd³⁵ fat body from mutant third instar larvae is less opaque than a fat body from wild-type late third instar, but similar in opacity and appearance to fat body from wild-type early third instar larvae. mnd⁴/mnd³⁵ mutant discs after in vivo culture in a wild-type adult female host, attain nearly normal size.