A New Species of Dicopomorpha (Hymenoptera: Mymaridae) with Diminutive, Apterous Males

A new species of Dicopomorpha is described of adults reared from and dissected from eggs of Echmepteryx hageni (Packard) (Psocoptera: Lepidopsocidae). Females differ from the described (South American) species in having funicular segment 2 similar in length to the preceding segment rather than much shorter. Males are completely wingless, lack eyes, and are ≈0.4 times the body length of females. These males, ≈139-240µm long, are the smallest adult insects currently known. A mature female occupies most of the volume of a host egg, but from 1 to 3 mature males may share the host egg with a female. Movement of the male outside of the host egg appears to be limited.