[Millipedes] Male generally inserts spermatophore into female with gonopods [Centipedes] Male produces spermatophore that is usually picked up by female [Trait] 
Reproductive behavior
L e g s
L o c o m o t i o n
F e e d i n g
S p i r a c l e s
R e p r o d u c t i v e o p e n i n g s
R e p r o d u c t i v e b e h a v i o r